An intelligent photoelectric sensor applicable to yarn tail detection

Abstract

The application discloses an intelligent photoelectric sensor applicable to yarn tail detection, solves the problems of easy false detection, inconvenient cleaning of internal optical elements, low detection precision and unreliable detection results of the existing tail detection device, and the technical scheme is as follows: the intelligent photoelectric sensor comprises an upper cover, a transmitting tube, a receiving tube, a circuit board and a bottom shell, further comprises a ceramic fixing frame mounted on the bottom shell, an elliptical guide ceramic arranged on the upper cover and horizontally arranged along a long axis, a circular ceramic arranged on the ceramic fixing frame, ceramic holes in the circular ceramic and the elliptical guide ceramic which are connected with each other, a dust cover mounted on the bottom shell for dust prevention, and a self-gain adjusting circuit for signal detection and sensitivity adjustment, and the intelligent photoelectric sensor has high detection precision and simple structure.

Description

TECHNICAL FIELD

[0001] The application relates to a textile detection technology, in particular to an intelligent photoelectric sensor applicable to yarn tail detection. BACKGROUND

[0002] A texturing machine is one of important production equipment in our textile industry, and working principles of various types of texturing machines are roughly the same. The tail information monitoring of the texturing machine is seriously dependent on the intervention of operators. Nowadays, various enterprises are faced with the situation of difficulty in recruitment of personnel and difficulty in training of professional and technical personnel. The stable production of the texturing machine and the monitoring of the tail signal need to be broken through.

[0003] The Chinese utility model patent with the application number CN202022184316.4 discloses a device applied to yarn tail detection, which integrates two pairs of photoelectric opposite-acting sensors in one product, detects the yarn tail behavior of yarn according to the twisting of the yarn on one side and then the twisting of the yarn on the other side, judges the yarn knot, removes the knot, and improves the quality grade of the yarn.

[0004] However, the device still has defects. Since the guide ceramic embedded in the upper cover is circular, false detection is caused when a large roll is twisted. In addition, due to the design of the structure, the optical product is concave in the device, dust is easily accumulated, the device is inconvenient to clean, the signal is easily shielded, the detection accuracy is affected, the detection accuracy is reduced, the detection result is unreliable, and the tail monitoring is affected. SUMMARY

[0005] The application aims to provide an intelligent photoelectric sensor applicable to yarn tail detection, which has high detection accuracy and simple structure.

[0006] The above technical purpose of the application is achieved by the following technical scheme.

[0007] An intelligent photoelectric sensor applicable to yarn tail detection, comprising an upper cover, a transmitting tube and a receiving tube, a circuit board and a bottom shell, further comprising

[0008] A ceramic fixing frame mounted on the bottom shell;

[0009] An elliptical guide ceramic arranged on the upper cover and having a horizontal long axis;

[0010] A circular ceramic arranged on the ceramic fixing frame, wherein the circular ceramic and the elliptical guide ceramic are provided with ceramic holes in communication;

[0011] A dustproof cover mounted on the bottom shell for dust prevention;

[0012] A self-gain adjusting circuit for signal detection and sensitivity adjustment is further arranged.

[0013] Preferably, the dust cover is provided with a mounting hole for mounting the emitting tube, and two light transmission surfaces corresponding to the two receiving tubes are symmetrically arranged on the upper side of the dust cover.

[0014] Preferably, the dust cover is made of transparent optical infrared light material, and the inner wall of the dust cover is elliptical and smooth.

[0015] Preferably, the upper cover is provided with a cleaning hole communicating with the dust cover below the elliptical guide ceramic.

[0016] Preferably, the self-gain adjusting circuit comprises

[0017] The transmitting module converts the pulse signal into a light signal for transmission.

[0018] The receiving module receives the transmitted light signal and converts it into an electrical signal.

[0019] The signal amplification module is coupled to the receiving module to amplify and filter the electrical signal.

[0020] The ADC module acquires the current signal value.

[0021] The comparator module compares the amplified and filtered electrical signal with a set threshold value to output a comparison value.

[0022] The MCU processing module receives the current signal value and processes the current sensitivity to output an indication, and judges the comparison value to output an amplified adjustment signal when the comparison value is lower than the set threshold value.

[0023] The gain adjusting module is coupled to the MCU processing module and the signal amplification module, and responds to the adjustment signal to control the signal amplification module to amplify and adjust the received electrical signal.

[0024] Preferably, the sensor is an RS485 bus output.

