A wire and cable winding device

Abstract

This utility model discloses a wire and cable winding device, belonging to the field of cable reel technology. It solves the problem that when the weak signal from the tension / speed analog sensor of an electric cable reel is transmitted through a long-distance cable and a rotating slip ring, it easily picks up strong electromagnetic interference from motor brush sparks, frequency converters, and power grid surges. Furthermore, the shielding layer on the rotating device is difficult to ground perfectly, resulting in ground loop impedance and causing interference noise to intrude into the signal line. The device includes a fixed frame, a drive motor fixedly connected to the fixed frame, and a rotating drum coaxially connected to the rotor shaft of the drive motor. It also includes an anti-interference analog signal transmission circuit, which includes a receiving end circuit mounted on the fixed frame. This utility model converts the weak analog voltage signal output by the strain gauge on the rotating side into a frequency signal, transmits it through optical isolation and a slip ring, and then demodulates and restores it to a highly anti-interference analog voltage signal on the fixed side.

Description

Technical Field

[0001] This utility model relates to the field of cable reel technology, and in particular to a wire and cable winding device. Background Technology

[0002] Electric cable reels are devices used for automatically winding and unwinding cables. The core components include a drum with a drive motor, a tension / speed detection sensor, and a rotating slip ring. The controller adjusts the motor torque to achieve smooth cable winding and unwinding. They are suitable for engineering operations, equipment power supply, and other scenarios, reducing manual operation. During use, electromagnetic interference must be addressed to ensure accurate control and avoid misjudgments and cable damage caused by signal problems, thereby improving ease of use and cable lifespan.

[0003] During the use of electric cable reels, the output signal of the analog sensor used to detect tension or speed is extremely weak and must be transmitted through a long cable and a rotating slip ring channel. This long transmission path is like an antenna and is very susceptible to strong electromagnetic interference generated by motor brush sparks, frequency converters and power grid surges. At the same time, the shielding layer is difficult to ground perfectly on the rotating device, resulting in ground loop impedance. As a result, interference noise seriously invades the signal line through electromagnetic induction and capacitive coupling.

[0004] This contaminates the pure sensor signal, and the controller receives an erroneous signal superimposed with noise. Ultimately, this causes the system control reference to drift, resulting in problems such as misjudging cable retraction as cable release or severe mismatch between output torque and load. This causes the automatic tracking function to fail completely, and may even cause continuous system oscillation due to positive feedback caused by noise frequency falling within the system response bandwidth. This manifests as motor humming, drum shaking, and repeated tensioning and loosening of the cable, which rapidly accelerates fatigue damage to the machinery and cable.

[0005] Therefore, a wire and cable winding device is proposed to solve or alleviate the above problems. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a wire and cable winding device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A wire and cable winding device includes a fixed frame, a drive motor fixedly connected to the fixed frame, and a rotating drum coaxially driven with the rotor shaft of the drive motor. It also includes an anti-interference analog signal transmission circuit, which includes a receiving circuit mounted on the fixed frame and a transmitting circuit mounted on the rotating drum. The transmitting circuit and the receiving circuit are electrically connected via a slip ring. The transmitting circuit converts detected weak analog signals into anti-interference frequency signals and transmits them through the slip ring. The receiving circuit receives the frequency signals from the slip ring, demodulates them, and restores them to a high-fidelity analog voltage signal for output.

[0008] Preferably, the transmitting circuit includes a sensor excitation and preamplifier module, a voltage-controlled oscillator module, and a digital drive and optocoupler isolation module connected in sequence. The receiving circuit includes a phase-locked loop demodulation module, a second-order low-pass filter module, and an output buffer and calibration module connected in sequence. The signal output terminal of the digital drive and optocoupler isolation module is connected to the signal input terminal of the phase-locked loop demodulation module through a collector ring.

[0009] Preferably, the sensor excitation and preamplification module includes a strain gauge, a precision reference voltage source REF02, and an instrumentation amplifier INA128. The strain gauge is mounted on a rotating drum. The voltage output pin of the precision reference voltage source REF02 is connected to the positive input terminal of the excitation voltage of the strain gauge and the positive power supply pin of the instrumentation amplifier INA128. The ground pin of the precision reference voltage source REF02 is connected to a common ground. The non-inverting input terminal of the instrumentation amplifier INA128 is connected to the positive signal output terminal of the strain gauge, and the inverting input terminal of the instrumentation amplifier INA128 is connected to the negative signal output terminal of the strain gauge. The signal output pin of the instrumentation amplifier INA128 outputs the amplified sensing voltage signal and connects to the signal input terminal of the voltage-controlled oscillator module. A gain setting resistor is connected between the two gain setting pins of the instrumentation amplifier INA128.

