Loom stroboscope

Abstract

To provide a stroboscope for weaving machines, which allows for efficiently adjusting the delay angle.SOLUTION: A stroboscope 10 for weaving machines is provided, comprising a light emitter 11, and a trigger control unit 13a configured to output a trigger signal to the light emitter 11 to cause the light emitter 11 to emit light when a main shaft 101 of a weaving machine 100 turns to cause the rotation angle to change by a delay angle from a reference angle. The trigger control unit 13a causes the delay angle to change by a given variation width within a given variation range.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a stroboscope for a loom. [Background technology]

[0002] A stroboscope is used to observe a loom. A loom stroboscope used to observe a loom includes a light emitter, a trigger control unit, and an input unit. As disclosed in Patent Document 1, the trigger control unit outputs a trigger signal to the light emitter to cause it to emit light when the rotation angle of the main shaft of the loom rotates by the delay angle from the reference angle. The observer sets the delay angle to a desired angle by operating the input unit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 6-9158 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, there is a preferred delay angle that makes it easy to observe the loom. Therefore, the observer adjusts the delay angle so that it becomes a preferred angle. The delay angle adjustment work is performed, for example, as follows: First, the observer sets the delay angle to an expected preferred angle by operating the input unit. Next, the observer observes the loom at the set delay angle. If the set delay angle is not a preferred angle, the observer changes the delay angle by operating the input unit. The observer observes the loom at the changed delay angle. If the changed delay angle is not a preferred angle, the observer changes the delay angle again. In this way, the delay angle adjustment work requires alternating between inputting the delay angle and visually observing the loom, which reduces work efficiency. [Means for solving the problem]

[0005] The stroboscope for a loom that solves the above problems comprises a light emitter and a trigger control unit that outputs a trigger signal to the light emitter to cause the light emitter to emit light when the rotation angle of the main shaft of the loom rotates by a delay angle from a reference angle, and the trigger control unit changes the delay angle by a predetermined amount within a predetermined change range.

[0006] Because the trigger control unit changes the delay angle by a predetermined amount within a predetermined range, the observer does not need to perform an input operation each time the delay angle is changed, and therefore the delay angle can be adjusted efficiently.

[0007] The stroboscope for a loom may further include an input unit for inputting the predetermined change range and the predetermined change width. The observer can set the range and amount of change to desired values ​​using the input unit.

[0008] The stroboscope for a loom may further include a camera that captures an image in synchronization with the light emitted by the light emitter. The state of the loom at each delay angle can be imaged.

[0009] The stroboscope for a loom may further include an image display unit that displays an image captured by the camera. The observer can observe the loom through the image display unit.

[0010] In the above-described stroboscope for a loom, the trigger control unit may repeatedly change the delay angle by the predetermined change width within the predetermined change range. Looms operate at high speeds. Therefore, if the trigger control unit does not repeatedly change the delay angle, it may be difficult to observe visually. However, if the trigger control unit repeatedly changes the delay angle, it becomes easier to observe visually. [Effects of the Invention]

[0011] According to the present invention, the delay angle can be adjusted efficiently. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram illustrating the configuration of a stroboscope for a loom and a loom. [Figure 2] 4A and 4B are diagrams for explaining the relationship between an external input signal and a trigger signal. [Figure 3] FIG. 2 is a schematic diagram showing the display content of a display unit. DETAILED DESCRIPTION OF THE INVENTION

[0013] An embodiment of a stroboscope for a loom will be described below with reference to Figs. 1 to 3. A stroboscope for a loom is a stroboscope used to observe a loom. In this embodiment, observing a loom means observing the flight state of a weft yarn. In this embodiment, the loom 100 is an air jet loom that inserts a weft using air.

[0014] <<Configuration of the loom>> As shown in FIG. 1, a loom 100 has a main shaft 101 and a nozzle (not shown) that sprays a weft yarn. The main shaft 101 is driven by a main motor (not shown). The timing at which the nozzle sprays the weft yarn corresponds to the rotation angle of the main shaft 101. Specifically, the nozzle sprays the weft yarn when the rotation angle of the main shaft 101 has rotated a predetermined angle from a specific angle. In the following description, the specific rotation angle of the main shaft 101 is referred to as a reference angle. Furthermore, the delay angle relative to the reference angle is referred to as a delay angle.

