Yarn hairiness detector
Through laser grating technology and signal processing circuits, efficient and real-time detection of yarn hairs is achieved, and the problem of low detection accuracy in the existing technology is solved, real-time feedback and counting of yarn hairs is provided, and the quality control of textile production is improved.
Patent Information
- Application Number
- CN202422598966.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-10-28
AI Technical Summary
The existing yarn hair detection technology has low accuracy and is difficult to achieve efficient and real-time detection, which makes it difficult to detect yarn quality problems in textile production in time.
Laser grating technology is used to combine precision optical components and signal processing circuits to detect yarn hairs through the transmitting and receiving components, and the large hairs and small hairs signal processing circuits are used for real-time and accurate detection, and the results are displayed through counters and indicator lights.
It realizes high resolution and real-time detection of yarn hairs, which can accurately distinguish between small hairs and large hairs, provide real-time feedback and counting, and help operators adjust production processes in a timely manner.
Smart Images
Figure CN223284624U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of textile technology, and in particular to a yarn hairiness detector. Background Art
[0002] Yarn hairiness refers to the fiber ends or loops protruding from the yarn surface. It has a direct impact on the appearance and quality of textiles. With the continuous development of the textile industry, controlling yarn hairiness has become a key factor in improving textile quality. The presence of yarn hairiness not only affects the yarn's appearance but also increases the yarn breakage rate during the weaving process, further affecting the fabric's uniformity, dyeing and printing quality, and even causing problems such as fuzzing and pilling. The amount and distribution of yarn hairiness not only affects the fabric's gloss and feel but also increases the probability of defects during the weaving process. Therefore, accurate detection and control of yarn hairiness is crucial in textile production.
[0003] Currently, yarn hairiness detection primarily relies on traditional infrared sensor technology. While these sensors can detect yarn hairiness to a certain extent, they are complex to debug, have low detection accuracy, and are limited by the invisible nature of infrared light, making efficient hairiness detection difficult in practice. Furthermore, many front-end textile equipment, such as warping machines, lack online, real-time detection capabilities for yarn hairiness. This prevents yarn hairiness issues from being detected early in the textile production process, thus impacting final product quality.
[0004] In summary, how to efficiently and in real time detect the hairiness of yarn during the textile production process is a current challenge. Utility Model Content
[0005] In order to efficiently and in real time detect the hairiness of yarns during the textile production process, the present application provides a yarn hairiness detector. The present application provides the following technical solutions:
[0006] A yarn hairiness detector comprises a sensor frame, a transmitting assembly, a receiving assembly and a control box, wherein the transmitting assembly and the receiving assembly are respectively mounted at both ends of the sensor frame, and a wire guide rod for yarn to pass through is mounted on the sensor frame; the transmitting assembly is used to emit a laser beam, and the receiving assembly is used to receive the laser beam emitted by the transmitting assembly and transmit it to the control box; a large hairiness signal processing circuit, a small hairiness signal processing circuit and a logic signal processor are provided in the control box, the input end of the large hairiness signal processing circuit and the input end of the small hairiness signal processing circuit are both connected to the output end of the receiving assembly, and the output end of the large hairiness signal processing circuit and the output end of the small hairiness signal processing circuit are both connected to the input end of the logic signal processor, and the logic signal processor receives signals from two paths and outputs a control signal; the transmitting assembly, the receiving assembly and the control box are all connected to a power supply.
[0007] In a specific possible implementation scheme, the emitting assembly includes a transmitter head base, a laser transmitter head, a transmitter head frame, a light spot projection and a focusing lens. The transmitter head base is installed at one end of the sensor frame, the laser transmitter head is installed on the transmitter head base, the transmitter head frame is arranged on the transmitter head base and is located on the outside of the laser transmitter head. The light spot projection is installed at one end of the transmitter head frame away from the laser transmitter head in the vertical direction, the focusing lens is installed in the middle part of the transmitter head frame in the vertical direction, and the focusing lens is located between the laser transmitter head and the light spot projection.
[0008] In a specific implementation scheme, the receiving component includes a PD sensor and a first amplifying circuit, the output end of the PD sensor is connected to the input end of the first amplifying circuit, and the output end of the first amplifying circuit is connected to the control box via a cable.
[0009] In a specific embodiment, the large hairiness signal processing circuit is composed of a large hairiness amplification circuit, a large hairiness filtering circuit and a large hairiness comparator.