[0010] Preferably, the voltage-controlled oscillator module includes a voltage-to-frequency converter LM331, a first operational amplifier OPA2188, and a feedback resistor. The non-inverting input of the first operational amplifier OPA2188 is connected to a sensing voltage signal from a preamplifier module. The signal output pin of the first operational amplifier OPA2188 is connected to the feedback resistor to its inverting input. The signal output pin of the first operational amplifier OPA2188 is connected to the current input pin of the voltage-to-frequency converter LM331. The frequency output pin of the voltage-to-frequency converter LM331 outputs a square wave signal and is connected to the signal input of a digital drive and optocoupler isolation module. A timing setting resistor is connected between the two timing resistor pins of the voltage-to-frequency converter LM331, and a timing setting capacitor is connected between the timing capacitor pin of the voltage-to-frequency converter LM331 and one of the timing resistor pins.

[0011] Preferably, the digital drive and optocoupler isolation module includes a Schmitt trigger 74HC14 and a high-speed optocoupler HCPL-0601. The signal input terminal of the Schmitt trigger 74HC14 is connected to a square wave signal from the voltage-controlled oscillator module. The signal output pin of the Schmitt trigger 74HC14 is connected to the anode pin of the LED of the high-speed optocoupler HCPL-0601 through a current-limiting resistor. The cathode pin of the LED of the high-speed optocoupler HCPL-0601 is connected to a common ground. The collector output pin of the high-speed optocoupler HCPL-0601 is connected to the slip ring of the collector ring as the signal output terminal of the digital drive and optocoupler isolation module. The emitter pin of the high-speed optocoupler HCPL-0601 is connected to the isolation ground. The output stage power supply pin of the high-speed optocoupler HCPL-0601 receives the isolation power supply provided by the collector ring.

[0012] Preferably, the phase-locked loop demodulation module includes a phase-locked loop chip CD4046 and a second operational amplifier TL072. The signal input pin of the phase-locked loop chip CD4046 is connected to a frequency signal from the collector ring. The phase detector output pin of the phase-locked loop chip CD4046 is connected to the inverting input of the second operational amplifier TL072 through a loop resistor. A loop capacitor is connected between the inverting input of the second operational amplifier TL072 and its signal output pin. The signal output pin of the second operational amplifier TL072 outputs a demodulated voltage signal and is connected to the signal input of a second-order low-pass filter module. The signal output pin of the second operational amplifier TL072 is connected to the voltage-controlled oscillator input pin of the phase-locked loop chip CD4046. The voltage-controlled oscillator output pin of the phase-locked loop chip CD4046 is connected to its comparator input pin.

[0013] Preferably, the second-order low-pass filter module includes a dual operational amplifier OPA2134. The non-inverting input of the first operational amplifier in the OPA2134 is connected to a voltage signal from the phase-locked loop demodulation module via a first input resistor. The non-inverting input of the first operational amplifier in the OPA2134 is connected to its signal output pin via a first capacitor. The inverting input of the first operational amplifier in the OPA2134 is connected to a common ground via a second resistor. The inverting input of the first operational amplifier in the OPA2134 is connected to its signal output pin via a third resistor. The signal output pin of the amplifier is connected to the non-inverting input of the second operational amplifier in the OPA2134 dual operational amplifier through a coupling resistor. The non-inverting input of the second operational amplifier in the OPA2134 is connected to its signal output pin through a second capacitor. The inverting input of the second operational amplifier in the OPA2134 is connected to the common ground through a fifth resistor. The inverting input of the second operational amplifier in the OPA2134 is connected to its signal output pin through a sixth resistor. The signal output pin of the second operational amplifier in the OPA2134 outputs a filtered voltage signal and is connected to the signal input of the output buffer and calibration module.

[0014] Preferably, the output buffer and calibration module includes a precision operational amplifier OP07, a first potentiometer, and a second potentiometer. The non-inverting input of the precision operational amplifier OP07 is connected to a voltage signal from a second-order low-pass filter module via a second input resistor. The inverting input of the precision operational amplifier OP07 is connected to the sliding terminal of the first potentiometer. The two fixed terminals of the first potentiometer are respectively connected to the signal output pin of the precision operational amplifier OP07 and a common ground. The non-inverting input of the precision operational amplifier OP07 is connected to the sliding terminal of the second potentiometer. The two fixed terminals of the second potentiometer are respectively connected to positive and negative voltages. The signal output pin of the precision operational amplifier OP07 outputs the final anti-interference analog signal.

