broken filament and broken thread sensor

Abstract

The utility model adopts a kind of broken filament broken yarn sensor, including the sensor body with control panel inside, sensor body includes transmitting end, receiving end and the signal detection port of wide slot bidirectional outer expansion formula structure, signal detection port includes extension wall one and extension wall two, the end of transmitting end is in the position of extension wall one and extends, the end of receiving end is in the position of extension wall two and extends, and both ends are oppositely distributed.Making signal detection port can pass through outer eight zhi groove type, can make yarn swing space be widened, current fluctuation amplitude can be expanded to 0.02~0.05 range, so that once broken yarn occurs, when current is from 0.05 sudden drop to 0 variation difference more remarkable, also make broken filament broken yarn sensor when working, can quickly capture this signal mutation, and then realized for broken filament broken yarn process accurate determination, also make effectively solved the detection delay problem caused by small fluctuation, insufficient sensitivity of narrow slot sensor.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a broken yarn sensor. Background Technology

[0002] The yarn breakage sensor is used in industries such as textiles and chemical fibers to monitor the continuous status of yarn / filament in real time.

[0003] In practical use, the yarn is usually released from the spindle (i.e., the original yarn spool), guided by the yarn guide wheel, and then passes through the yarn breakage sensor fixed on the equipment frame support. (Preferred installation: installed between the spindle and the winding drum (i.e., the finished winding drum) The sensor remains stationary after installation, and the yarn passes between its transmitting and receiving ends, and is then guided by the yarn guide wheel to finally wind onto the winding drum. During winding, the yarn will move laterally and shake slightly within the sensor detection area, continuously blocking the infrared light so that the receiving end generates a continuous pulse signal. The sensor determines that the yarn is normal. Once a yarn breaks, the yarn leaves the detection area, the pulse signal is interrupted, and the sensor immediately triggers an alarm or stops the machine to avoid production losses caused by yarn breakage.)

[0004] In the field of yarn winding detection, narrow-slot yarn breakage sensors are the most commonly used type. They can adapt to the tight equipment installation space between the spindle and the winding drum, and are especially suitable for equipment with limited installation space or for detecting fine and easily worn yarns. However, due to the limited slot space, the yarn swing amplitude in the detection area (the detection area formed between the transmitter and receiver) is small, resulting in the output current fluctuation amplitude after photoelectric signal conversion being only within a small range (generally within the range of 0.02~0.03). To avoid misjudgment due to interference from cotton lint, equipment vibration, etc., the sensor usually needs to detect the signal abnormality 5 times consecutively before determining that the yarn is broken. However, when the yarn is actually broken, the change in the signal from a low value to 0 is not obvious, which can easily lead to untimely detection feedback. Summary of the Invention

[0005] In view of the above shortcomings, this utility model provides a yarn breakage sensor that can increase the output current fluctuation amplitude, realize the yarn breakage stage, make the numerical change difference during the sudden drop process more significant, and enable the rapid capture of such signal change.

[0006] To achieve the above objectives, this utility model employs a broken yarn sensor, comprising a sensor body with a built-in control board. The sensor body includes a signal detection port distributed at one end of the sensor body, and a transmitting end and a receiving end connected to the control board and forming a signal receiving and feedback mechanism through the control board. The signal detection port has a wide-slot bidirectional outward expansion structure, which includes an expansion wall one and an expansion wall two extending outward in opposite directions. The transmitting end is distributed within the sensor body, with its end extending from the position of the expansion wall one. The receiving end is distributed within the sensor body, with its end extending from the position of the expansion wall two. The ends of the transmitting end and the receiving end are distributed opposite to each other.

[0007] The present invention is further configured such that the sensor body includes a housing, and notches for forming signal detection ports are distributed on one side of the housing. A cavity with a U-shape is formed inside the housing. The U-shaped cavity includes an inner sidewall 1 and an inner sidewall 2 distributed in the direction of the notch, and an outer sidewall 1 and an outer sidewall 2 opposite to the inner sidewall 1. The control board has a notch adapter portion for notch adapter wall 1 and notch adapter wall 2. The control board is placed in the U-shaped cavity. The notch adapter wall 1 is adjacent to the inner sidewall 1, the notch adapter wall 2 is adjacent to the inner sidewall 2, the side of the control board opposite to the notch adapter wall 1 is adjacent to the outer sidewall 1, and the side of the control board opposite to the notch adapter wall 2 is adjacent to the outer sidewall 2. Both the transmitting and receiving ends are LED beads with pins. The inner wall 1 and inner wall 2 of the control board are respectively provided with LED bead mounting slots. The bottom end of the LED bead contacts the bottom of the mounting slot. The pins of the LED bead are soldered to the control board and are the shortest pins that can be soldered to the control board. The width from the LED bead mounting slot on inner wall 1 to outer wall 1 is the optimal width for soldering and installing the shortest pin. The width from the LED bead mounting slot on inner wall 2 to outer wall 2 is the optimal width for soldering and installing the shortest pin.

