JPS5868110A - Random operating method for solenoid - Google Patents

Abstract

PURPOSE:To put a solenoid in random operation, by previously storing a group of random numbers in a storage element, outputting the whole or part of the random number group as data in response to an output indication to the storage element, and applying values obtained through arithmetic processing to the solenoid at need. CONSTITUTION:A bottom roller 3 turns at an invariably constant number of revolution, and a top roller 3' is associated with an arm 10 oscillated on a fulcrum 11 through a solenoid 9 to be pressed against the bottom roller 3 intermittently. Therefore, the operation of the solenoid 9 is controlled by a random signal generator 12, and the top roller 3' is pressed against the bottom roller 3 repeatedly in accordance with various random pulse waves generated by the random signal generator 12. In the random signal generator 12, numbers of random numbers are stored in a group previously and once an output indication is received, data are outputted, one by one, from the random number group in sequence. In this case, a necessary random pattern is obtaned by a program for selectively extracting only data necessary for the generation of the desired random pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling the operation of a solenoid in a random pattern.

Linear and rotary solenoids that utilize the principle of electromagnetism have a wide range of uses, and have recently come to occupy an important position as parts of automated equipment such as robots. On the other hand, in addition to its use in so-called automated equipment, solenoids are often used as a drive source for roller nips when, for example, a pair of rollers are used to intermittently supply or send out sheet-like materials or thread-like materials.

Well-known methods for intermittently supplying and feeding an object using a pair of rollers 7 include a method in which the object to be fed is constantly nipped between the rollers and the rollers are rotated intermittently; There is a method of intermittently supplying and sending out the material held between the two rollers by intermittently pressing the other roller against the other roller while keeping the rotational speed of the two rollers constant. Comparing the two here, the former has a supply rate of 2 and the frequency of intermittent supply exceeds a certain level (if the frequency of the intermittent supply exceeds a certain level, it will be difficult to put it into practical use, so
The former is also used for low speeds and low frequencies, but the latter is more often used for medium to high speeds and high frequencies.

On the other hand, there has recently been a growing demand in the market for randomizing the operation pattern of intermittent supply, that is, the repeating pattern of supply time and non-supply time, and various examples have been proposed to meet this demand. There is. That-
For example, a solenoid or an air cylinder is used as the actuating means for pressing one roller against the other roller, and the operation is controlled by a pulse wave signal in a dumb pattern. There is a method. In this case, the important point is how to create a random pattern pulse wave signal that is simple and versatile enough to meet market needs, and various proposals have been made in this regard. For example, conductive parts and insulating parts are appropriately arranged on the outer peripheral surfaces of a pair of metal rollers that circumscribe each other, and only when the conductive parts of the two-stroke rollers come into contact with each other, it becomes energized and forms the ON time of the pulse wave, and otherwise the pulse wave is pulsed. There is a method that determines the QFF time of the wave, and this method is often used easily because the device can be manufactured relatively easily.

In addition, as a method similar to this, holes are made in various places on the disc and a light emitting device and a receiver mounting screw are installed close to both sides of the disc, 72 sets of these are prepared, and both are rotated. Only when the light is energized, that is, when light enters the light receiving device through the hole in the disc, is considered an ON time, and other times are considered an OFF time. In order to achieve randomness in all of these cases, it is customary to devise measures such as choosing relatively prime numbers for the rotational speed of the two rollers or discs, but this cannot be called completely random. , it returns to the same pattern in a relatively short period. In addition, in both methods, once the roller or disk is made, the pattern that will be generated from now on is almost fixed,
At best, the degree of freedom is limited to changing the combination of rotation speeds, and a wide range of random patterns that meet market needs can be easily and freely designed. I have to say that we are far from that stage. However, the important thing to keep in mind here is that in pursuit of complete randomness, simplicity, versatility, and freedom of design are possible. It is not necessarily preferable to sacrifice these points, and in most cases there is no problem in practice as long as the pseudo-random pattern has a period as long as necessary.

The present invention has fully taken these points into consideration, and uses a simple method to create a pulse wave with a wide range of patterns that has long-period pseudo-randomness that causes no practical problems, and uses the pulse wave to drive a solenoid in a random pattern. The present invention provides a method for controlling the operation.

In other words, the gist of the present invention is to extract all or part of a random number group as data from a storage element in which a random number group has been stored in advance according to an output instruction, and perform arithmetic processing as necessary to obtain a value. O of twist/id operation
N time data group and OFF time data group, and the ON
A random operating method for a solenoid is characterized in that the operation of the solenoid is controlled by a pulse wave signal composed of time data and/or OFF time data.