[0015] The loom 100 has a detection unit 102 and an output unit 103. The detection unit 102 detects the rotation angle of the main shaft 101. The detection unit 102 is, for example, a rotary encoder. The detection unit 102 is connected to the output unit 103. The detection unit 102 transmits the detection result to the output unit 103. The output unit 103 outputs a signal to the loom stroboscope every time the rotation angle of the main shaft 101 detected by the detection unit 102 reaches a preset reference angle. For example, if the reference angle is 0°, the output unit 103 outputs a signal every time the rotation angle of the main shaft 101 reaches 0°.

[0016] <<Configuration of a loom stroboscope>> The loom stroboscope 10 includes a light emitter 11, a camera 12, a control device 13, an input unit 14, and a display unit 15.

[0017] <Light emitter> The light emitter 11 is, for example, an LED light. The light emitter 11 is provided on the surface of a housing (not shown) of the loom stroboscope 10. The light emitter 11 is connected to a trigger control unit 13a of the control device 13. The trigger control unit 13a will be described later. The light emitter 11 emits light when a trigger signal is input from the trigger control unit 13a.

[0018] <Camera> Camera 12 is an imaging device. Camera 12 includes an imaging element. Camera 12 is provided on the surface of the housing so as to be able to capture an image of the area illuminated by light emitter 11. Camera 12 is connected to trigger control unit 13a. Camera 12 captures an image in response to a trigger signal input from trigger control unit 13a.

[0019] The loom stroboscope 10 is disposed on the loom 100 so that the light source 11 illuminates the weft yarn and the camera 12 captures an image of the weft yarn. The loom stroboscope 10 may be fixed at a desired position by a fixing device (not shown).

[0020] <Control device> The control device 13 includes a processor and a storage unit. The processor may be, for example, a central processing unit (CPU), a graphics processing unit (GPU), or a digital signal processor (DSP). The storage unit includes a random access memory (RAM) and a read-only memory (ROM). The storage unit stores program code or instructions configured to cause the processor to execute a process. The storage unit, i.e., a computer-readable medium, includes any available medium accessible by a general-purpose or special-purpose computer. The control device 13 may be configured with a hardware circuit such as an application-specific integrated circuit (ASIC) or a field-programmable gate array (FPGA). The control device 13, which is a processing circuit, may include one or more processors operating according to a computer program, one or more hardware circuits such as an ASIC or an FPGA, or a combination thereof.

[0021] The control device 13 includes a trigger control unit 13a that controls the trigger signal and a display control unit 13b that controls the display unit 15. As described above, the trigger signal in this embodiment is a signal that causes the light emitter 11 to emit light and the camera 12 to capture an image. In other words, the trigger control unit 13a controls the trigger signal to control the light emitter 11 and the camera 12.

[0022] The trigger control unit 13a is connected to the output unit 103 of the loom 100. The signal output by the output unit 103 of the loom 100 is input to the trigger control unit 13a as an external input signal. The trigger control unit 13a sets a delay angle. Setting of the delay angle will be described later. The trigger control unit 13a controls the trigger signal based on the external input signal input from the loom 100 and the set delay angle.

[0023] As shown in Fig. 2, trigger control unit 13a determines the rotation period Tm of main shaft 101 from the interval at which the external input signal is input. Trigger control unit 13a converts the delay angle into a delay time Td using the rotation period Tm of main shaft 101 and a reference angle. Trigger control unit 13a outputs a trigger signal to light emitter 11 and camera 12 at time ts, when delay time Td has elapsed since time tr, when the external input signal was input. In other words, trigger control unit 13a outputs a trigger signal to light emitter 11 and camera 12 when the rotation angle of main shaft 101 has rotated by the delay angle from the reference angle.

[0024] The loom stroboscope 10 of this embodiment has a first setting mode in which the delay angle is set to a fixed value, and a second setting mode in which the delay angle is changed, with respect to setting the delay angle.

[0025] When the loom stroboscope 10 is set to the first setting mode, the trigger control unit 13a sets one angle input by the observer via the input unit 14 as the delay angle. When the loom stroboscope 10 is set to the second setting mode, the trigger control unit 13a changes the delay angle by a predetermined amount within a predetermined range of change. The trigger control unit 13a sets a plurality of delay angles that change by a predetermined amount within the predetermined range of change.

[0026] Trigger control unit 13a in this embodiment outputs a trigger signal once for one rotation of spindle 101. Trigger control unit 13a sets one delay angle for one rotation of spindle 101. Trigger control unit 13a changes the delay angle by a predetermined amount within a predetermined range for each rotation of spindle 101.

[0027] In this embodiment, the range and amount of change of the delay angle are set by the observer. The range of change of the delay angle is set by setting the minimum value and the maximum value of the delay angle. In other words, the range from the minimum value to the maximum value of the delay angle is the range of change of the delay angle.