[0015] This utility model has the following beneficial effects: This invention converts the weak analog voltage signal output by the strain gauge on the rotating side into a frequency signal, which is then transmitted via optocoupler isolation and slip ring, and demodulated and restored to a highly interference-resistant analog voltage signal on the fixed side. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural block diagram of the anti-interference analog signal transmission circuit in this utility model.

[0018] 1. Fixed frame; 2. Drive motor; 3. Rotating drum; 4. Sensor excitation and preamplifier module; 5. Voltage-controlled oscillator module; 6. Digital drive and optocoupler isolation module; 7. Phase-locked loop demodulation module; 8. Second-order low-pass filter module; 9. Output buffer and calibration module. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "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, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to 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.

[0023] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] 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.

[0025] A wire and cable winding device, such as Figure 1 As shown, the device includes a fixed frame 1, a drive motor 2 fixedly connected to the fixed frame 1, and a rotating drum 3 coaxially connected to the rotor shaft of the drive motor 2. It also includes an anti-interference analog signal transmission circuit, which includes a receiving circuit on the fixed frame 1 and a transmitting circuit on the rotating drum 3. The transmitting circuit and the receiving circuit are electrically connected through a slip ring. The transmitting circuit converts the detected weak analog signal into an anti-interference frequency signal and transmits it through the slip ring. The receiving circuit receives the frequency signal from the slip ring, demodulates it, and restores it to a high-fidelity analog voltage signal for output.

[0026] like Figure 2 As shown, the transmitting circuit includes a sensor excitation and preamplifier module 4, a voltage-controlled oscillator module 5, and a digital drive and optocoupler isolation module 6 connected in sequence. The receiving circuit includes a phase-locked loop demodulation module 7, a second-order low-pass filter module 8, and an output buffer and calibration module 9 connected in sequence. The signal output terminal of the digital drive and optocoupler isolation module 6 is connected to the signal input terminal of the phase-locked loop demodulation module 7 through a collector ring.

[0027] The sensor excitation and preamplification module 4 includes a strain gauge, a precision reference voltage source REF02, and an instrumentation amplifier INA128. The strain gauge is mounted on the rotating drum 3. The voltage output pin of the precision reference voltage source REF02 is connected to the positive input terminal of the excitation voltage of the strain gauge and the positive power supply pin of the instrumentation amplifier INA128. The ground pin of the precision reference voltage source REF02 is connected to the common ground. The non-inverting input terminal of the instrumentation amplifier INA128 is connected to the positive signal output terminal of the strain gauge. The inverting input terminal of the instrumentation amplifier INA128 is connected to the negative signal output terminal of the strain gauge. The signal output pin of the instrumentation amplifier INA128 outputs the amplified sensing voltage signal and connects to the signal input terminal of the voltage-controlled oscillator module 5. A gain setting resistor is connected between the two gain setting pins of the instrumentation amplifier INA128.

[0028] The voltage-controlled oscillator module 5 includes a voltage-to-frequency converter LM331, a first operational amplifier OPA2188, and a feedback resistor. The non-inverting input of the first operational amplifier OPA2188 is connected to the sensing voltage signal from the preamplifier module. The signal output pin of the first operational amplifier OPA2188 is connected to the feedback resistor to its inverting input. The signal output pin of the first operational amplifier OPA2188 is connected to the current input pin of the voltage-to-frequency converter LM331. The frequency output pin of the voltage-to-frequency converter LM331 outputs a square wave signal and is connected to the signal input of the digital drive and optocoupler isolation module 6. A timing setting resistor is connected between the two timing resistor pins of the voltage-to-frequency converter LM331. A timing setting capacitor is connected between the timing capacitor pin of the voltage-to-frequency converter LM331 and one of the timing resistor pins.

[0029] The digital drive and optocoupler isolation module 6 includes a Schmitt trigger 74HC14 and a high-speed optocoupler HCPL-0601. The signal input terminal of the Schmitt trigger 74HC14 is connected to the square wave signal from the voltage-controlled oscillator module 5. The signal output pin of the Schmitt trigger 74HC14 is connected to the anode pin of the LED of the high-speed optocoupler HCPL-0601 through a current-limiting resistor. The cathode pin of the LED of the high-speed optocoupler HCPL-0601 is connected to the common ground. The collector output pin of the high-speed optocoupler HCPL-0601 is connected to the slip ring of the collector ring as the signal output terminal of the digital drive and optocoupler isolation module 6. The emitter pin of the high-speed optocoupler HCPL-0601 is connected to the isolation ground. The output stage power supply pin of the high-speed optocoupler HCPL-0601 receives the isolation power provided by the collector ring.