[0010] In a specific implementation manner, the small hairiness signal processing circuit is composed of a small hairiness amplification circuit, a small hairiness filtering circuit, and a small hairiness comparator.
[0011] In a specific possible implementation manner, the large hairiness signal processing circuit and the small hairiness signal processing circuit are both connected to potentiometers, and the potentiometers are installed outside the control box.
[0012] In a specific implementation manner, the output end of the large hairiness signal processing circuit and the output end of the small hairiness signal processing circuit are respectively connected to corresponding counters, and the counters are used to record the number of hairinesses that pass the detection.
[0013] In a specific implementation scheme, the output end of the large hairiness signal processing circuit and the output end of the small hairiness signal processing circuit are respectively connected to a large hairiness indicator and a small hairiness indicator, and the large hairiness indicator and the small hairiness indicator are used to display the detection results in real time.
[0014] In summary, the beneficial effects of this application include at least:
[0015] 1) Laser grating technology, combined with precision optical components (such as focusing lenses and spot projections), generates a high-resolution grating beam, ensuring accurate detection. When yarn passes through the laser grating, its hairiness interrupts the beam, generating signal variations. Due to the precise focusing of the grating, these variations accurately reflect the characteristics of the yarn hairiness, distinguishing both small and large hairiness.
[0016] 2) The large and small hairiness processing circuits in the control box are connected to a counter and indicator light, respectively, providing real-time detection feedback. The counter records the number of hairinesses that pass detection, counting the number of large and small hairinesses separately. This allows the operator to intuitively understand the frequency and amount of hairiness during production, facilitating timely adjustments to the production process.
[0017] 3) A potentiometer mounted on the front panel of the control box allows the operator to manually adjust the system's sensitivity to suit different yarn and process requirements. This sensitivity adjustment affects the comparator threshold setting, allowing the system to be tailored to suit various textile production environments, depending on yarn characteristics, hairiness, or production requirements.
[0018] By assembling a sensor frame, a transmitter assembly, a receiver assembly, and a control box, the system utilizes laser grating transmission and reception, combined with amplification, filtering, and comparator circuits, to achieve real-time, accurate detection of yarn hairiness. The transmitter assembly scans the yarn using a laser grating. When yarn hairiness passes through, it interrupts the grating. The receiver assembly amplifies this signal and transmits it to the control box. The control box processes the signals of different hairiness sizes using large and small hairiness signal processing circuits, respectively, and displays the detection results through a counter and indicator light. A potentiometer for adjusting sensitivity allows the user to flexibly set the detection threshold, ensuring system adaptability.
[0019] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application and to implement it in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 4 is a structural block diagram of the yarn hairiness detector in this embodiment.
[0021] Figure 2 It is a schematic diagram of the structure of the transmitting component and the receiving component in this embodiment.
[0022] Figure numerals: 1. sensor rack; 2. transmitting assembly; 21. transmitting head base; 22. laser transmitting head; 23. transmitting head frame; 24. focusing lens; 25. spot projection; 3. receiving assembly; 31. PD sensor; 32. first amplifying circuit; 4. guide wire rod; 5. control box. DETAILED DESCRIPTION
[0023] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0024] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0025] As used herein, the terms "comprise," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.
[0026] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0027] An embodiment of the present application discloses a yarn hairiness detector.
[0028] Reference Figure 1The yarn hairiness detector consists of a sensor frame, a transmitter assembly, a receiver assembly, and a control box. The transmitter and receiver assemblies are mounted at either end of the sensor frame. The sensor frame is equipped with two wire guides for the yarn to pass through. The wire guides are hardened and polished to protect the yarn from wear during long-term testing. The sensor frame is constructed of European standard 6060 aluminum profiles. The sensor length ranges from 1.2m to 2.6m, depending on the machine length selected by the user. The two wire guides are positioned side by side between the transmitter and receiver assemblies. The transmitter, receiver, and control box are all connected to a power supply.
