Torsional vibration sensor for intelligent operation and maintenance

Abstract

The invention discloses a torsional vibration sensor for intelligent operation and maintenance, which is characterized by comprising a first position sensor, a second position sensor and a torque vibration data processing module, the first position sensor and the second position sensor are respectively arranged at two positions of a rotating shaft of the motor to be measured, and the first position sensor and the second position sensor are used for measuring the shaft positions of the two positions of the rotating shaft; the first position sensor and the second position sensor are both electrically connected with the torque vibration data processing module, and the torque vibration data processing module processes information acquired by the first position sensor and the second position sensor to obtain target data. According to the torsional vibration sensor, the torsional degree and the vibration quantity of the rotating shaft are obtained by taking the position difference value, and data processing is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of torsional vibration sensors, and in particular to a torsional vibration sensor for intelligent operation and maintenance. Background Art

[0002] Torsional vibration of the transmission system is a type of mechanical vibration. Electromechanical torsional vibration not only causes damage to the components of steel rolling machinery and endangers production, but also troubles other industries. In the servo transmission in the field of intelligent manufacturing, electromechanical resonance affects the control performance and control accuracy of the robot. In terms of ship propulsion, electromechanical torsional vibration causes the breakage of connecting shafts, propeller shafts, etc., and brings huge noise and other hazards, seriously affecting the safe operation of the ship. In high-speed train traction, electromechanical torsional vibration will cause wear of motor bearings, reduce life, and cause accidents such as broken gears in the gearbox, reducing the safety and reliability of train operation and affecting passenger comfort. Therefore, it is necessary to measure and control torsional vibration. The measurement mainly uses a torsional vibration sensor.

[0003] Currently, conventional torsional vibration sensors on the market are divided into three categories. The first is to directly measure torque and obtain torque vibration inertia through Fourier transform; the second is the indirect measurement method, that is, using a speed sensor to obtain real-time speed through a high-speed sampling rate, subtracting the set speed to obtain the speed difference, and then calculate the torsional vibration inertia; the third is the dual-speed sensor measurement method, by placing two identical speed sensors at both ends of a drive shaft, and calculating the torsional vibration inertia through the speed difference.

[0004] The first method, which directly measures torque, is costly and complex to install. The second method, although simple to use, is not very accurate and is difficult to implement as a later modification and upgrade because the high-speed data acquisition signals of the equipment are generally not shared with external data. The third method, although simple to install, has a high cost for conventional speed sensors and requires an additional high-cost data processing module to realize the detection function.

[0005] Therefore, there is an urgent need to design a better torque vibration measurement method or torque vibration sensor. Summary of the invention

[0006] In view of the above problems existing in the prior art, it is intended to provide a torsional vibration sensor for intelligent operation and maintenance.

[0007] The specific technical solutions are as follows:

[0008] A torsional vibration sensor for intelligent operation and maintenance, mainly comprising: a first position sensor, a second position sensor and a torque vibration data processing module;

[0009] The first position sensor and the second position sensor are respectively installed at two positions of the rotating shaft of the motor to be measured, and the first position sensor and the second position sensor are used to measure the shaft positions of the two positions of the rotating shaft;

[0010] The first position sensor and the second position sensor are both electrically connected to the torque vibration data processing module, and the torque vibration data processing module processes the information collected by the first position sensor and the second position sensor to obtain target data.

[0011] The above-mentioned torsional vibration sensor for intelligent operation and maintenance also has the following feature: the first position sensor and the second position sensor can be optical position sensors or magnetic position sensors.

[0012] The above-mentioned torsional vibration sensor for intelligent operation and maintenance also has the following characteristics:

[0013] The first position sensor includes a first light source, a first photoelectric sensor and a first grayscale color band;

[0014] The first grayscale ribbon is wrapped around the outer circumference of the rotating shaft, the first light source and the first photoelectric sensor are arranged on the same side of the first grayscale ribbon, the first light source is used to emit light to the first grayscale ribbon, the first photoelectric sensor is used to collect reflected light information of the first grayscale ribbon, and the first photoelectric sensor is electrically connected to the torque vibration data processing module;

[0015] The second position sensor is an optical position sensor, and the second position sensor includes a second light source, a second photoelectric sensor and a second grayscale color band;

[0016] The second grayscale ribbon is wrapped around the outer circumference of the rotating shaft, the second light source and the second photoelectric sensor are arranged on the same side of the second grayscale ribbon, the second light source is used to emit light to the second grayscale ribbon, the second photoelectric sensor is used to collect reflection information of the second grayscale ribbon, and the second photoelectric sensor is electrically connected to the torque vibration data processing module.