[0030] The phase-locked loop demodulation module 7 includes a phase-locked loop CD4046 and a second operational amplifier TL072. The signal input pin of the phase-locked loop CD4046 is connected to the frequency signal from the collector ring. The phase detector output pin of the phase-locked loop CD4046 is connected to the inverting input of the second operational amplifier TL072 through a loop resistor. A loop capacitor is connected between the inverting input of the second operational amplifier TL072 and its signal output pin. The signal output pin of the second operational amplifier TL072 outputs a demodulated voltage signal and is connected to the signal input of the second-order low-pass filter module 8. The signal output pin of the second operational amplifier TL072 is connected to the voltage-controlled oscillator input pin of the phase-locked loop CD4046. The voltage-controlled oscillator output pin of the phase-locked loop CD4046 is connected to its comparator input pin.

[0031] The second-order low-pass filter module 8 includes a dual operational amplifier OPA2134. The non-inverting input of the first operational amplifier in OPA2134 is connected to the voltage signal from the phase-locked loop demodulation module 7 via a first input resistor. The non-inverting input of the first operational amplifier in OPA2134 is connected to its signal output pin via a first capacitor. The inverting input of the first operational amplifier in OPA2134 is connected to common ground via a second resistor. The inverting input of the first operational amplifier in OPA2134 is connected to its signal output pin via a third resistor. The signal output pin is connected to the non-inverting input of the second operational amplifier in the OPA2134 dual operational amplifier through a coupling resistor. The non-inverting input of the second operational amplifier in the OPA2134 dual operational amplifier is connected to its signal output pin through a second capacitor. The inverting input of the second operational amplifier in the OPA2134 dual operational amplifier is connected to the common ground through a fifth resistor. The inverting input of the second operational amplifier in the OPA2134 dual operational amplifier is connected to its signal output pin through a sixth resistor. The signal output pin of the second operational amplifier in the OPA2134 dual operational amplifier outputs a filtered voltage signal and is connected to the signal input of the output buffer and calibration module 9.

[0032] The output buffer and calibration module 9 includes a precision operational amplifier OP07, a first potentiometer, and a second potentiometer. The non-inverting input of the precision operational amplifier OP07 is connected to the voltage signal from the second-order low-pass filter module 8 through a second input resistor. The inverting input of the precision operational amplifier OP07 is connected to the sliding terminal of the first potentiometer. The two fixed terminals of the first potentiometer are respectively connected to the signal output pin of the precision operational amplifier OP07 and the common ground. The non-inverting input of the precision operational amplifier OP07 is connected to the sliding terminal of the second potentiometer. The two fixed terminals of the second potentiometer are respectively connected to positive and negative voltages. The signal output pin of the precision operational amplifier OP07 outputs the final anti-interference analog signal.

[0033] When the electric cable reel is working, the anti-interference analog signal transmission circuit senses the physical quantity of cable tension by the strain gauge. The weak differential analog signal output by the circuit is first sent to the sensor excitation and preamplifier module 4. The precision reference voltage source in this module provides a stable excitation voltage for the strain gauge to ensure the accuracy of signal acquisition. At the same time, the instrumentation amplifier amplifies the weak signal with a high common-mode rejection ratio, effectively suppressing common-mode interference on the transmission line. Its gain is precisely set by an external resistor, thereby outputting a sensing voltage signal with significantly improved amplitude and signal-to-noise ratio.

[0034] The voltage signal is then transmitted to the voltage-controlled oscillator module 5, whose core voltage-frequency converter, driven by a linear voltage-current conversion circuit, accurately converts the analog voltage sensing voltage signal into a square wave signal with a frequency linearly related to it. The frequency range is designed to be between 10kHz and 50kHz, corresponding to the minimum and maximum tension values, respectively. This conversion process carries the sensitive analog voltage information on a square wave with varying frequency, greatly enhancing the signal's anti-interference potential.