Below, the present invention will be explained in detail according to the drawings.
The figure is a perspective view showing an example of a fiber processing device using a nip roller operated by the twisting (5) noise controlled by the present invention.
) is the nip roller (3) which is the supply roller (3
') and (4') are separately supplied to the fluid processing nozzle (5) by (4'), and after passing through the nozzle (5), they are combined into one thread and sent to the take-up roller (6) as a processed thread (8).
The winding material passes through the winding bobbin (7) and is wound onto the winding bobbin (7). Here, the nip rollers (3) (3') are nip rollers that operate randomly according to the present invention, and by intermittently and randomly changing the supply amount of the raw yarn (21), the processed yarn (8 ).The nip rollers (3) (3') in Fig. 1 are explained in more detail in Fig. 2. In the figure, the bottom roller (3) always rotates at a constant rotation speed. The top roller (3') operates in conjunction with the arm (10) which is oscillated by the solenoid (9) about the fulcrum (11), and rotates the bottom roller (3').
) to be crimped intermittently. However, the operation of the solenoid (9) is controlled by the random signal generator (12) and the operation of the top roller (3') is performed according to various (6) random pulse waves emitted from the random signal generator (12).
The pressing operation of the bottom roller (3) is repeated. In the random signal generator (12), a random pulse wave is sent to the lenoid (9) through a path as shown in the flowchart of FIG. That is, a large number of random numbers are stored in a memory element in advance, and when an output instruction is received, each piece of data is taken out one by one from the random number group in order.At this time, it takes knowledge to create the desired random pattern. Install a program that selectively retrieves only the relevant data.

Next, perform appropriate arithmetic processing such as addition, subtraction, multiplication, and division on the selected basic data as necessary, and turn the resulting value ON.
Use time data. According to this procedure, data is extracted one after another from the memory element and the final result is a set of values 7ON
It is a time data group. Each numerical value obtained here should fall within a range suitable for creating the desired random pattern pulse wave, and conversely, it is important to select data from the random number group and perform calculations so that this happens. The same procedure is followed to create one OFF time data group, which requires some modification to the processing content, and the obtained data can be combined alternately, or only the ON or OFF time data groups can be used to create a pair. By using another value, such as a constant value, as the exponent data, a pulse wave can be extracted as an output signal.

The important point in this case is how to create randomness. In order to achieve this, the present invention uses a random number group as the basis for all data, but since there are two groups, the number of data is finite, and if the number is increased extremely, the capacity of the storage element will also increase accordingly. , it is necessary to set a limit.Therefore, there is a dull/dumb nature within a certain period where a period is included in the randomness, and it cannot be said to be completely random.

Therefore, the inventors of the present invention tried various methods to achieve randomness with one necessary and sufficient period (hereinafter, this period will be referred to as a random period) using an extremely large number of random numbers.

One is to set the number of ON and OFF time data in advance to be mutually prime numbers, and then combine them to create a pulse wave.When each reaches the final data, it returns to the beginning. The random period is set as the step number of the product of both data numbers, and ON and OFF are set so that this value becomes a random period that does not pose a practical problem.
This is a method of selecting the number of time data. For example, ON
Set the number of time data to 1999. If the setting value in the case of OFF is 2111, the least common multiple of both numbers is 2111X
1999=4219889, and the random period is 4219889 steps. For example, if the average value of l steps (total time of (one ON time) + (one OFF time)) is 1 second, the random period is 42
This is 19889 seconds, or 1172 hours.

In this example, it is sufficient to judge whether the random period of 1172 hours is acceptable in practice, and if it is not appropriate, go back and change the setting value.

(9) In another method, the first combination is ON, O.
The FFs combine the data in a good order, and when the final data is reached, the ON goes back to the beginning and goes in the same order as the first time, and the OFF goes backwards (there are various methods that can be considered).

In any case, as long as there is a certain amount of data, it is possible to make the random period yx as long as necessary by using various combinations, which can be solved by programming.

As described above, according to the present invention, a group of random numbers is simply stored in a memory element in advance, and the rest of the processing is performed by freely assembling data by programming and performing arithmetic processing to create random pulses of a desired pattern. It is possible to generate waves with a random period that does not cause any practical problems, thereby enabling random operation of the solenoid.

So far, we have described the case in which the random actuation method of a solenoid according to the present invention is applied to a nip roller of a textile processing device.9 The present invention is not limited to this, but can be applied to any case in which a solenoid is used as a power source. It can also be applied to air cylinders that have the same type of movement as a solenoid. Furthermore, although FIG. 2 shows an example in which a linear solenoid is used, the control method according to the present invention can of course be applied in the same way even if the solenoid is replaced with a rotary solenoid, with only a slight change in mechanism.

2 is a perspective view showing details of a part of the mechanism of the nip roller in FIG. 1, and FIG. 3 is a flow chart showing the procedure for creating a random square wave. In Figure 2, (11, (21 is the yarn, (3”
l(3') is a nip roller that operates randomly;
(4) (4') is a normal nip roller.

(5) is a fluid processing nozzle, (6) is a take-up roller, (7
) is the winding bobbin, (8) is the processed yarn, (9) is the solenoid, (10) is the arm, (11) is the fulcrum, (+
2) is a random signal generator.

(11) Paralysis 1 diagram E Figure 2

Claims (1)

[Claims] According to the output instruction, all or part of the random number group data is retrieved from a memory element in which a random number group is stored in advance, and the values obtained by performing arithmetic processing as necessary are used as the ON time data group and OFF time data group of the solenoid operation. A random operation method for a solenoid, characterized in that the operation of the solenoid is controlled by a pulse wave signal which is a data group and is composed of the 08 hour data and/or the OFF time data.