Mountain gravity energy storage transmission chain defect detection system and method

Abstract

The invention discloses a mountain gravity energy storage transmission chain defect detection system and method. The system comprises a magnetization unit, a magnetic flux detection unit, a signal processing unit and a data analysis unit. Wherein the magnetizing unit provides constant magnetic flux to magnetize the transmission chain; the magnetic flux detection unit detects the magnetic flux change in the transmission chain and the position coordinate of the transmission chain; the signal processing unit amplifies and digitalizes the signal captured by the magnetic flux detection unit; the data analysis unit is used for analyzing the signals processed by the signal processing unit so as to identify the damage condition of the transmission chain; according to the method, the damage state of the transmission chain is identified mainly by comparing the change conditions of the magnetic flux of the transmission chain and the magnetic flux of the health state transmission chain during online detection.

Description

Technical Field

[0001] The present invention belongs to the technical field of gravity energy storage, and specifically relates to a defect detection system and method for a transmission chain of mountain gravity energy storage. Background Art

[0002] Mountain gravity energy storage is one of the most promising gravity energy storage technologies at present. In existing mountain gravity energy storage systems, transmission chains are often used to transmit power between heavy blocks and electric generators. Due to the high strength requirements of high-power energy storage systems for transmission chains, the transmission chains are often in harsh working conditions under heavy loads. The fracture of the transmission chain will cause serious operation accidents. Therefore, it is necessary to regularly detect and replace the transmission chain, and frequent replacement results in huge operation and maintenance costs.

[0003] For the defect detection of the transmission chain, the traditional method is to conduct regular manual inspections, and rely on the experience of operation and maintenance personnel to judge whether there are defects in the transmission chain through observation or other means. This method is time-consuming and laborious. Especially in the field of mountain gravity energy storage, the transmission chain is long and numerous, and the inspection of the transmission chain incurs a large operation and maintenance cost. Therefore, there is an urgent need to propose a defect detection system and method for a transmission chain of mountain gravity energy storage to achieve accurate monitoring of the transmission chain of mountain gravity energy storage and accurately and timely report defects such as wear, corrosion, and local physical state degradation of the transmission chain. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides a defect detection system and method for a transmission chain of mountain gravity energy storage, which realizes real-time and automatic monitoring of the defect damage of the transmission chain.

[0005] The present invention is realized through the following technical solutions: The present invention provides a defect detection system for a transmission chain of mountain gravity energy storage, including a magnetization unit, a magnetic flux detection unit, a signal processing unit, and a data analysis unit; The magnetization unit is used to provide a constant magnetic flux to magnetize the transmission chain; The magnetic flux detection unit is used to detect the magnetic flux change in the transmission chain and the position coordinates of the transmission chain; The signal processing unit is used to amplify and digitize the magnetic flux change in the transmission chain detected by the magnetic flux detection unit and the position coordinate signal of the transmission chain; The data analysis unit is used to analyze the signal processed by the signal processing unit to obtain the damage condition of the transmission chain.

[0006] A further improvement of the present invention lies in that the magnetization unit adopts an electromagnet or a permanent magnet.

[0007] A further improvement of the present invention is that the magnetization unit is installed on the tension side of the drive sprocket of the power generation motor, close to it.

[0008] A further improvement of the present invention is that the magnetic flux detection unit is located at the same position as the magnetization unit along the moving direction of the drive chain. The magnetic flux detection unit detects magnetic flux information through a magnetic flux sensor, and detects the running distance of the drive chain through a speed sensor.

[0009] A further improvement of the present invention is that the signal processing unit obtains the data of the magnetic flux sensor transmitted by the magnetic flux detection unit, converts it into a digital signal, and then provides it to the data analysis unit.

[0010] A further improvement of the present invention is that the data analysis unit processes and analyzes the data collected by the signal processing unit, identifies and filters the magnetic flux changes caused by the vibration of the drive chain body, extracts the characteristic information related to the damage of the drive chain, and judges whether there is an abnormality in the health state of the drive chain by comparing and analyzing historical data and real-time data.

[0011] A further improvement of the present invention is that the drive chain defect detection system is installed on the tension side of the drive chain near the power generation motor in the mountain gravity energy storage, so as to reduce the influence of the drive chain vibration on the magnetic flux detection result.