[0017] The above-mentioned torsional vibration sensor for intelligent operation and maintenance also has the following feature: the data collected by the first photoelectric sensor and the second photoelectric sensor are calibrated, assuming that the collected grayscale value is calibrated according to the analog value of 0-100-0, where 0 corresponds to the position of the axis at an angle of 0°, 100 corresponds to the position of the axis at an angle of 180°, and 0 corresponds to the position of the axis at an angle of 360°, that is, returning to the angle of 0°, the analog value range of 0-100-0 can be collected.

[0018] The above-mentioned torsional vibration sensor for intelligent operation and maintenance also has the following characteristics:

[0019] The first position sensor is a magnetic position sensor, and the first position sensor includes a first magnet ring and a first Hall sensor, the first magnet ring is wrapped around the outer circumference of the rotating shaft, and the first Hall sensor is aligned with the first magnet ring;

[0020] The second position sensor is a magnetic position sensor, and the second position sensor includes a second magnet ring and a second Hall sensor, the second magnet ring is wrapped around the outer circumference of the rotating shaft, and the second Hall sensor is aligned with the second magnet ring;

[0021] The first Hall sensor and the second Hall sensor are both electrically connected to the torque vibration data processing module.

[0022] The above-mentioned torsional vibration sensor for intelligent operation and maintenance also has the following characteristics:

[0023] The torque vibration data processing module includes a differential amplifier;

[0024] The first photoelectric sensor and the second photoelectric sensor are both electrically connected to the differential amplifier, and the differential amplifier can obtain target data Δa by performing a differential operation on the first photoelectric sensor and the second photoelectric sensor;

[0025] or

[0026] The first Hall sensor and the second Hall sensor are both electrically connected to the differential amplifier, and the differential amplifier can obtain target data Δa by performing a differential operation on the first Hall sensor and the second Hall sensor.

[0027] The above-mentioned torsional vibration sensor for intelligent operation and maintenance also has the following feature: the torque vibration data processing module includes a differential amplifier, the first photoelectric sensor is electrically connected to the differential amplifier, and the differential amplifier can measure the speed of the rotating shaft.

[0028] The above-mentioned torsional vibration sensor for intelligent operation and maintenance also has such a feature that the torque vibration data processing module also includes a reference source and a comparator, the reference source is electrically connected to the comparator, the differential amplifier is electrically connected to the comparator, and the comparator compares the torque vibration amount output by the differential amplifier with the reference source to obtain alarm information.

[0029] The positive effects of the above technical solution are:

[0030] The present invention provides a torsional vibration sensor for intelligent operation and maintenance. The measurement principle is different from the three in the background technology. A low-cost dual-position sensor is used as a measuring element. The degree of distortion and vibration of the rotating shaft itself are obtained by taking the difference in the position, and data processing is more convenient. This method has lower cost and simple installation. In addition to being used for feedback of the torsional vibration algorithm of the frequency converter, it can also be used as an independent unit in conjunction with the intelligent operation and maintenance system in related fields such as motor detection and alarm. Specifically, △a can be measured directly without additional processing, so the measurement accuracy is higher. At the same time, the use of low-cost motor position sensors and torque vibration processing modules can reduce system costs. The system can easily interact with systems such as frequency converters and Internet of Things platforms to achieve the purpose of intelligent operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the overall structure of a torsional vibration sensor for intelligent operation and maintenance provided by the present invention;

[0032] Figure 2 A schematic diagram of the structure of an embodiment of a torsional vibration sensor for intelligent operation and maintenance provided by the present invention;

[0033] Figure 3 This is a schematic diagram of the calibration of the grayscale band;

[0034] Figure 4 This is the waveform diagram of the torque vibration amount when the differential amplifier makes a differential output of two photoelectric sensors;

[0035] Figure 5 A schematic diagram of the structure of another embodiment of a torsional vibration sensor for intelligent operation and maintenance provided by the present invention;

[0036] Figure 6 A schematic diagram of the connection structure between a torsional vibration sensor and a frequency converter for intelligent operation and maintenance provided by the present invention;

[0037] Figure 7 A schematic diagram of the connection structure between a torsional vibration sensor and a VCB cabinet for intelligent operation and maintenance provided by the present invention;

[0038] Figure 8 A structural schematic diagram of a torsional vibration sensor for intelligent operation and maintenance provided by the present invention connected to a local Internet of Things platform.