[0028] In this embodiment, the trigger control unit 13a repeatedly changes the delay angle by a predetermined amount within a predetermined range of change until the viewer stops the second setting mode. Specifically, the trigger control unit 13a changes the delay angle by a predetermined amount within the range of change from the minimum value to the maximum value. After setting the delay angle to the maximum value within the range of change, the trigger control unit 13a next sets the delay angle to the minimum value within the range of change.

[0029] <Input section> The input unit 14 is provided on the housing of the loom stroboscope 10. The input unit 14 is a section where an observer performs input operations to the loom stroboscope 10. The input unit 14 of this embodiment has, for example, a dial for inputting an angle and operation buttons for selecting buttons displayed on the display unit 15.

[0030] <Display section> The display unit 15 is provided on the housing of the loom stroboscope 10. The display unit 15 displays information under the control of the display control unit 13b.

[0031] 3, the display control unit 13b displays an operation screen and a captured image on the display unit 15. The display unit 15 is an operation screen display unit that displays the operation screen and an image display unit that displays the captured image.

[0032] The operation screen is a screen on which an observer performs operations related to the loom stroboscope 10. The operation screen shown in Fig. 3 is the operation screen when the loom stroboscope 10 is set to the second setting mode. The operation screen includes an input screen for inputting the minimum value, maximum value, and change width of the delay angle, an OK button for starting the second setting mode, and a cancel button for stopping the second setting mode. Although not shown, the operation screen also includes a mode change button for changing the setting mode of the loom stroboscope 10 to the first setting mode, a start button for starting the operation of the loom stroboscope 10, and an end button for ending the operation.

[0033] The observer inputs the desired angle by turning the dial of the input unit 14 while checking the angle displayed on the input screen of the display unit 15. The observer also operates the operation buttons of the input unit 14 while checking the operation screen of the display unit 15, thereby selecting the desired button from the multiple buttons displayed on the display unit 15.

[0034] <<Operation of the loom stroboscope 10>> The operation of the loom stroboscope 10 when it is set to the second setting mode will be described below using a specific example.

[0035] The observer sets the range and width of change of the delay angle by operating the input unit 14. For example, if the nozzle ejects the weft when the rotation angle of the main shaft 101 is 90°, it is considered that the state of the weft can be observed by setting the delay angle to a value close to 90°. Therefore, the observer inputs the following into the input screen of the operation screen: minimum value: 90°, maximum value: 105°, width of change: 5°. Then, the observer selects the OK button.

[0036] The trigger control unit 13a sets the delay angle based on the minimum value, maximum value, and variation width values ​​input from the input unit 14. The trigger control unit 13a changes the delay angle in 5° increments within a range from 90° to 105°.

[0037] 2, the trigger control unit 13a sets the delay angle to 90[°]. The trigger control unit 13a outputs a trigger signal at time ts1[s], which is a delay time Td1[s] corresponding to the delay angle of 90[°], from time tr1[s] when the external input signal is input.

[0038] The trigger control unit 13a then sets the delay angle to 95°. The trigger control unit 13a outputs a trigger signal at time ts2, which is the delay time Td2 (s) corresponding to the delay angle of 95° from time tr2 (s) when the external input signal is input.

[0039] The trigger control unit 13a then sets the delay angle to 100[°]. The trigger control unit 13a outputs a trigger signal at time ts3[s], which is the delay time Td3[s] corresponding to the delay angle: 100[°], from time tr3[s] when the external input signal is input.

[0040] The trigger control unit 13a then sets the delay angle to 105[°]. The trigger control unit 13a outputs a trigger signal at time ts4[s], which is the delay time Td4[s] corresponding to the delay angle: 105[°], from time tr4[s] when the external input signal is input.

[0041] The trigger control unit 13a then sets the delay angle to 90[°]. The trigger control unit 13a outputs a trigger signal at time ts5[s], which is the delay time Td1[s] corresponding to the delay angle: 90[°], from time tr5[s] when the external input signal is input.

[0042] In this way, the trigger control unit 13a repeatedly changes the delay angle until the viewer selects the cancel button to stop the second setting mode. The light emitter 11 emits light every time a trigger signal is input. The camera 12 captures an image every time a trigger signal is input. The timing at which the camera 12 captures an image coincides with the timing at which the light emitter 11 emits light. That is, the camera 12 captures an image in synchronization with the light emission of the light emitter 11. The display control unit 13b displays the captured image captured by the camera 12 on the display unit 15. An observer can observe the flying state of the weft yarn not only visually but also from the captured image displayed on the display unit 15.