[0012] The present invention also provides a method for detecting defects in the drive chain of mountain gravity energy storage. This method is based on the above-mentioned drive chain defect detection system for mountain gravity energy storage, and includes: After the drive chain defect detection system is installed, it is first debugged. After passing the debugging, online detection is carried out. The magnetization unit in the drive chain defect detection system provides a constant magnetic flux to magnetize the drive chain. The magnetic flux detection unit measures the change of the steady magnetic field, outputs a voltage signal, and records it as a voltage curve. The data analysis unit compares the data of the voltage curve with the data in the reference data set, and analyzes the degree of change of the voltage curve relative to the reference data set, so as to judge the damage position and degree of the drive chain.

[0013] A further improvement of the present invention is that during debugging, any point on the drive chain is arbitrarily marked as the coordinate origin, and at the same time, the displacement signal of the drive chain defect detection system is set to zero. Then, the mountain gravity energy storage system runs normally once, and it is ensured that the drive chain passes through the drive chain defect detection system at least once completely. The magnetic field change characteristics of the drive chain extracted by the data analysis unit are recorded as the reference data set.

[0014] A further improvement of the present invention is that during debugging, by using a comparison specimen, artificial damage is made on the drive chain of the comparison specimen, and the reference data set in the damaged state of the drive chain is collected.

[0015] Compared with the prior art, the present invention has at least the following beneficial technical effects: A defect detection system and method for a mountain gravity energy storage drive chain provided by the present invention can detect the defects of the mountain gravity energy storage drive chain in real time online. Compared with the traditional manual regular inspection, the damage detection accuracy and the acquisition frequency of damage data are improved, the labor cost is saved, and a defect damage report of the drive chain can be provided in a timely and effective manner, providing important data support for the fault warning system of the energy storage power station.

[0016] Furthermore, the present invention arranges a magnetization unit and a magnetic flux detection unit before and after the mountain gravity energy storage drive chain. When the drive chain operates normally, the magnetization unit magnetizes the drive chain to form a specific magnetic field on the drive chain. Then, when the magnetized part of the drive chain passes through the magnetic flux detection unit, the magnetic flux detection unit detects the characteristic parameters of the magnetic field, and further judges the structural and damage change conditions of the drive chain. When the mountain gravity energy storage unit operates, this magnetization and magnetic field detection process is real-time and continuous, and can continuously detect the damage condition of the drive chain, greatly improving the real-time performance and safety of the fault warning.

[0017] Furthermore, in order to reduce the vibration of the drive chain during the operation of the mountain gravity energy storage unit, the drive chain defect detection system is installed on the tension side of the drive chain near the power generation motor of the mountain gravity energy storage. At the same time, in order to reduce the influence of vibration on the accuracy of the detection result, the data analysis unit uses intelligent methods such as machine learning to analyze the real-time data and compare it with the initial historical data during commissioning and the historical data in the recent period, identify and filter the magnetic flux changes caused by the vibration of the drive chain, and extract the characteristic information related to the damage of the drive chain, thereby improving the accuracy of damage detection.

[0018] Furthermore, arbitrarily mark a certain point on the drive chain as the coordinate origin and determine it to be unchanged. At the same time, set the displacement signal of the drive chain defect detection system to zero. Then, record the running distance of the drive chain through a displacement sensor or a speed sensor, etc., and correspond the detected magnetic field characteristics of the drive chain (finally reflected as voltage signal data) with the position of the drive chain, so as to record the fault position of the drive chain, which provides convenience for subsequent diagnosis and repair and improves the diagnosis and repair efficiency.

[0019] Furthermore, during commissioning, that is, before the unit is put into production normally, the present invention records the magnetic field change characteristics of the drive chain extracted by the data analysis unit once as a reference data set. Because the drive chain has passed the factory test detection at this time, it can be determined that this reference data set is the magnetic field data characteristics of the drive chain in good health state. This characteristic includes the characteristic data after the superposition of the magnetic field and vibration factors of the drive chain, which provides a comparative standard data for the damage detection data analysis after production and improves the accuracy of damage detection.

[0020] Furthermore, during the debugging of the present invention, by using a comparison specimen, artificial damage is created on the drive chain of the comparison specimen, and a reference data set in the damaged state of the drive chain is collected to further improve the accuracy of damage detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a system schematic diagram of a mountain gravity energy storage drive chain defect detection system according to the present invention.

[0022] Figure 2 is a model schematic diagram of a mountain gravity energy storage drive chain defect detection system according to the present invention.