[0039] In the accompanying drawings: 1. first position sensor; 111. first light source; 121. first photoelectric sensor; 131. first grayscale band; 141. first magnet ring; 151. first Hall sensor; 212. second light source; 2. second position sensor; 222. second photoelectric sensor; 232. second grayscale band; 242. second magnet ring; 252. second Hall sensor; 3. rotating shaft; 4. torque vibration data processing module; 41. differential amplifier; 42. differential amplifier; 43. reference source; 44. comparator; 5. motor to be measured; 6. frequency converter; 7. VCB cabinet; 8. local Internet of Things platform; 9. cloud service. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] The serial numbers of the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] See also Figures 1 to 5 Before describing a torsional vibration sensor for intelligent operation and maintenance of the present invention, the basic measurement principle of the new torsional vibration sensor for intelligent operation and maintenance is first introduced.

[0044] For the rotating shaft 3, the torque can also be calculated by the relative torsion angle. The basic principle of the new torsional vibration sensor for intelligent operation and maintenance is based on the following calculation formula (Formula 1)

[0045]

[0046] Where T is the wheelbase, GJz is the torsional stiffness, Δa is the relative torsion angle (position difference), and L is the axial length between the two measurement sections. GJz and L are known quantities. T is proportional to Δa.

[0047] The third dual-speed sensor measurement method (dual-speed sensor measurement method) mentioned in the background art is similar to the above formula, except that Δa is replaced, as shown in Formula 2:

[0048] Δa=∫Δr(t)

[0049] Formula 2

[0050] Where Δr(t) is the speed difference between the sensors at the two locations.

[0051] The dual-speed sensor measurement method is based on a dual-speed sensor, so the speed difference needs to be integrated to obtain the relative torsion angle. Compared with this processing method, the new torsional vibration sensor for intelligent operation and maintenance provided by the present invention can directly measure Δa with higher measurement accuracy. The torsional vibration sensor for intelligent operation and maintenance provided by the present invention is described in detail below.

[0052] The torsional vibration sensor (torsional vibration sensor) for intelligent operation and maintenance provided by the present invention comprises: a first position sensor 1, a second position sensor 2 and a torque vibration data processing module 4;

[0053] The first position sensor 1 and the second position sensor 2 are respectively installed at two positions of the rotating shaft 3 of the motor 5 to be measured, and the first position sensor 1 and the second position sensor 2 are used to measure the shaft positions of the two positions of the rotating shaft 3;

[0054] The first position sensor 1 and the second position sensor 2 are both electrically connected to the torque vibration data processing module 4 , and the torque vibration data processing module 4 processes the information collected by the first position sensor 1 and the second position sensor 2 to obtain target data.

[0055] The motor 5 to be measured and the motor drive shaft (rotating shaft 3) are the measurement objects and are not components of the torsional vibration sensor;

[0056] The first position sensor 1 and the second position sensor 2 are mainly used to measure the shaft positions of two positions of the rotating shaft 3 of the motor 5 to be measured;

[0057] The installation distance between the first position sensor 1 and the second position sensor 2 corresponds to L (axial length between two measuring sections) in formula 1;

[0058] The information obtained by the first position sensor 1 and the second position sensor 2 is used to obtain target data through the torque vibration data processing module 4 .

[0059] Optionally, in this embodiment, the first position sensor 1 and the second position sensor 2 may be optical position sensors or magnetic position sensors.

[0060] like Figures 2 to 4 As shown, optionally, in a specific embodiment, the first position sensor 1 is an optical position sensor, and the first position sensor 1 includes a first light source 111, a first photoelectric sensor 121 and a first grayscale color band 131;

[0061] The first grayscale ribbon 131 is wrapped around the outer circumference of the rotating shaft 3, the first light source 111 and the first photoelectric sensor 121 are arranged on the same side of the first grayscale ribbon 131, the first light source 111 is used to emit light to the first grayscale ribbon 131, the first photoelectric sensor 121 is used to collect the reflection information of the first grayscale ribbon 131, and the first photoelectric sensor 121 is electrically connected to the torque vibration data processing module 4.