[0035] The square wave signal then enters the digital drive and optocoupler isolation module 6. First, it undergoes waveform shaping and buffering via a Schmitt trigger. Then, the square wave signal is electrically isolated and transmitted via a high-speed optocoupler using light as the medium. The LED side of the optocoupler is driven by the rotating side power supply, and its collector output directly drives the slip ring of the collector ring. At the same time, the isolation power supply and isolation ground provided by the fixed side supply power to the optocoupler output stage through two other independent slip rings. This disconnects the electrical connection between the rotating side and the fixed side, effectively eliminating the influence of ground loop impedance and common-mode noise.

[0036] The frequency signal transmitted to the fixed side via the collector ring enters the phase-locked loop demodulation module 7. The phase-locked loop compares the phase difference between the input signal and the output signal of the voltage-controlled oscillator (VCO) through its internal phase detector and outputs an error voltage. This voltage is smoothed by an active low-pass filter composed of an external operational amplifier to form the demodulated voltage. This voltage also feeds back to control the frequency of the VCO inside the phase-locked loop, forming a closed-loop tracking system that forces the VCO frequency to always lock to the input signal frequency, thereby recovering the original low-frequency analog voltage signal from the FM wave with high quality. The demodulated voltage may still contain residual high-frequency switching noise, so it is sent to the second-order low-pass filter module 8. This module uses a two-stage second-order Sallen-Key topology to finely filter the signal. Its steep roll-off characteristic can effectively filter out the carrier frequency and its harmonic components, as well as various high-frequency interferences, and output a smooth and clean DC voltage signal.

[0037] Finally, the signal enters the output buffer and calibration module 9. The precision operational amplifier forms a non-inverting amplifier circuit to provide a low-impedance output. At the same time, two multi-turn precision potentiometers are used to adjust the bias of the inverting and non-inverting input terminals of the operational amplifier, respectively, to achieve fine calibration of the circuit's zero-point and full-scale gain. A stable, accurate, and highly anti-interference 1-5V standard analog voltage signal is output and sent to the external host control system, that is, the external controller, to complete the entire signal transmission and processing process.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wire and cable winding device, characterized in that, The device includes a fixed frame (1), a drive motor (2) fixedly connected to the fixed frame (1), and a rotating drum (3) coaxially connected to the rotor shaft of the drive motor (2). It also includes an anti-interference analog signal transmission circuit. The anti-interference analog signal transmission circuit includes a receiving circuit set on the fixed frame (1) and a transmitting circuit set on the rotating drum (3). The transmitting circuit and the receiving circuit are electrically connected through a slip ring. The transmitting circuit converts the detected weak analog signal into an anti-interference frequency signal and transmits it through the slip ring. The receiving circuit receives the frequency signal from the slip ring, demodulates it, and restores it to a high-fidelity analog voltage signal for output.

2. The wire and cable winding device according to claim 1, characterized in that, The transmitting circuit includes a sensor excitation and preamplifier module (4), a voltage-controlled oscillator module (5), and a digital drive and optocoupler isolation module (6) connected in sequence. The receiving circuit includes a phase-locked loop demodulation module (7), a second-order low-pass filter module (8), and an output buffer and calibration module (9) connected in sequence. The signal output terminal of the digital drive and optocoupler isolation module (6) is connected to the signal input terminal of the phase-locked loop demodulation module (7) through a collector ring.

3. The wire and cable winding device according to claim 2, characterized in that, The sensor excitation and preamplification module (4) includes a strain gauge, a precision reference voltage source REF02, and an instrumentation amplifier INA128. The strain gauge is mounted on a rotating drum (3). The voltage output pin of the precision reference voltage source REF02 is connected to the positive input terminal of the excitation voltage of the strain gauge and the positive power supply pin of the instrumentation amplifier INA128. The ground pin of the precision reference voltage source REF02 is connected to the common ground. The non-inverting input terminal of the instrumentation amplifier INA128 is connected to the positive signal output terminal of the strain gauge. The inverting input terminal of the instrumentation amplifier INA128 is connected to the negative signal output terminal of the strain gauge. The signal output pin of the instrumentation amplifier INA128 outputs the amplified sensing voltage signal and connects to the signal input terminal of the voltage-controlled oscillator module (5). A gain setting resistor is connected between the two gain setting pins of the instrumentation amplifier INA128.

4. A wire and cable winding device according to claim 2, characterized in that, The voltage-controlled oscillator module (5) includes a voltage-frequency converter LM331, a first operational amplifier OPA2188, and a feedback resistor. The non-inverting input of the first operational amplifier OPA2188 is connected to the sensing voltage signal from the preamplifier module. The signal output pin of the first operational amplifier OPA2188 is connected to the feedback resistor to its inverting input. The signal output pin of the first operational amplifier OPA2188 is connected to the current input pin of the voltage-frequency converter LM331. The frequency output pin of the voltage-frequency converter LM331 outputs a square wave signal and is connected to the signal input of the digital drive and optocoupler isolation module (6). A timing setting resistor is connected between the two timing resistor pins of the voltage-frequency converter LM331. A timing setting capacitor is connected between the timing capacitor pin of the voltage-frequency converter LM331 and one of the timing resistor pins.