[0023] Figure 3 is an installation position schematic diagram of a mountain gravity energy storage drive chain defect detection system according to the present invention.

[0024] Description of Reference Numerals: 1 is a magnetization unit, 2 is a magnetic flux detection unit, 3 is a signal processing unit, 4 is a data analysis unit, and 5 is a drive chain; 5-1 is the tension side of the drive chain, 5-2 is the slack side of the drive chain, 6 is a driven wheel, 7 is a driving wheel, and 8 is a drive chain defect detection system. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are 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 thus should not be construed as a limitation of the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0028] In the present invention, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0030] It should also be understood that the terms used in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0031] It should be further understood that the term " / and" as used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0032] Various structural schematic diagrams according to the disclosed embodiments of the present invention are shown in the accompanying drawings. These figures are not drawn to scale, where for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art can additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0033] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Embodiment 1 As Figure 1 shown, a defect detection system for a mountain gravity energy storage drive chain provided in this embodiment includes a magnetization unit 1, a magnetic flux detection unit 2, a signal processing unit 3, and a data analysis unit 4.

[0035] The magnetization unit 1 is used to provide a constant magnetic flux to magnetize the drive chain 5; The magnetic flux detection unit 2 is used to detect the magnetic flux change in the drive chain 5 and the position coordinates of the drive chain 5; The signal processing unit 3 is used to amplify and digitize the magnetic flux change in the drive chain 5 detected by the magnetic flux detection unit 2 and the position coordinate signal of the drive chain 5; The data analysis unit 4 is used to analyze the signal processed by the signal processing unit 3 to obtain the damage condition of the drive chain 5.

[0036] In this embodiment, the magnetization unit 1 can be implemented by an electromagnet or a permanent magnet. The magnetization unit 1 is installed on the tension side of the drive sprocket close to the generator motor, so as to reduce the influence of the vibration of the drive chain 5 on the magnetic flux change.

[0037] In this embodiment, the magnetic flux detection unit 2 is located at the same position as the magnetization unit 1 along the movement direction of the drive chain 5. The magnetic flux information is detected by a magnetic flux sensor, and the magnetic flux signal is converted into an electrical signal.

[0038] In this embodiment, the magnetic flux detection unit 2 can be installed with a speed sensor or other displacement sensors to detect the running distance of the drive chain 5, so as to record the position information of the drive chain 5 corresponding to the magnetic flux signal. When the drive chain runs normally, the magnetization unit magnetizes the drive chain to form a specific magnetic field on the drive chain. Then, when the magnetized part of the drive chain passes through the magnetic flux detection unit, the magnetic flux detection unit detects the characteristic parameters of the magnetic field, and further judges the structural and damage change conditions of the drive chain.

[0039] In this embodiment, the signal processing unit 3 obtains the flux sensor data transmitted by the flux detection unit 2, converts it into a digital signal, and then provides it to the data analysis unit 4. The signal processing unit 3 requires high precision and high sampling rate.

[0040] In this embodiment, the signal processing unit 3 can be equipped with a signal amplifier as needed to better identify the flux change signal.

[0041] In this embodiment, the data analysis unit 4 can adopt artificial intelligence technologies such as big data and neural networks to improve the accuracy of identifying the damage state of the drive chain 5.

[0042] Embodiment 2 As Figure 1 shown, a defect detection system for a mountain gravity energy storage drive chain provided in this embodiment, the magnetization unit 1 can be realized by an electromagnet. During operation, a constant current is passed through, and an N pole and an S pole are formed at both ends of the magnetization unit 1, forming a strong magnetic field. The drive chain 5 made of steel moves in the magnetic field, and the magnetic field is affected by the drive chain 5, and the magnetic flux passing through the flux detection unit 2 will change.

[0043] As Figure 2 shown, the flux detection unit 2 is installed in the middle of the magnetic field formed by the magnetization unit 1 and wraps the drive chain 5. A drive chain displacement sensor is also configured on the flux detection unit 2, which can record the distance that the drive chain 5 moves out of the flux detection unit 2 in real time, so as to record the position information of the drive chain 5 corresponding to the flux signal. After converting the flux signal passing through the drive chain 5 into a voltage signal, the flux detection unit 2 sends it to the Figure 1 shown signal processing unit 3 together with the position information of the drive chain 5. The signal processing unit 3 further amplifies and processes the voltage signal, converts it into a digital signal, and then provides it to the data analysis unit 4. The data analysis unit 4 processes and analyzes the data collected by the signal processing unit 3, identifies and filters out the magnetic flux changes caused by the vibration of the drive chain 5 itself, extracts the characteristic information related to the damage of the drive chain 5, and these characteristic information may include changes in magnetic field strength, spectral characteristics, etc. By comparing and analyzing historical data and real-time data, it can be judged whether there is an abnormality in the health state of the drive chain 5.