[0062] Among them, the photoelectric sensor is a device that converts light signals into electrical signals. Its working principle is based on the photoelectric effect. The photoelectric effect refers to the phenomenon that when light shines on certain substances, the electrons of the substance absorb the energy of photons and produce corresponding electrical effects. According to the different photoelectric effect phenomena, the photoelectric effect is divided into three categories: external photoelectric effect, internal photoelectric effect and photovoltaic effect. Photoelectric devices include phototubes, photomultiplier tubes, photoresistors, photodiodes, phototransistors, photocells, etc. The performance and characteristic curves of photoelectric devices are analyzed.

[0063] Similarly, the second position sensor 2 is an optical position sensor, and the second position sensor 2 includes a second light source 212, a second photoelectric sensor 222 and a second grayscale color band 232;

[0064] The second grayscale ribbon 232 is wrapped around the outer circumference of the rotating shaft, the second light source 212 and the second photoelectric sensor 222 are arranged on the same side of the second grayscale ribbon 232, the second light source 212 is used to emit light to the second grayscale ribbon 232, the second photoelectric sensor 222 is used to collect the reflection information of the second grayscale ribbon 232, and the second photoelectric sensor 222 is electrically connected to the torque vibration data processing module 4.

[0065] The torque vibration data processing module 4 processes the information collected by the first photoelectric sensor 121 and the second photoelectric sensor 222 to obtain target data.

[0066] The measurement process of the torsional vibration sensor is as follows:

[0067] The outside of the first photoelectric sensor 1 is a closed environment, and no other light sources enter. The first light source 111 emits light to illuminate the first grayscale band 131 on the rotating shaft 3. The first grayscale band 131 absorbs the light signal, the white part reflects more light, and the black part reflects less light. The first photoelectric sensor 1 collects the reflection information on the first grayscale band 131, and calibrates the data (the data collected by the first photoelectric sensor 121 and the second photoelectric sensor 222), assuming that the collected grayscale value is calibrated according to the analog value of 0-100-0. Among them, 0 corresponds to the position of the axis at an angle of 0°, 100 corresponds to the position of the axis at an angle of 180°, and 0 corresponds to the position of the axis at an angle of 360°, that is, returning to an angle of 0°, the analog value range of 0-100-0 can be collected.

[0068] The data of the first position sensor 1 and the second position sensor 2 enter the torsional vibration data processing module 4, which processes and analyzes them. Optionally, the torsional vibration data processing module 4 includes a differential amplifier 41, and the first photoelectric sensor 1 and the second photoelectric sensor 2 are both electrically connected to the differential amplifier 41. The differential amplifier 41 can obtain the target data Δa by performing a difference between the first photoelectric sensor 1 and the second photoelectric sensor 2. Through the sensor structure and circuit design provided by the present invention, Δa can be directly measured without additional processing, so the measurement accuracy is higher, and the use of low-cost position sensors and torque vibration processing modules can reduce system costs.

[0069] At the same time, the differential amplifier 41 of the torsional vibration data processing module 4 can also perform a differential operation on the first photoelectric sensor 1 and the second photoelectric sensor 2 to obtain a gain of The output value is the torque vibration, and the waveform is as follows Figure 4 As shown, the frequency of the signal is the frequency of the torque vibration, and the amplitude is the intensity of the torque vibration.

[0070] Furthermore, since speed is a differential of position, the speed of the rotating shaft 3 can be measured by a differential amplifier. Therefore, the torque vibration data processing module 4 includes a differential amplifier 42, the first photoelectric sensor 1 is electrically connected to the differential amplifier 42, and the differential amplifier 42 can measure the speed of the rotating shaft 3.

[0071] The torque vibration data processing module 4 also includes a reference source 43 and a comparator 44, the reference source 43 is electrically connected to the comparator 44, the differential amplifier 41 is electrically connected to the comparator 44, and the comparator 44 compares the torque vibration output by the differential amplifier 41 with the reference source 43 to obtain alarm information. When the vibration intensity is too high, an alarm signal can be output, and only the alarm module needs to be designed.

[0072] In general, the target data is one or more of information such as shaft torque vibration, alarm, speed, acceleration, position, etc.