[0025] In summary, the present application has the following advantages:

[0026] The elliptical guide ceramic on the upper cover and the circular ceramic mounted on the ceramic fixing frame are connected through the ceramic hole, which can be used for yarn threading, limiting the yarn disturbance range when the large roll is twisted, avoiding false detection, and improving the detection accuracy.

[0027] The dust cover can prevent dust, reduce signal interference during detection, reduce the cleaning of the internal sensor, and be more clean and convenient to use, while avoiding interference and improving detection accuracy.

[0028] The self-gain adjustment circuit enables real-time monitoring of the detection signal and adjusts the sensor sensitivity through self-gain adjustment, thereby ensuring that the detection results are always stable and reliable and effectively improving the detection accuracy. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the exploded structure of this sensor;

[0030] Figure 2 This is a front view of the sensor;

[0031] Figure 3 This is a schematic diagram of the trajectory detected by this sensor;

[0032] Figure 4 This is a schematic block diagram of the self-gain adjustment circuit.

[0033] Figure 5 This is a schematic diagram of the bus topology.

[0034] In the diagram: 1. Top cover; 11. Cleaning hole; 2. Dust cover; 3. Circuit board; 4. Bottom shell; 5. Ceramic mounting bracket; 6. Oval guide ceramic; 7. Circular ceramic; 8. Transmitter tube; 9. Receiver tube. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings.

[0036] According to one or more embodiments, a smart photoelectric sensor applicable to yarn overrun detection is disclosed, such as... Figure 1 As shown, it includes a top cover 1, a dust cover 2, a circuit board 3, a bottom shell 4, a ceramic bracket 5, and also includes an elliptical guide ceramic 6 and a circular ceramic 7.

[0037] The top cover 1 has a through hole. An elliptical guide ceramic 6 is installed on the top cover 1, and a circular ceramic 7 is installed on the ceramic fixing bracket 5. The two correspond to each other and both have ceramic holes that are connected in the front and back direction.

[0038] It also includes a transmitting tube 8 and a receiving tube 9 for detection. The transmitting tube 8 is located below the ceramic hole and emits infrared light signals upwards. Two receiving tubes 9 are provided, located on the left and right sides above the ceramic hole, opposite the transmitting tube 8 to receive the light signals. When the yarn passes through the ceramic hole, the detection identifies the yarn's twisting range by detecting the infrared light signals received by the receiving tubes 9 on both sides. An elliptical guide ceramic 6 is horizontally mounted on the upper cover 1 along its long axis. Through the elliptical guide ceramic 6, when the yarn begins to twist on the left side, such as... Figure 3As shown, the yarn forms an elliptical trajectory in the detection area through the circular ceramic 7 and the elliptical shape above it. The guide ceramic embedded in the upper cover 1 is a flat elliptical ceramic 7, which limits the yarn disturbance range when large rolls are twisted, ensuring that the yarn on the left can only be detected in the left detection area and the yarn on the right can only be detected in the right detection area. This avoids the yarn being detected in both detection areas when large rolls are formed. Because the ellipse restricts the yarn's range of motion, the detection accuracy is improved.

[0039] The bottom shell 4 has an opening, and the dust cover 2 is fixedly installed on the bottom shell 4. The lower side wall of the dust cover 2 has a mounting hole for installing the transmitting tube 8. Installing the dust cover 2 above the transmitting tube 8 can protect the transmitting tube 8 from dust and prevent dust from interfering with the emitted light signal. The upper side wall of the dust cover 2 is flat, and there are two light-transmitting surfaces on both sides of the center line, which are used for the receiving ends of the two receiving tubes 9 to connect and receive the infrared light signal emitted by the transmitting tube 8. The dust cover 2 is made of transparent optical infrared light-transmitting material, and the inner side wall of the dust cover 2 is elliptical and flat, which facilitates internal cleaning. The front surface of the dust cover 2 has an opening, and the surface of the top cover 1 has a cleaning hole 11 that connects to the dust cover 2. Through the cleaning hole 11, the internal detection area of ​​the sensor can be cleaned directly without disassembling the sensor, which can effectively improve the detection sensitivity and reduce detection abnormalities or accuracy reduction caused by interference. In addition, users do not need to clean the sensor frequently to ensure its sensitivity and maintain detection reliability. This reduces the number of times users need to clean the sensor, thereby reducing labor costs and improving economic efficiency.

[0040] It also features an auto-gain adjustment circuit to detect the signal and simultaneously adjust the sensitivity accordingly.