[0008] The present invention is further configured such that two mounting holes are formed on the housing relative to the end away from the notch, and a mounting base having a 32-gauge connection hole and a 36-gauge or 37-gauge seat hole is optionally provided on the end of the housing relative to the end with the two mounting holes. The two mounting holes enable the broken yarn sensor to be compatible with a 32-gauge installation. The 32-gauge connection hole is connected to the two mounting holes respectively, and the mounting base enables the broken yarn sensor to be compatible with a 36-gauge or 37-gauge installation.

[0009] The present invention is further configured such that the housing includes a bottom shell for the distribution of the U-shaped cavity and a cover plate covered and connected to the bottom shell. The connection between the bottom shell and the cover plate is an ultrasonically treated structure. The control board is a control board with conformal coating protection. The bottom side of the bottom shell is provided with a glue-filling hole. Glue filling is performed through the glue-filling hole to form a potting seal inside the U-shaped cavity.

[0010] The present invention is further configured such that the sensor body also includes a status indicator light with red and green light indication. The status indicator light is distributed inside the housing and forms an electrical connection with the control board. The top of the status indicator light extends out of the housing and is exposed at the notch of the housing. The status indicator light forms a green light indication for the working stage of the yarn breakage sensor or a red light stop indication for the yarn breakage stage.

[0011] The present invention is further configured such that the status indicator lights are located at the bottom of the notch.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: by adopting a wide-slot bidirectional outward expansion structure for the signal detection port of the broken yarn sensor, the synchronous signal detection port will involve an expansion wall one and an expansion wall two that extend outward in opposite directions. The structure formed is preferably similar to a figure-eight groove structure design. The transmitting end and receiving end used on the broken yarn sensor involve an expansion wall one and an expansion wall two, and the ends of the transmitting end and the receiving end are distributed in a relative manner. This design allows the signal detection port of the yarn breakage sensor involved in this invention to be wider in actual use by widening the yarn swing space and increasing the current fluctuation range (for example, the range of 0.02~0.03 can be expanded to 0.02~0.05). This makes the difference in current change from 0.05 to 0 more significant when yarn breakage occurs. It also enables the yarn breakage sensor to quickly capture this signal change during operation, thereby achieving accurate judgment of the yarn breakage process. Since the difference in the sudden drop value is significant, the change in value does not need to be confirmed multiple times, which effectively solves the detection delay problem caused by the small fluctuation and insufficient sensitivity of narrow slot sensors. Attached Figure Description

[0013] Figure 1 This is a first-view perspective three-dimensional schematic diagram of the broken yarn sensor according to an embodiment of this utility model; Figure 2 yes Figure 1 Enlarged schematic diagram of part A; Figure 3 yes Figure 1 Enlarged schematic diagram of part B; Figure 4 This is a second-view perspective three-dimensional schematic diagram of the broken yarn sensor according to an embodiment of this utility model; Figure 5 yes Figure 4 Enlarged schematic diagram of part C; Figure 6 yes Figure 4 Enlarged schematic diagram of part D; Figure 7 This is a three-dimensional schematic diagram of the broken yarn sensor after removing the cover plate and mounting base according to an embodiment of this utility model; Figure 8 yes Figure 7 Enlarged schematic diagram of part E; Figure 9 yes Figure 7 Enlarged schematic diagram of part F. Detailed Implementation

[0014] like Figure 1-9 As shown, a specific embodiment of this utility model is a broken yarn sensor, including a sensor body with a built-in control board 5. The sensor body includes a signal detection port 10 distributed on one end of the sensor body, and a transmitting end 3 and a receiving end 4 connected to the control board 5 and forming a signal receiving and feedback through the control board 5. The signal detection port 10 has a wide slot bidirectional outward expansion structure. The wide slot bidirectional outward expansion signal detection port 10 includes an expansion wall 101 and an expansion wall 2 102 that extend outward in opposite directions. The transmitting end 3 is distributed in the sensor body, and the end 50 of the transmitting end 3 extends out at the position of the expansion wall 101. The receiving end 4 is distributed in the sensor body, and the end 50 of the receiving end 4 extends out at the position of the expansion wall 2 102. The ends 50 of the transmitting end 3 and the ends 50 of the receiving end 4 are distributed opposite to each other.