[0073] like Figures 3 to 5 As shown, optionally, in another specific embodiment, the first position sensor 1 is a magnetic position sensor, and the first position sensor 1 includes a first magnet ring 141 and a first Hall sensor 151, the first magnet ring 141 is wrapped around the outer periphery of the rotating shaft 3, and the first Hall sensor 151 is aligned with the first magnet ring 141;

[0074] The second position sensor 2 is a magnetic position sensor, and the second position sensor 2 includes a second magnet ring 242 and a second Hall sensor 252. The second magnet ring 242 is wrapped around the outer circumference of the rotating shaft 13, and the second Hall sensor 252 is aligned with the second magnet ring 242.

[0075] The first Hall sensor 151 and the second Hall sensor 252 are both electrically connected to the torque vibration data processing module 4 .

[0076] The torque vibration data processing module 4 includes a differential amplifier 41; the first Hall sensor 151 and the second Hall sensor 252 are both electrically connected to the differential amplifier 41, and the differential amplifier 41 can obtain the target data Δa by performing a difference between the first Hall sensor 151 and the second Hall sensor 252. Through the sensor structure and circuit design provided by the present invention, Δa can be directly measured without additional processing, so the measurement accuracy is higher, and the use of low-cost position sensors and torque vibration processing modules can reduce system costs.

[0077] At the same time, the differential amplifier 41 of the torsional vibration data processing module 4 can also obtain a gain of , and the output value is the torque vibration value, and the waveform is as follows: Figure 4 As shown, the frequency of the signal is the frequency of the torque vibration, and the amplitude is the intensity of the torque vibration.

[0078] Further, since speed is a differential of position, the speed of the rotating shaft 3 can be measured by a differential amplifier. Therefore, the torque vibration data processing module 4 includes a differential amplifier 42, and the first Hall sensor 151 is electrically connected to the differential amplifier 42, and the differential amplifier 42 can measure the speed of the rotating shaft 3.

[0079] The torque vibration data processing module 4 also includes a reference source 43 and a comparator 44, the reference source 43 is electrically connected to the comparator 44, the differential amplifier 41 is electrically connected to the comparator 44, and the comparator 44 compares the torque vibration output by the differential amplifier 41 with the reference source 43 to obtain alarm information. When the vibration intensity is too high, an alarm signal can be output, and only the alarm module needs to be designed.

[0080] In general, the target data is one or more of information such as shaft torque vibration, alarm, speed, acceleration, position, etc.

[0081] The system can conveniently interact with inverters, IoT platforms and other systems to achieve the purpose of intelligent operation and maintenance.

[0082] The present invention provides a torsional vibration sensor for intelligent operation and maintenance. The measurement principle is different from the three in the background technology. A low-cost dual-position sensor is used as a measuring element. The degree of distortion and vibration of the rotating shaft 3 itself are obtained by taking the difference in the position, and data processing is more convenient. This method has lower cost and simple installation. In addition to being used for feedback of the torsional vibration algorithm of the frequency converter, it can also be used as an independent unit in conjunction with the intelligent operation and maintenance system in related fields such as motor detection and alarm. Specifically, △a can be measured directly without additional processing, so the measurement accuracy is higher. At the same time, the use of low-cost motor position sensors and torque vibration processing modules can reduce system costs.

[0083] The torsional vibration sensor can conveniently interact with the inverter, the Internet of Things platform and other systems to achieve the purpose of intelligent operation and maintenance. Of course, the torsional vibration sensor can also be applied to many other scenarios, which are only listed here and are not used to limit the present invention.

[0084] See also Figure 6 The torsional vibration sensor is connected to the inverter. As the feedback system of the inverter 6, the torsional vibration sensor cooperates with the inverter 6 integrated torsional vibration suppression algorithm, such as the virtual damping method, to effectively suppress the vibration of the shaft system, enhance the robustness of the inverter 6 and the reliability of the electrical system, and reduce the probability of the motor breaking the shaft. Compared with the original indirect processing method using the speed quantity, the accuracy is higher and the feedback is more precise.

[0085] See also Figure 7The torsional vibration sensor is directly connected to the VCB cabinet 7 (motor control switch); when the torque vibration sensor exceeds the preset threshold, the power supply is directly cut off to prevent the motor shaft from breaking and causing more serious damage.

