JPS6196469A - Method and instrument for measuring rotational speed of inside rotor of double rotary equipment - Google Patents

Abstract

PURPOSE:To measure the rotational speed of an inside rotor accurately by irradiating plural light fluxes which have different irradiation angles and can not be interrupted simultaneously by an outside rotor to a light shielding member of the inside rotor and compensating shifts due to the differences of the irradiation angles. CONSTITUTION:Two light fluxes 32A, 32B form a fixed angle phi each other and these two light fluxes 32A, 32B can not be shielded completely simultaneously by light shielding plates 34A, 35B, so that a fine time difference DELTAt corresponding to the angle phi is generated. Since the two light fluxes 32A, 32B are seemingly simultaneously shielded by the shielding plates 34A, 34B and light sources 30A, 30B and photodetecting elements 36A, 36B are arranged so that a part obtained by shielding the two light fluxes 32A, 32B by a twister 22 is not superposed to each other, the output waveform of an OR circuit 44 is removed from the influence of the twister 22 shielding the light fluxes 32A, 32B by inputting the output of an amplifier 38A and the output of a delay circuit 42 to the OR circuit 44. The outputted waveform signal is counted by a frequency counter 40 to measure the rotational speed of an overtwister.

Description

[Detailed description of the invention]

[Industrial Application Field 1] The present invention relates to a method and apparatus for measuring the rotational speed of the inner rotating body of a type 2 rotating Ha III, and is particularly used for measuring the rotational speed of an overtwister of a puncher-type wire twisting machine, for example. The present invention relates to improvements in a method and apparatus for measuring the rotational speed of an inner rotating body of a dual-rotation facility including an inner rotating body and an outer rotating body rotating outside the inner rotating body. [Prior Art] For example, east line bobbins 10A and 10B as shown in FIG.
, 10G, . . . are placed outside the stranding machine body 20, the puncher-type ms machine has the advantage that it can be made larger, and is widely used. In this puncher type wire twisting machine, a plurality of wire bobbins 10A and IOBs are placed outside the twisting machine main body 20. From each of 10C..., strands 12A112B. 12G..., as shown by arrow A, twist Ii 1 machine body 2
0, then goes along the rotating arc-shaped twister 22 (outer rotating body) to the opposite side of the strand entrance 20A, and is guided inside the rotating twister 22 and twisted. 624, and is wound onto the product bobbin 2g via the over twister 26 and the like. Quality control items for products manufactured by such a wire twisting machine include the uniformity of the twist, the twist shape, the tension when winding the product bobbin, etc. Since it is inside the rotating twister 22, it has the disadvantage that it is difficult to inspect the quality of the product. That is, for example, in order to guarantee the uniformity of the twist condition, the rotation speed of the over twister 26 used for straightening the twist of the product should be set to the rotation speed of the twister 22 (3000
It is important to maintain a constant ratio (60% to 70%) of the rotational speed of the overtwister 26 as well as the rotational speed of the twister 22. This overtwister 26 is connected to the twister 22, and although it has a mechanism that rotates in conjunction with the twister 22, slipping may occur at this connection and the ratio of the rotation speeds of the two may become inconsistent. Therefore, it is necessary to measure both rotational speeds independently.

[Problems that the invention attempts to solve]

However, conventionally, since the twister 22 that rotates on the outside exists, the rotational speed of the overtwister 26 has not been measured. This is because the overtwister 26 is inside the rotating twister 22, so it is difficult to extend the signal gaple all the way to the middle, and even if you try to measure the rotational speed of the overtwister 26 using an optical method, This is because the signal caused by the rotation of the twister 22 becomes noise in the rotation signal of the overtwister 26, making accurate measurement difficult. That is, as a method of measuring the rotational speed of the overtwister 26 by an optical method, for example, as shown in FIG.
A light source 30 is placed at a certain point outside the twister 22, and the collimated light beam 32 irradiated from the light R30 is, for example, one or more light beams attached to the overtwister rotating plate 26A that rotates at the same time as the overtwister 26. It is conceivable to measure the rotational speed of the overtwister 26 by receiving the light turned on and off by the shielding plates 34A, 34B, 134C, . However, in this method, the light beam 32 is transmitted to the overtwister rotary plate 26. Light shielding plates 34A, 34B, 34 attached to A
Since the output waveform of the light receiving element 36 becomes as shown in FIG. 2 (1A) because it is blocked not only by the twister 22 rotating on the outside thereof, it is difficult to accurately measure the rotational speed of the overtwister 26. It's impossible. Figure 2 (1A)
In the figure, the broken line part is the light beam 3 caused by the twister 22.
2 indicates the occluded part.