[0043] The operation and effects of this embodiment will be described. (1) The trigger control unit 13a changes the delay angle by a predetermined amount within a predetermined range. This eliminates the need for the observer to input the delay angle each time the delay angle is changed. This allows the delay angle to be adjusted efficiently.

[0044] (2) The loom stroboscope 10 is provided with an input unit 14 for inputting a predetermined change range and a predetermined change width. Therefore, the observer can set the change range and change width of the delay angle to desired values ​​using the input unit 14.

[0045] (3) The loom stroboscope 10 includes a camera 12 that captures images in synchronization with the light emitted by the light emitter 11. The camera 12 can capture images of the state of the loom 100 at each delay angle. (4) The loom stroboscope 10 is provided with a display unit 15 that displays the image captured by the camera 12. Therefore, an observer can observe the flying state of the weft yarn through the display unit 15.

[0046] (5) The loom 100 operates at a high speed. Therefore, if the trigger control unit 13a does not repeatedly change the delay angle, it may be difficult to observe visually. In contrast, in this embodiment, the trigger control unit 13a repeatedly changes the delay angle, making it easier to observe visually.

[0047] This embodiment can be modified as follows: This embodiment and the modifications can be combined with each other within the scope of technical compatibility. The loom stroboscope 10 does not have to include the camera 12.

[0048] The loom stroboscope 10 may have only the second setting mode. The loom stroboscope 10 may have a touch panel instead of the input unit 14 and the display unit 15. The touch panel is provided on the housing of the loom stroboscope 10. The touch panel serves as both the input unit and the display unit. In this case, the observer operates the touch panel to input the predetermined change range and the predetermined change width. The display control unit 13b controls the display of the touch panel. The observer can observe the weft yarn by looking at the captured image displayed on the touch panel.

[0049] The operation screen display unit that displays the operation screen and the image display unit that displays the captured image may be provided separately from the housing of the loom stroboscope 10 . The loom stroboscope 10 may be configured so that the observer can set only either the minimum or maximum value of the delay angle change range. When the observer sets only the minimum value of the delay angle, the maximum value of the delay angle is assumed to be pre-stored in the memory of the control device 13. When the operator inputs only the maximum value of the delay angle, the minimum value of the delay angle is assumed to be pre-stored in the memory of the control device 13.

[0050] In the above embodiment, the range of change of the delay angle is set by setting a minimum value and a maximum value. However, the range of change of the delay angle may be set by setting a reference value θb and an angle width ±α relative to the reference value θb. In this case, the range of change of the delay angle is (θb-α) to (θb+α).

[0051] The stroboscope 10 for a loom may be configured so that only the reference value θb is set by the observer. In this case, the angular width α is stored in the storage unit of the control device 13.

[0052] The amount of change in the delay angle may be a fixed value stored in advance in the storage unit of the control device 13. The trigger control unit 13a does not need to repeatedly change the delay angle by a predetermined amount within a predetermined range of change. In other words, the trigger control unit 13a may end setting the delay angle after setting it to the maximum value within the range of change.

[0053] The loom stroboscope 10 may have a connection port to which an external memory such as a USB or SD card can be connected. In this case, images captured by the camera 12 can be saved in the external memory.

[0054] If the camera 12 is configured to capture an image in synchronization with the light emitted by the light emitter 11, the trigger control unit 13a does not necessarily need to send a trigger signal to the camera 12. The object to be observed is not limited to the weft yarn. For example, the object to be observed may be the loom 100 itself. [Explanation of symbols]

[0055] 10...stroboscope for loom, 11...light emitter, 12...camera, 13a...trigger control unit, 14...input unit, 15...display unit as image display unit, 100...loom, 101...main shaft

Claims

1. A light emitter and a trigger control unit that outputs a trigger signal to the light emitter to cause the light emitter to emit light when the rotation angle of the main shaft of the loom rotates by a delay angle from a reference angle, The stroboscope for a loom, wherein the trigger control unit changes the delay angle by a predetermined amount within a predetermined range for each rotation of the main shaft.

2. The stroboscope for a loom according to claim 1, further comprising an input unit for inputting the predetermined change range and the predetermined change width.

3. 3. The stroboscope for a loom according to claim 1, further comprising a camera that captures an image in synchronization with light emission from the light emitter.

4. The stroboscope for a loom according to claim 3, further comprising an image display unit for displaying an image captured by the camera.

5. The stroboscope for a loom according to any one of claims 1 to 4, wherein the trigger control unit repeatedly changes the delay angle by the predetermined change width within the predetermined change range.

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