A broken end detection system

Abstract

The utility model discloses a yarn breakage detection system, this system passes through the design that two light paths cooperated detection and multistage signal processing combined, including transmitting unit, receiving unit, processing module and optional communication interface, transmitting unit and receiving unit constitute the detection light path and reference light path of covering yarn running area, and processing module realizes accurate yarn breakage identification through signal conditioning, filter, amplification, difference calculation and double threshold determination. This system can effectively resist the interference of environmental light, dust, yarn shaking, is suitable for different material thickness yarn and all kinds of textile equipment, significantly improves detection stability and accuracy, reduces the false alarm and the missing report probability, is convenient for integrated to the existing production line.

Description

Technical Field

[0001] This utility model relates to textile equipment testing technology, and in particular to a yarn breakage detection system, which is suitable for real-time monitoring of yarn running status in textile production. It can be linked with various textile equipment control systems to ensure production continuity and product quality. Background Technology

[0002] In the textile production process, yarn breakage is a common production anomaly. If it is not detected and dealt with in time, it will lead to defects such as missing weft and broken warp in the fabric, which will seriously affect product quality and cause waste of raw materials. Therefore, yarn breakage detection is a key link to ensure production efficiency and product qualification rate.

[0003] Existing yarn breakage detection technologies have the following main shortcomings:

[0004] Weak anti-interference capability: Traditional single-path photoelectric detection solutions are easily affected by the environment of textile workshops. Ambient light generated by a large number of lighting devices in the workshop, as well as floating fibers and dust, can cause fluctuations in the light signal received by the photoelectric sensor. At the same time, the shaking of the yarn during operation will generate high-frequency noise, which will further aggravate the signal instability and easily lead to misjudgment (misjudging normal yarn as broken yarn) or missed judgment (broken yarn is not identified).

[0005] Insufficient detection accuracy: Some dual-optical-path solutions only use the "reference optical path" to cancel ambient light interference, and the core detection still relies on a single path (detection optical path), failing to fully utilize the synergistic effect of the dual optical paths; moreover, different yarns (such as cotton, chemical fiber, roving, and fine yarn) have large differences in material and thickness, and different characteristics of light blocking and reflection. Existing solutions lack targeted signal adaptation capabilities, resulting in inconsistent detection accuracy for various yarns.

[0006] Poor adaptability: The detection thresholds and signal amplification factors of existing systems are mostly fixed values, making it difficult to adapt to different types of textile equipment (such as looms and spinning machines); and there is a lack of standardized communication interfaces, making integration with existing textile equipment control systems difficult and unable to flexibly meet the needs of different production processes.

[0007] To address the aforementioned issues, there is an urgent need for a yarn breakage detection system that can balance anti-interference capabilities, detection accuracy, and adaptability, in order to solve the technical pain points in textile production such as "instability affected by environmental interference, accuracy limited by single path, and poor adaptability of fixed parameters". Utility Model Content

[0008] To overcome the shortcomings of the existing technology, the present invention aims to provide a yarn detection system that improves the system's anti-interference capability, resists the influence of ambient light, dust, and yarn vibration on the detection signal, and ensures detection stability in complex workshop environments; fully utilizes dual optical paths to achieve collaborative detection, and combines multi-level signal processing and dual-condition judgment to improve the detection accuracy of yarns of different materials and thicknesses, and reduce false alarms and missed alarms; enhances the system's adaptability by integrating with different textile equipment and adapting to diverse production processes through adjustable parameters and standardized interface design.

[0009] To achieve the above and other related objectives, the technical solution provided by this utility model is: a yarn breakage detection system, comprising a transmitting unit, a receiving unit, and a processing module; the transmitting unit consists of a detection optical path light-emitting diode and a reference optical path light-emitting diode; the receiving unit consists of two sets of photodetectors, each corresponding to the detection optical path light-emitting diode and the reference optical path light-emitting diode, and the two sets of optical paths jointly cover the yarn running area; the processing module integrates a signal conditioning circuit, an RC filter circuit, a signal amplification circuit, a difference calculation circuit, a threshold comparison circuit, and a shaping circuit; the two sets of photodetectors convert the optical signal into an electrical signal and input it into the signal conditioning circuit, where it is denoised by the RC filter circuit and amplified by the signal amplification circuit, and then input into the difference calculation circuit and the threshold comparison circuit, respectively; the difference calculation circuit calculates the difference between the two sets of electrical signals, and the threshold comparison circuit determines whether a single electrical signal exceeds a set threshold; when a single electrical signal exceeds the threshold and the difference between the two sets of signals exceeds a preset difference threshold, a yarn breakage is determined, and the yarn breakage signal is processed by the shaping circuit and output as a standard digital signal.