[0086] See also Figure 8 The torsional vibration sensor is connected to the local IoT platform 8; the local IoT platform 8 is connected to the cloud service 9; through the torque vibration sensor, the actual data of the motor torque vibration is sent to the IoT platform 8 in real time, and the torsional vibration state of the motor is monitored in real time. At the same time, the possibility of shaft fracture of the motor is discovered and predicted through long-term data records, so as to achieve the purpose of intelligent operation and maintenance.

[0087] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A torsional vibration sensor for intelligent operation and maintenance, characterized in that: include: A first position sensor, a second position sensor and a torque vibration data processing module; The first position sensor and the second position sensor are respectively installed at two positions of the rotating shaft of the motor to be measured, and the first position sensor and the second position sensor are used to measure the shaft positions of the two positions of the rotating shaft; The first position sensor and the second position sensor are both electrically connected to the torque vibration data processing module, and the torque vibration data processing module processes the information collected by the first position sensor and the second position sensor to obtain target data.

2. The torsional vibration sensor for intelligent operation and maintenance according to claim 1, characterized in that: The first position sensor and the second position sensor may be optical position sensors or magnetic position sensors.

3. The torsional vibration sensor for intelligent operation and maintenance according to claim 2, characterized in that: The first position sensor is an optical position sensor, and the first position sensor includes a first light source, a first photoelectric sensor and a first grayscale color band; The first grayscale ribbon is wrapped around the outer circumference of the rotating shaft, the first light source and the first photoelectric sensor are arranged on the same side of the first grayscale ribbon, the first light source is used to emit light to the first grayscale ribbon, the first photoelectric sensor is used to collect reflected light information of the first grayscale ribbon, and the first photoelectric sensor is electrically connected to the torque vibration data processing module; The second position sensor is an optical position sensor, and the second position sensor includes a second light source, a second photoelectric sensor and a second grayscale color band; The second grayscale ribbon is wrapped around the outer circumference of the rotating shaft, the second light source and the second photoelectric sensor are arranged on the same side of the second grayscale ribbon, the second light source is used to emit light to the second grayscale ribbon, the second photoelectric sensor is used to collect reflection information of the second grayscale ribbon, and the second photoelectric sensor is electrically connected to the torque vibration data processing module.

4. The torsional vibration sensor for intelligent operation and maintenance according to claim 3, characterized in that: The data collected by the first photoelectric sensor and the second photoelectric sensor are calibrated. It is assumed that the collected grayscale values ​​are calibrated according to the analog value of 0-100-0, where 0 corresponds to the axis position of 0°, 100 corresponds to the axis position of 180°, and 0 corresponds to the axis position of 360°, that is, returning to the 0° angle, and the analog value range of 0-100-0 can be collected.

5. The torsional vibration sensor for intelligent operation and maintenance according to claim 2, characterized in that: The first position sensor is a magnetic position sensor, and the first position sensor includes a first magnet ring and a first Hall sensor, the first magnet ring is wrapped around the outer circumference of the rotating shaft, and the first Hall sensor is aligned with the first magnet ring; The second position sensor is a magnetic position sensor, and the second position sensor includes a second magnet ring and a second Hall sensor, the second magnet ring is wrapped around the outer circumference of the rotating shaft, and the second Hall sensor is aligned with the second magnet ring; The first Hall sensor and the second Hall sensor are both electrically connected to the torque vibration data processing module.

6. The torsional vibration sensor for intelligent operation and maintenance according to any one of claims 3 to 5, characterized in that: The torque vibration data processing module includes a differential amplifier; The first photoelectric sensor and the second photoelectric sensor are both electrically connected to the differential amplifier, and the differential amplifier can obtain target data Δa by performing a differential operation on the first photoelectric sensor and the second photoelectric sensor; or The first Hall sensor and the second Hall sensor are both electrically connected to the differential amplifier, and the differential amplifier can obtain target data Δa by performing a differential operation on the first Hall sensor and the second Hall sensor.

7. The torsional vibration sensor for intelligent operation and maintenance according to claim 6, characterized in that: The torque vibration data processing module includes a differential amplifier, the first photoelectric sensor is electrically connected to the differential amplifier, and the differential amplifier can measure the speed of the rotating shaft.

8. The torsional vibration sensor for intelligent operation and maintenance according to claim 6, characterized in that: The torque vibration data processing module also includes a reference source and a comparator. The reference source is electrically connected to the comparator. The differential amplifier is electrically connected to the comparator. The comparator compares the torque vibration output by the differential amplifier with the reference source to obtain alarm information.

Images