[0015] By adopting a wide-slot bidirectional outward expansion structure for the signal detection port 10 of the broken yarn sensor, the synchronous signal detection port 10 will involve an expansion wall 101 and an expansion wall 102 that extend outward in opposite directions. The structure formed is preferably similar to a figure-eight groove structure design. The transmitter 3 and receiver 4 used on the broken yarn sensor involve the expansion wall 101 and the expansion wall 102, respectively. At the same time, the ends 50 of the transmitter 3 and the ends 50 of the receiver 4 are distributed in opposite directions. This design allows the signal detection port 10 of the yarn breakage sensor to be wider and the current fluctuation range to be increased (for example, the range of 0.02~0.03 can be expanded to 0.02~0.05) by using an outward V-shaped slot design. This makes the difference in current change from 0.05 to 0 more significant when yarn breakage occurs. It also enables the yarn breakage sensor to quickly capture this signal change during operation, thereby achieving accurate judgment of the yarn breakage process. Since the difference in the sudden drop value is significant, the change in value does not need to be confirmed multiple times, which effectively solves the detection delay problem caused by the small fluctuation and insufficient sensitivity of narrow slot sensors.

[0016] like Figure 1-9 As shown, the sensor body includes a housing 2. Notches for signal detection ports 10 are distributed on one side of the housing 2. A cavity with a U-shape is formed inside the housing 2. The U-shaped cavity includes an inner wall 1 214 and an inner wall 215 distributed in the direction of the notch, and an outer wall 1 212 opposite to the inner wall 1 214 and an outer wall 213 opposite to the inner wall 215. The control plate 5 has a notch adapter part 51 with a notch adapter wall 1 53 and a notch adapter wall 2 54. The control plate 5 is placed in the U-shaped cavity. The notch adapter wall 1 53 is adjacent to the inner wall 1 214, the notch adapter wall 2 54 is adjacent to the inner wall 2 215, the side of the control plate 5 opposite to the notch adapter wall 1 53 is adjacent to the outer wall 1 212, and the side of the control plate 5 opposite to the notch adapter wall 2 54 is adjacent to the outer wall 213. Both the transmitter 3 and the receiver 4 are LED beads with pins. The inner sidewall 214 and the inner sidewall 215 of the control board 5 are respectively provided with LED bead mounting slots 55. The bottom end of the LED bead contacts the bottom 551 of the mounting slot 55. The pins of the LED bead are soldered to the control board 5 and are designed to accommodate the shortest pin of the LED bead to be soldered to the control board 5. The width from the LED bead mounting slot 55 on the inner sidewall 214 to the outer sidewall 212 is the optimal width for the shortest pin to be soldered and installed. The width from the LED bead mounting slot 55 on the inner sidewall 215 to the outer sidewall 213 is designed to accommodate the shortest pin to be soldered and installed. The control board 5 can be fitted into the U-shaped cavity of the housing 2, so that the size of the housing 2 is not affected by the installation of the control board 5. At the same time, the size of the notch of the housing 2 can be changed with the size of the control board 5. Thus, when both the transmitter 3 and the receiver 4 use LED beads, the circuit board is simultaneously designed with LED bead mounting slots 55 for mounting LED beads. At the same time, the LED bead pins are also the shortest pins soldered to the control board 5. This ensures that the outward V-shaped slot of the signal detection port 10 of the yarn breakage sensor involved in this utility model can be maximized. Even if the yarn swing space is widened to the maximum, the current fluctuation amplitude can also be maximized. Once the yarn breaks, the difference in the sudden drop of the current to 0 is particularly significant. This also allows the yarn breakage sensor to capture signal changes more quickly when working, thereby ensuring accurate determination of the yarn breakage stage and making the yarn breakage sensor more sensitive.

[0017] like Figure 1 , 3 As shown in Figures 4 and 6, two mounting holes 40 are formed on the housing 2 at the end furthest from the notch. A mounting base 1 with a 32-size connection hole 12 and a 36-size or 37-size seat hole 11 is optionally fitted on the end of the housing 2 relative to the end with the two mounting holes 40. The two mounting holes 40 allow the broken yarn sensor to be adapted to a 32-size installation. The 32-size connection hole 12 is connected to the two mounting holes 40 respectively, and the mounting base 1 allows the broken yarn sensor to be adapted to a 36-size or 37-size installation. This design allows the broken yarn sensor involved in this utility model to meet the requirements of most of the replacements on the market, namely the installation of the French 37-size sensor, the installation of the domestic 36-size sensor, and the installation of the broken yarn sensor involved in this utility model itself with a 32-size sensor, thereby greatly improving the installation applicability of this utility model.

[0018] like Figure 7-9 As shown, the housing 2 includes a bottom shell 211 for the distribution of a U-shaped cavity, and a cover plate 22 that is placed on and connected to the bottom shell 211. The connection between the bottom shell 211 and the cover plate 22 is an ultrasonically treated structure. The control board 5 is a control board 5 with conformal coating protection, and a potting hole is provided on the bottom side of the bottom shell 211. Potting is performed through the potting hole to form a potting design in the U-shaped cavity. This allows the broken yarn sensor of this utility model to have its protection greatly improved through the control board 5 with conformal coating protection, the potting design, and the ultrasonic treatment.