[0029] Reference Figure 1 and Figure 2 The transmitting assembly includes a transmitter head base, a laser transmitter head, a transmitter head frame, a spot projection and a focusing lens. The transmitter head base is installed at one end of the sensor frame, the laser transmitter head is installed on the transmitter head base, and the transmitter head frame is arranged on the transmitter head base and is located on the outside of the laser transmitter head. The overall shape is U-shaped. The spot projection is installed in the vertical direction at the end of the transmitter head frame away from the laser transmitter head. The focusing lens is installed in the vertical direction in the middle part of the transmitter head frame and is located between the laser transmitter head and the spot projection. It focuses the laser beam emitted by the laser transmitter head so that it is accurately imaged at the spot projection, ensuring the clarity and accuracy of the grating. This can improve the accuracy of hairiness detection and ensure that the laser beam does not scatter too much when passing through the yarn. The laser transmitter head emits two 2×10mm laser gratings to the receiving assembly by focusing and projecting. It should be noted that Figure 2 The dashed line in the figure represents the laser beam. In summary, the transmitting component emits and focuses the laser grating, causing yarn hairiness to interrupt the grating as it passes through, generating signal changes. These signals are detected by the receiving component and transmitted to the control box, which then processes and counts the size and number of the hairiness.
[0030] Reference Figure 1 and Figure 2 The receiving component includes a PD sensor and a first amplifier circuit (AMP). The signal received by the PD sensor passes through the amplifier circuit and is then transmitted to the control box via a cable. Specifically, after receiving the laser signal, the PD sensor converts it into a weak electrical signal. The input end of the first amplifier circuit (AMP) is connected to the output end of the PD sensor to amplify the weak electrical signal output by the sensor. The cable connects the first amplifier circuit and the control box to transmit the amplified signal to the control box.
[0031] Reference Figure 1The control box includes a large hairiness signal processing circuit, a small hairiness signal processing circuit, and a logic signal processor. The inputs of the large hairiness signal processing circuit and the small hairiness signal processing circuit are connected to the cable of the receiving component, while the outputs of the large hairiness signal processing circuit and the small hairiness signal processing circuit are connected to the input of the logic signal processor. The logic signal processor receives the processing results of the two signals and outputs control signals such as reset and stop signals. The test switch on the front panel also enables system self-test.
[0032] The large hairiness signal processing circuit receives and processes signals from the receiving assembly to determine the number of large hairinesses on the yarn. This circuit comprises a large hairiness amplifier circuit, a large hairiness filter circuit, and a large hairiness comparator. The large hairiness amplifier circuit further amplifies the signal from the receiving assembly, boosting its strength to an appropriate level for subsequent processing. The large hairiness filter circuit filters out noise and unnecessary interference signals from the signal, ensuring accurate processing. The large hairiness comparator compares the amplified and filtered signal with a preset threshold to determine whether it represents large hairiness. The small hairiness signal processing circuit receives and processes signals from the receiving assembly to determine the number of small hairinesses on the yarn. This circuit comprises a small hairiness amplifier circuit, a small hairiness filter circuit, and a small hairiness comparator. The small hairiness amplifier circuit further amplifies the signal from the receiving assembly, boosting its strength to an appropriate level for subsequent processing. The small hairiness filter circuit filters out noise and unnecessary interference signals from the signal, ensuring accurate processing. The small hairiness comparator compares the amplified and filtered signal with a preset threshold to determine whether it is small hairiness.
[0033] It should be noted that the large hairiness signal processing circuit, small hairiness signal processing circuit, and logic signal processor described in this application are all common components in the prior art and are widely used in signal processing systems. Specifically, the large hairiness signal processing circuit and the small hairiness signal processing circuit are used to amplify, filter, and perform threshold comparison on the electrical signals from the receiving component, determining and outputting hairiness signals with different characteristics. These two circuits primarily consist of an amplifier circuit, a filter circuit, and a comparator, and their functions are relatively common in the prior art. For example, in industrial sensor detection systems, similar signal processing circuits are often used to separate, enhance, and suppress noise from input signals. The amplifier circuit uses a general-purpose operational amplifier, such as the LM358 or AD620. The filter circuit is implemented using a resistor-capacitor (RC) network or active filter. The comparator circuit uses a dedicated comparator chip, such as the LM393. This chip outputs a high-level signal when the signal reaches a preset threshold to determine whether large or small hairiness is detected. The logic signal processor is responsible for receiving the output signals of the large and small hairiness signal processing circuits, performing further logical judgments, and generating control signals such as reset and stop signals. It is implemented using a microcontroller (MCU) and is programmed to process input signals and generate corresponding output control signals.