[Purpose of the invention]

The present invention has been made to solve the above-mentioned conventional problems, and is to accurately detect the rotational speed of the inner rotating body of a dual-rotation facility that includes an inner rotating body and an outer rotating body rotating outside of the inner rotating body. It is an object of the present invention to provide a method and device for measuring the rotational speed of an inner rotary body of a dual rotation facility.

[Means to solve the problem]

The present invention provides a method for measuring the rotational speed of an inner rotating body in a double rotating facility including an inner rotating body and an outer rotating body rotating outside the inner rotating body. A light reception signal after irradiating a plurality of light beams at different irradiation angles that are not blocked at the same time and correcting the deviation due to the difference in irradiation angle of the light beams received on the opposite side of the light beam shielding member. The above object is achieved by creating a rotation signal from the logical sum and determining the rotation speed of the inner rotating body from the rotation signal. The present invention also provides a rotational speed measuring device for an inner rotating body of a double rotating facility including an inner rotating body and an outer rotating body rotating outside the inner rotating body. Two light sources spaced apart from each other on the outside of the outer rotating body to emit two beams of light with different irradiation angles that are not blocked at the same time, and a beam of light on the opposite side of the light source shielding member. two light-receiving elements disposed at opposite positions to the light source for respectively receiving the light, two amplifiers for respectively amplifying the light-receiving signals output from the light-receiving elements, and one output of the amplifier. , a delay circuit that delays the two beams by a delay time corresponding to the difference in irradiation angles;
an OR circuit that outputs the OR of the output of the delay circuit and the other output of the amplifier as a rotation signal; and a frequency counter or a frequency-voltage converter for determining the rotation speed of the inner rotating body from the rotation signal. By providing this, the above objective is also achieved.

[Effect]

In the present invention, when measuring the rotational speed of the inner rotating body of a double rotating equipment including an inner rotating body and an outer rotating body rotating outside the inner rotating body, the outer rotating body is directed toward the light shielding member of the inner rotating body. The same, sometimes unobstructed by
A rotation signal is created from the logical sum of the light reception signals after irradiating a plurality of light beams at different irradiation angles and correcting the deviation of the light beams received on the opposite side of the light beam shielding member due to the difference in the irradiation angles. As a result, the influence of shielding by the outer rotating body is removed, making it possible to measure the rotational speed of the inner rotating body with high accuracy.