[0010] A preferred technical solution is as follows: it further includes a communication interface, which is connected to the shaping circuit. The communication interface is an RS-485 interface used for communication with the textile equipment control system.

[0011] The preferred technical solution is as follows: the signal amplification circuit adopts an operational amplifier, the operational amplifier is connected to an external feedback resistor network, and the amplification factor is controlled by adjusting the resistance value of the feedback resistor.

[0012] The preferred technical solution is that the difference calculation circuit is composed of an operational amplifier II, which is used to output the difference between the detection optical path electrical signal and the reference optical path electrical signal.

[0013] The preferred technical solution is that the threshold of the threshold comparison circuit is set by a voltage regulator, and the threshold can be adjusted according to the yarn characteristics.

[0014] A preferred technical solution is that it further includes an adjustable mounting bracket, which is used to fix the transmitting unit and the receiving unit and adjust the relative positions of the two sets of optical paths and the yarn running area.

[0015] Due to the application of the above technical solution, the beneficial effects of this utility model are as follows:

[0016] This utility model discloses a yarn breakage detection system. The system combines dual-optical-path collaborative detection with multi-level signal processing, including a transmitting unit, a receiving unit, a processing module, and an optional communication interface. The transmitting and receiving units form a detection optical path and a reference optical path covering the yarn running area. The processing module achieves accurate yarn breakage identification through signal conditioning, filtering, amplification, difference calculation, and dual threshold determination. This system effectively resists interference from ambient light, dust, and yarn vibration, is adaptable to yarns of different materials and thicknesses, and various textile equipment, significantly improving detection stability and accuracy, reducing the probability of false alarms and missed alarms, and facilitating integration into existing production lines. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the system involved in this utility model. Detailed Implementation

[0018] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0019] Please see Figure 1 It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Example:

[0022] like Figure 1 As shown, according to the overall technical concept of this utility model, a yarn breakage detection system is provided, including a transmitting unit 1, a receiving unit 2, and a processing module 3; the transmitting unit 1 consists of a detection optical path light-emitting diode and a reference optical path light-emitting diode; the receiving unit 2 consists of two sets of photodetectors, which correspond to the detection optical path light-emitting diode and the reference optical path light-emitting diode respectively, and the two sets of optical paths jointly cover the yarn running area; the processing module 3 integrates a signal conditioning circuit 31, an RC filter circuit 32, a signal amplification circuit 33, a difference calculation circuit 34, and a threshold circuit. The system includes a comparison circuit 35 and a shaping circuit 36. After the two sets of photodetectors convert the light signals into electrical signals, they are input into the signal conditioning circuit 31. After noise reduction by the RC filter circuit 32 and amplification by the signal amplification circuit 33, they are input into the difference calculation circuit 34 and the threshold comparison circuit 35, respectively. The difference calculation circuit 34 calculates the difference between the two sets of electrical signals, and the threshold comparison circuit 35 determines whether a single electrical signal exceeds a set threshold. When a single electrical signal exceeds the threshold and the difference between the two sets of signals exceeds the preset difference threshold, it is determined that the yarn is broken. The yarn breakage signal is processed by the shaping circuit 36 ​​and output as a standard digital signal.

[0023] like Figure 1 As shown, in an exemplary embodiment of this utility model, a communication interface 4 is also included. The communication interface 4 is connected to the shaping circuit 36. The communication interface 4 is an RS-485 interface used for communication with the textile equipment control system.

[0024] like Figure 1 As shown, in an exemplary embodiment of this utility model, the signal amplification circuit 33 employs an operational amplifier, which is connected to an external feedback resistor network. The amplification factor is controlled by adjusting the resistance value of the feedback resistor.