[0041] like Figure 4As shown, the self-gain adjustment circuit includes a transmitting module, a receiving module, a signal amplification module, an ADC module, a comparator module, an MCU processing module, and a gain adjustment module. The transmitting module, corresponding to transmitting tube 8, converts the pulse signal into a light signal for transmission. The receiving module, corresponding to receiving tube 9, receives the transmitted infrared light signal and converts it into an electrical signal. The signal amplification module, coupled to the receiving module, amplifies and filters the received and converted electrical signal. The ADC module converts the amplified and filtered electrical signal, acquires the current signal value, and compares the amplified and filtered electrical signal with a set threshold, outputting the comparison value. The MCU processing module, coupled to the ADC module and the comparator module, receives the current signal value, processes it to obtain the current sensitivity, and displays it. It judges the received comparison value and outputs an amplification adjustment signal when it falls below the set threshold. The gain adjustment module, coupled to the MCU processing module and the signal amplification module, responds to the adjustment signal to control the signal amplification module to amplify and adjust the received electrical signal, thereby achieving sensitivity adjustment. The addition of signal detection and gain self-adjustment circuits enables automatic sensitivity adjustment. As the sensor's sensitivity decreases over time, it automatically amplifies the signal to maintain its original sensitivity, remaining within a highly sensitive detection range at all times. This ensures reliable product detection without a decline in sensitivity over time. The sensor uses an RS485 bus output, and the MCU processes the identified signal using software algorithms, transmitting the various states of the yarn to the host computer via RS485 for further processing.

[0042] Replace high and low level outputs with RS485 bus output, such as Figure 5 As shown, multiple sensors in each section are connected to the system via a bus topology, reducing system wiring and optimizing the system layout by replacing 16 wires with two buses. Simultaneously, sensors can be addressed online by sending addressing commands to the host computer or control board, addressing each spindle individually. This unique addressing method improves installation efficiency, reduces user installation time, and saves installation costs. The sensors can output various information, including end-of-line signals, yarn status signals (broken yarn, stationary, yarn on the left, yarn on the right, and yarn blockage, etc.), sensitivity signals, and other key information outputs. This facilitates the design and demonstration of intelligent systems, promotes human-computer interaction, and facilitates system data statistics and analysis.

[0043] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An intelligent photoelectric sensor applicable to yarn overrun detection, comprising a top cover (1), a transmitting tube (8), a receiving tube (9), a circuit board (3), and a bottom shell (4), characterized in that: It also includes Ceramic mounting bracket (5) installed on the bottom shell (4); An elliptical guide ceramic (6) is installed on the top cover (1) with its major axis set horizontally; The circular ceramic (7) is set on the ceramic holder (5), and the circular ceramic (7) and the elliptical guide ceramic (6) have interconnected ceramic holes; Dust cover (2) installed on the bottom shell (4) for dust protection; It also includes an auto-gain adjustment circuit for signal detection and sensitivity adjustment.

2. The intelligent photoelectric sensor applicable to yarn overrun detection according to claim 1, characterized in that: The dust cover (2) has an installation hole for the transmitter tube (8) at the bottom, and two light-transmitting surfaces corresponding to the two receiver tubes (9) are symmetrically arranged on both sides of the center line at the top.

3. The intelligent photoelectric sensor applicable to yarn overrun detection according to claim 2, characterized in that: The dust cover (2) is made of transparent optical infrared light-transmitting material, and the inner sidewall of the dust cover (2) is elliptical and flat.

4. The intelligent photoelectric sensor applicable to yarn overrun detection according to claim 1, characterized in that: The top cover (1) has a cleaning hole (11) connected to the dust cover (2) below the elliptical guide ceramic (6).

5. The intelligent photoelectric sensor applicable to yarn overrun detection according to claim 1, characterized in that: The self-gain adjustment circuit includes The transmitting module converts pulse signals into optical signals for transmission. The receiving module receives the transmitted optical signal and converts it into an electrical signal; The signal amplification module, coupled to the receiving module, amplifies and filters the electrical signal. The ADC module acquires the current signal value. The comparator module compares the amplified and filtered electrical signal with a set threshold to output a comparison value; The MCU processing module receives the current signal value, processes it to obtain the current sensitivity for indication and display, and judges the comparison value to output an amplified adjustment signal when it is lower than the set threshold. The gain adjustment module is coupled to the MCU processing module and the signal amplification module. In response to the adjustment signal, it controls the signal amplification module to amplify and adjust the received electrical signal.

6. The intelligent photoelectric sensor applicable to yarn overrun detection according to claim 1, characterized in that: The sensor has an RS485 bus output.

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