[0019] like Figure 7 , 9As shown, the sensor body also includes a status indicator light 6 with red and green light indication. The status indicator light 6 is distributed inside the housing 2 and forms an electrical connection with the control board 5. The top of the status indicator light 6 extends out of the housing 2 and is exposed at the notch position of the housing 2. The status indicator light 6 forms a green light indication for the working stage of the yarn breakage sensor or a red light indication for the stop stage of the yarn breakage sensor. The design of the status indicator light 6 being distributed at the bottom of the notch position allows the yarn breakage sensor involved in this utility model to achieve reliable control during use through the function of dual-color lights, i.e., red light for stop and green light for stop. Compared with the existing method of lighting up when working and not lighting up when stopping, its control indication is more reliable and easier for users to identify, and it is less likely to misjudge whether it is damaged.

Claims

1. A yarn breakage sensor, comprising a sensor body with a built-in control board, wherein the sensor body includes a signal detection port distributed at one end of the sensor body, and a transmitter and a receiver connected to the control board and forming a signal receiving and feedback mechanism via the control board, characterized in that: The signal detection port has a wide-slot bidirectional outward expansion structure. The wide-slot bidirectional outward expansion signal detection port includes an expansion wall 1 and an expansion wall 2 that extend outward in opposite directions. The transmitting end is distributed in the sensor body, and the end of the transmitting end extends out at the position of the expansion wall 1. The receiving end is distributed in the sensor body, and the end of the receiving end extends out at the position of the expansion wall 2. The ends of the transmitting end and the ends of the receiving end are distributed opposite to each other.

2. The yarn breakage sensor according to claim 1, characterized in that: The sensor body includes a housing. Notches for signal detection ports are distributed on one side of the housing. A cavity with a U-shape is formed inside the housing. The U-shaped cavity includes an inner wall 1 and an inner wall 2 distributed in the direction of the notch, and an outer wall 1 and an outer wall 2 opposite to the inner wall 1. The control board has a notch adapter wall 1 and a notch adapter wall 2. The control board is placed in the U-shaped cavity. The notch adapter wall 1 is adjacent to the inner wall 1, the notch adapter wall 2 is adjacent to the inner wall 2, the side of the control board opposite to the notch adapter wall 1 is adjacent to the outer wall 1, and the side of the control board opposite to the notch adapter wall 2 is adjacent to the outer wall 2. Both the transmitting and receiving ends are LED beads with pins. The inner wall 1 and inner wall 2 of the control board are respectively provided with LED bead mounting slots. The bottom end of the LED bead contacts the bottom of the mounting slot. The pins of the LED bead are soldered to the control board and are the shortest pins that can be soldered to the control board. The width from the LED bead mounting slot on inner wall 1 to outer wall 1 is the optimal width for soldering and installing the shortest pin. The width from the LED bead mounting slot on inner wall 2 to outer wall 2 is the optimal width for soldering and installing the shortest pin.

3. The yarn breakage sensor according to claim 2, characterized in that: The housing has two mounting holes at the end furthest from the notch, and a mounting base with a 32-gauge connection hole and a 36-gauge or 37-gauge seat hole is optionally fitted at the end of the housing with the two mounting holes. The two mounting holes allow the broken yarn sensor to be compatible with a 32-gauge mounting. The 32-gauge connection hole is connected to the two mounting holes respectively, and the mounting base allows the broken yarn sensor to be compatible with a 36-gauge or 37-gauge mounting.

4. The yarn breakage sensor according to claim 2 or 3, characterized in that: The housing includes a bottom shell for the distribution of the U-shaped cavity and a cover plate that is placed on and connected to the bottom shell. The connection between the bottom shell and the cover plate is an ultrasonically treated structure. The control board is a control board with conformal coating protection. The bottom side of the bottom shell has a potting hole. Potting is performed through the potting hole to form potting in the U-shaped cavity.

5. The yarn breakage sensor according to claim 2 or 3, characterized in that: The sensor body also includes status indicator lights with red and green light indication. The status indicator lights are distributed inside the housing and are electrically connected to the control board. The top of the status indicator light extends out of the housing and is exposed at the notch of the housing. The status indicator lights can be used to indicate the working stage of the yarn breakage sensor with a green light or the stopping stage with a red light.

6. The yarn breakage sensor according to claim 5, characterized in that: The status indicator lights are located at the bottom of the notch.

7. The yarn breakage sensor according to claim 1, 2, 3 or 6, characterized in that: The wide-slot bidirectional outward-expanding signal detection port is a figure-eight slot type signal detection port.

Images