[0025] like Figure 1 As shown, in an exemplary embodiment of this utility model, the difference calculation circuit 34 is composed of an operational amplifier II, used to output the difference between the detection optical path electrical signal and the reference optical path electrical signal.

[0026] like Figure 1As shown, in an exemplary embodiment of this utility model, the threshold of the threshold comparison circuit 35 is set by a voltage regulator, and the threshold can be adjusted according to the yarn characteristics.

[0027] like Figure 1 As shown, in an exemplary embodiment of this utility model, an adjustable mounting bracket is also included. The adjustable mounting bracket is used to fix the transmitting unit 1 and the receiving unit 2, and to adjust the relative positions of the two sets of optical paths and the yarn running area.

[0028] Therefore, this utility model has the following advantages:

[0029] Significantly enhanced anti-interference capability: The system compensates for common interference from ambient light and dust by using "dual optical path difference calculation", eliminates high-frequency noise from yarn vibration by using "RC filter circuit", and filters single-path abnormal signals by using "independent threshold comparison". This triple anti-interference design ensures stable operation of the system in complex workshop environments.

[0030] The detection accuracy is greatly improved: the "dual optical path collaborative detection + dual condition judgment" (signal exceeding threshold + difference exceeding threshold) is adopted, which not only covers the "intensity change" of yarn obstruction, but also captures the "difference change" of the two optical paths. It can accurately identify the yarn breakage status of yarns of different materials and thicknesses, and greatly reduce the false alarm rate and false alarm rate.

[0031] Adaptability is flexible and diverse: By adjusting the amplification factor through the feedback resistor network and adjusting the threshold and differential threshold of the voltage regulator, it can be adapted to different yarns such as cotton, chemical fiber, roving, and fine yarn; with the help of the adjustable mounting bracket and RS-485 communication interface, it can be integrated with various textile equipment such as looms and spinning machines without the need for large-scale modification of existing production lines.

[0032] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A yarn breakage detection system, characterized in that, The system includes a transmitting unit, a receiving unit, and a processing module. The transmitting unit consists of a detection optical path light-emitting diode (LED) and a reference optical path light-emitting diode (LED). The receiving unit consists of two sets of photodetectors, each corresponding to one of the LEDs in the detection optical path and the other in the reference optical path, with both sets of optical paths covering the yarn running area. The processing module integrates a signal conditioning circuit, an RC filter circuit, a signal amplification circuit, a difference calculation circuit, a threshold comparison circuit, and a shaping circuit. The two sets of photodetectors convert the optical signal into an electrical signal, which is then input to the signal conditioning circuit. After noise reduction by the RC filter circuit and amplification by the signal amplification circuit, the signal is input to the difference calculation circuit and the threshold comparison circuit, respectively. The difference calculation circuit calculates the difference between the two sets of electrical signals, and the threshold comparison circuit determines whether a single electrical signal exceeds a set threshold. When a single electrical signal exceeds the threshold and the difference between two sets of signals exceeds the preset difference threshold, it is determined to be a yarn breakage. The yarn breakage signal is processed by the shaping circuit and output as a standard digital signal.

2. The yarn breakage detection system according to claim 1, characterized in that: It also includes a communication interface, which is connected to the shaping circuit. The communication interface is an RS-485 interface used to communicate with the textile equipment control system.

3. The yarn breakage detection system according to claim 1, characterized in that: The signal amplification circuit uses operational amplifier one, which is connected to an external feedback resistor network. The amplification factor is controlled by adjusting the resistance value of the feedback resistor.

4. The yarn breakage detection system according to claim 1, characterized in that: The difference calculation circuit is composed of operational amplifier II and is used to output the difference between the detection optical path electrical signal and the reference optical path electrical signal.

5. The yarn breakage detection system according to claim 1, characterized in that: The threshold of the threshold comparison circuit is set by a voltage regulator, and the threshold can be adjusted according to the yarn characteristics.

6. The yarn breakage detection system according to claim 1, characterized in that: It also includes an adjustable mounting bracket, which is used to fix the transmitting unit and the receiving unit and adjust the relative positions of the two sets of optical paths and the yarn running area.

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