5. A wire and cable winding device according to claim 2, characterized in that, The digital drive and optocoupler isolation module (6) includes a Schmitt trigger 74HC14 and a high-speed optocoupler HCPL-0601. The signal input terminal of the Schmitt trigger 74HC14 is connected to the square wave signal from the voltage-controlled oscillator module (5). The signal output pin of the Schmitt trigger 74HC14 is connected to the anode pin of the LED of the high-speed optocoupler HCPL-0601 through a current-limiting resistor. The cathode pin of the LED of the high-speed optocoupler HCPL-0601 is connected to the common ground. The collector output pin of the high-speed optocoupler HCPL-0601 is connected to the slip ring of the collector ring as the signal output terminal of the digital drive and optocoupler isolation module (6). The emitter pin of the high-speed optocoupler HCPL-0601 is connected to the isolation ground. The output stage power supply pin of the high-speed optocoupler HCPL-0601 receives the isolation power provided by the collector ring.

6. A wire and cable winding device according to claim 2, characterized in that, The phase-locked loop demodulation module (7) includes a phase-locked loop chip CD4046 and a second operational amplifier TL072. The signal input pin of the phase-locked loop chip CD4046 is connected to a frequency signal from the collector ring. The phase detector output pin of the phase-locked loop chip CD4046 is connected to the inverting input of the second operational amplifier TL072 through a loop resistor. A loop capacitor is connected between the inverting input of the second operational amplifier TL072 and its signal output pin. The signal output pin of the second operational amplifier TL072 outputs a demodulated voltage signal and is connected to the signal input of the second-order low-pass filter module (8). The signal output pin of the second operational amplifier TL072 is connected to the voltage-controlled oscillator input pin of the phase-locked loop chip CD4046. The voltage-controlled oscillator output pin of the phase-locked loop chip CD4046 is connected to its comparator input pin.

7. A wire and cable winding device according to claim 2, characterized in that, The second-order low-pass filter module (8) includes a dual operational amplifier OPA2134. The non-inverting input of the first operational amplifier in the dual operational amplifier OPA2134 is connected to the voltage signal from the phase-locked loop demodulation module (7) via a first input resistor. The non-inverting input of the first operational amplifier in the dual operational amplifier OPA2134 is connected to its signal output pin via a first capacitor. The inverting input of the first operational amplifier in the dual operational amplifier OPA2134 is connected to common ground via a second resistor. The inverting input of the first operational amplifier in the dual operational amplifier OPA2134 is connected to its signal output pin via a third resistor. The first operational amplifier in the dual operational amplifier OPA2134... The signal output pin of the amplifier is connected to the non-inverting input of the second operational amplifier in the dual operational amplifier OPA2134 through a coupling resistor. The non-inverting input of the second operational amplifier in the dual operational amplifier OPA2134 is connected to its signal output pin through a second capacitor. The inverting input of the second operational amplifier in the dual operational amplifier OPA2134 is connected to the common ground through a fifth resistor. The inverting input of the second operational amplifier in the dual operational amplifier OPA2134 is connected to its signal output pin through a sixth resistor. The signal output pin of the second operational amplifier in the dual operational amplifier OPA2134 outputs a filtered voltage signal and is connected to the signal input of the output buffer and calibration module (9).

8. A wire and cable winding device according to claim 2, characterized in that, The output buffer and calibration module (9) includes a precision operational amplifier OP07, a first potentiometer, and a second potentiometer. The non-inverting input of the precision operational amplifier OP07 is connected to a voltage signal from a second-order low-pass filter module (8) through a second input resistor. The inverting input of the precision operational amplifier OP07 is connected to the sliding terminal of the first potentiometer. The two fixed terminals of the first potentiometer are respectively connected to the signal output pin of the precision operational amplifier OP07 and the common ground. The non-inverting input of the precision operational amplifier OP07 is connected to the sliding terminal of the second potentiometer. The two fixed terminals of the second potentiometer are respectively connected to positive and negative voltages. The signal output pin of the precision operational amplifier OP07 outputs the final anti-interference analog signal.

Images