[0034] Reference Figure 1 Both the large and small hairiness signal processing circuits are connected to potentiometers, which adjust the reference voltage or signal gain of the large or small hairiness comparator, thereby varying the system's detection sensitivity. The sensitivity adjustment potentiometers are mounted on the front panel of the control box, allowing the operator to set the detection threshold via knob adjustment. Furthermore, the outputs of the large and small hairiness signal processing circuits are each connected to a corresponding counter, which records the number of hairs that pass detection and counts the occurrences of large and small hairiness, respectively. Furthermore, the outputs of the large and small hairiness signal processing circuits are connected to large and small hairiness indicators, respectively. These indicators are connected to the outputs of the large and small hairiness signal processing circuits to display the detection results in real time.
[0035] In summary, this application achieves real-time, accurate detection of yarn hairiness by arranging a sensor frame, a transmitting assembly, a receiving assembly, and a control box. This utilizes the transmission and reception of a laser grating, combined with amplification, filtering, and comparator circuits. The transmitting assembly scans the yarn using a laser grating. When yarn hairiness passes through, it interrupts the grating. The receiving assembly amplifies this signal and transmits it to the control box. The control box processes the signals of different hairiness sizes using large and small hairiness signal processing circuits, respectively, and displays the detection results through a counter and indicator light. A potentiometer for adjusting the sensitivity allows the user to flexibly set the detection threshold, ensuring system adaptability.
[0036] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. A yarn hairiness detector, characterized in that: The invention comprises a sensor frame, a transmitting assembly, a receiving assembly and a control box, wherein the transmitting assembly and the receiving assembly are respectively mounted at both ends of the sensor frame, and a wire guide rod for yarn to pass through is mounted on the sensor frame; the transmitting assembly is used to emit a laser beam, and the receiving assembly is used to receive the laser beam emitted by the transmitting assembly and transmit it to the control box; a large hairiness signal processing circuit, a small hairiness signal processing circuit and a logic signal processor are arranged in the control box, the input end of the large hairiness signal processing circuit and the input end of the small hairiness signal processing circuit are both connected to the output end of the receiving assembly, and the output end of the large hairiness signal processing circuit and the output end of the small hairiness signal processing circuit are both connected to the input end of the logic signal processor, and the logic signal processor receives signals from two paths and outputs a control signal; the transmitting assembly, the receiving assembly and the control box are all connected to a power supply.
2. The yarn hairiness detector according to claim 1, characterized in that The transmitting assembly includes a transmitting head base, a laser transmitting head, a transmitting head frame, a light spot projection and a focusing lens. The transmitting head base is installed at one end of the sensor frame, the laser transmitting head is installed on the transmitting head base, the transmitting head frame is arranged on the transmitting head base and is located on the outside of the laser transmitting head. The light spot projection is installed at one end of the transmitting head frame away from the laser transmitting head in the vertical direction, and the focusing lens is installed in the middle part of the transmitting head frame in the vertical direction. The focusing lens is located between the laser transmitting head and the light spot projection.
3. The yarn hairiness detector according to claim 1, characterized in that The receiving component includes a PD sensor and a first amplifying circuit. The output end of the PD sensor is connected to the input end of the first amplifying circuit. The output end of the first amplifying circuit is connected to the control box via a cable.
4. The yarn hairiness detector according to claim 1, characterized in that The large hairiness signal processing circuit is composed of a large hairiness amplifying circuit, a large hairiness filtering circuit and a large hairiness comparator.
5. The yarn hairiness detector according to claim 1, characterized in that The small hairiness signal processing circuit is composed of a small hairiness amplifying circuit, a small hairiness filtering circuit and a small hairiness comparator.
6. The yarn hairiness detector according to claim 1, characterized in that: The large hairiness signal processing circuit and the small hairiness signal processing circuit are both connected to potentiometers, and the potentiometers are installed outside the control box.
7. The yarn hairiness detector according to claim 1, characterized in that The output end of the large hairiness signal processing circuit and the output end of the small hairiness signal processing circuit are respectively connected to corresponding counters, and the counters are used to record the number of hairinesses that pass the detection.
8. The yarn hairiness detector according to claim 1, characterized in that: The output end of the large hairiness signal processing circuit and the output end of the small hairiness signal processing circuit are respectively connected to a large hairiness indicator light and a small hairiness indicator light, and the large hairiness indicator light and the small hairiness indicator light are used to display the detection result in real time.