【Example】

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rotational speed measuring device for an overtwister of a wire twisting machine to which the present invention is applied will be described in detail below with reference to the drawings. In this embodiment, as shown in FIG. Two collimated light beams 32A, 32 whose irradiation angles differ by φ are not blocked at the same time.
The twister body 2 outside the twister 22 for irradiating B
Two lights [30A, 30B and
Two light receiving elements 36A, 36B disposed at positions opposite to the light source 30A130B for receiving the light beams 32A132B on opposite sides of the light shielding plates 34A134B, 34G, and the light receiving element 36A136.
Two amplifiers 38 each amplifying the received light signal of the B output.
A, 38B and the output of one of the amplifiers 38B,
A delay circuit 42 that delays the light flux 32A132B of the book by a delay time corresponding to the difference φ in the irradiation angle, and the delay circuit 42
and the output of the other amplifier 38A as a rotational signal, and a frequency counter 40 for determining the rotational speed of the overtwister 26 from the rotational signal. The light sources 30A and 30B are collimated,
Something that can generate directional light beams 32A and 32B,
For example, it is desirable to use a laser oscillator. The operation of the embodiment will be explained below. In the configuration as shown in FIG. 1, two light receiving elements 36A,
The waveforms when the signals corresponding to the amount of light received by each 36B are amplified by the amplifiers 38A and 138B are shown in Figure 2 (1).
A), the shape is as shown in (18). Here, the broken line portion is the portion where the light beams 32A and 32B are blocked by the twister 22. Since the two light beams 32A, 32B form a certain angle φ, the shielding plates 34A, 34B,
34G... are these two light beams 32A, 32 at the same time
- B is not blocked, and a minute time difference Δt corresponding to the angle φ occurs between the two received light amount waveforms (FIG. 2 (1A) and FIG. 2 (IB)). Therefore, the delay circuit 42
Accordingly, the light receiving output of the light receiving element 36B (Fig. 2 (1B))
is delayed by Δt to create a waveform as shown in FIG. 2 (2). At this time, in FIGS. 2(1A) and 2(2), apparently the upper two light beams 32A and 32B are
It is simultaneously blocked by B, 34G, and so on. Further, the portions where the two light beams 32A and 32B are blocked by the twister 22 are arranged in the light sources 30A and 30B so that they do not overlap when viewed in FIGS. 2(1A) and 2(2). Since the light receiving elements 32A and 32B are arranged, the output of the amplifier 38A (FIG. 2 (IA)) and the output of the delay circuit 42 (
2(2)) to the logical sum circuit 44, the output waveform (FIG. 2(3))
The effect of blocking A and 32B is removed. Therefore, the rotation speed of the overtwister 26 can be accurately measured by using the waveform shown in FIG. can. That is, Fig. 2 (
3) The frequency of the waveform shown in 3) can be adjusted by changing the frequency of the waveform shown in 3) to the light shielding plates 34A, 134B, 34C, and
By dividing by the number of sheets, the rotation speed of the overtwister 26 can be obtained. Therefore, abnormal rotation caused by a slip or the like that occurs at the connection part of the over twister 26 of the stranding machine main body 20 can be immediately detected, and normal rotation can be maintained by stopping the stranding machine and making repairs or adjustments. This has a great effect on ensuring the quality of products. According to research conducted by the inventors, 3 out of 10,000 product bobbins had defects such as uneven twist in wire twisting machines that did not measure the rotational speed of the overtwister. For example, by measuring the rotational speed of an overtwister and detecting abnormal rotation, it is now possible to immediately stop and make adjustments to eliminate defective products. In the above embodiment, a plurality of light shielding plates 34A are used.
, 34B, 34C... are over twister rotation tli
26A, the number of light shielding plates and the positions at which they are attached are not limited thereto, and it is possible to use only one light shielding plate or to attach them to other locations that rotate together with the overtwister 26. In addition, without providing a separate light shielding plate,
It is also possible to modify the shape of the overtwister 26 so that the overtwister 26 itself turns on and off the light beam 34A134B. Moreover, in the embodiment, two light beams 32A132B
However, the configuration of the present invention is not limited to this, and the two light beams may be configured to be turned on and off by separate light shielding members. It is possible. In the above embodiment, the present invention is applied to measuring the rotational speed of an overtwister of a puncher-type wire twisting machine, but the scope of application of the present invention is not limited to this. It is clear that the present invention can be similarly applied to measurement of the rotational speed of the inner rotating body of a general double-rotating equipment including the outer rotating body. Effects of the Invention 1 As explained above, according to the present invention, the rotational speed of the inner rotor of a dual-rotation facility including an inner rotor and an outer rotor rotating outside the inner rotor is determined by the rotational state of the outer rotor. Regardless of
It has the immersion effect of allowing accurate detection.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view, including a partial block diagram, showing the configuration of an embodiment of a rotational speed measuring device for an overtwister of a puncher-type wire twisting machine to which the present invention is adopted; FIG. 2 is a cross-sectional view including a partial block diagram; FIG. 3 is a longitudinal sectional view showing the overall configuration of a puncher type wire twisting machine to which the present invention is applied, and FIG. 4 is a diagram showing an example of signal waveforms of each part in the example. FIG. 2 is a cross-sectional view, including a partial block diagram, showing the configuration of a comparative example of a rotational speed measuring device using an optical method, which is applied to measuring the rotational speed of a twister. 22... Twister (outer rotating body), 26... Over twister (inner rotating body), 30A1
30B... Light source, 32A, 32B... Luminous flux, 34A, 34B, 34G... Light shielding plate, 36A, 3
6B... Light receiving element, 38A, 38B... Amplifier, 40... Frequency counter, 42... Delay circuit, 44... OR circuit.

Claims (2)

[Claims] (1) In a method for measuring the rotational speed of an inner rotating body of a double rotating equipment including an inner rotating body and an outer rotating body rotating outside the inner rotating body, a light beam shielding member of the inner rotating body is Logic of a light reception signal after irradiating a plurality of light beams at different irradiation angles that are not blocked substantially simultaneously, and correcting the deviation of the light beams received on the opposite side of the light beam shielding member due to the difference in irradiation angles. 1. A method for measuring the rotational speed of an inner rotary body in dual rotation equipment, characterized in that a rotation signal is created from the sum, and the rotation speed of the inner rotary body is determined from the rotation signal. (2) In a device for measuring the rotational speed of an inner rotating body of a double rotating equipment including an inner rotating body and an outer rotating body rotating outside the inner rotating body, Two light sources spaced apart from each other on the outside of the outer rotating body to emit two beams of light with different irradiation angles that are not blocked at the same time, and a beam of light on the opposite side of the light source shielding member. two light-receiving elements disposed opposite to the light source to respectively receive light; two amplifiers that amplify the light-receiving signals output from the light-receiving elements; and one output of the amplifiers. , a delay circuit that delays the two beams by a delay time corresponding to the difference in irradiation angle; and an OR circuit that outputs the logical sum of the output of the delay circuit and the other output of the amplifier as a rotation signal; 2, characterized in that it comprises a frequency counter or a frequency-voltage converter for determining the rotation speed of the inner rotating body from the rotation signal.
A device for measuring the rotational speed of the inner rotating body of heavy rotating equipment.