[0044] As Figure 3As shown in the figure, the defect detection system for the transmission chain of mountain gravity energy storage is installed on the tension side 5-1 of the transmission chain near the driving wheel 7 to reduce the influence of the vibration of the transmission chain 5 on the magnetic flux detection result. Opposite to the tension side 5-1 of the transmission chain is the slack side 5-2 of the transmission chain. If a mountain gravity energy storage is equipped with multiple transmission chains 5, each transmission chain 5 needs to be equipped with a set of transmission chain defect detection systems 8. In this embodiment, the driving wheel 7 rotates clockwise, driving the driven wheel 6 to rotate through the transmission chain 5. The upper side of the transmission chain 5 is tensioned by the sprocket tension, so the upper side is the tension side. In order to reduce the influence of vibration on the accuracy of the detection result, the data analysis unit uses intelligent methods such as machine learning to analyze the real-time data and compare it with the initial historical data during debugging and the historical data in the recent period (such as 7 days), identify and filter out the magnetic flux changes caused by the vibration of the transmission chain, and extract the characteristic information related to the damage of the transmission chain, so as to improve the accuracy of damage detection.

[0045] Embodiment 3 A method for detecting defects in the transmission chain of mountain gravity energy storage provided in this embodiment includes: After the installation of the transmission chain defect detection system 8, debugging is carried out first. After passing the debugging, online detection is carried out. The magnetization unit 1 in the transmission chain defect detection system 8 provides a constant magnetic flux to magnetize the transmission chain 5. The magnetic sensor measures the change of the steady magnetic field, outputs a voltage signal, and records it as a voltage curve. The data analysis unit 4 compares the data of the voltage curve with the data in the reference data set, analyzes the degree of change of the voltage curve relative to the reference data set, so as to judge the damage position and damage degree of the transmission chain 5.

[0046] In this embodiment, during debugging, arbitrarily mark a point on the transmission chain 5 as the coordinate origin, and at the same time set the displacement signal of the transmission chain defect detection system 8 to zero. Then run the mountain gravity energy storage system normally once, so that the transmission chain 5 passes through the transmission chain defect detection system 8 completely once, and record the magnetic field change characteristics of the transmission chain 5 extracted by the data analysis unit 4 as the reference data set. This reference data set records the magnetic flux signal change curve corresponding to the position coordinates.

[0047] In this embodiment, in the case of higher requirements for the accuracy of online detection, a comparison specimen can be used to create artificial damage on the transmission chain 5 of the comparison specimen, and collect the reference data set in the damaged state of the transmission chain 5, so as to improve the accuracy of damage detection.

[0048] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For a person skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced by the present invention. Any reference signs in the claims should not be construed as limiting the claims concerned.

[0049] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. A person skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art. The above content is only to illustrate the technical idea of the present invention and cannot be used to limit the protection scope of the present invention. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the claims of the present invention.

Claims

1. A mountain gravity energy storage transmission chain defect detection system, characterized in that: It includes a magnetization unit, a magnetic flux detection unit, a signal processing unit and a data analysis unit; The magnetizing unit is used to provide a constant magnetic flux to magnetize the transmission chain; The magnetic flux detection unit is used to detect the magnetic flux change in the transmission chain and the position coordinates of the transmission chain; The signal processing unit is used to amplify and digitally process the magnetic flux change in the transmission chain and the position coordinate signal of the transmission chain detected by the magnetic flux detection unit; The data analysis unit is used to analyze the signal processed by the signal processing unit to obtain the damage condition of the transmission chain.

2. A mountain gravity energy storage transmission chain defect detection system according to claim 1, characterized in that: The magnetizing unit adopts an electromagnet or a permanent magnet.

3. A mountain gravity energy storage transmission chain defect detection system according to claim 2, characterized in that: The magnetizing unit is mounted on the tensioning side of the drive sprocket close to the generator motor.

4. A mountain gravity energy storage transmission chain defect detection system according to claim 1, characterized in that: The magnetic flux detection unit is located at the same position of the magnetization unit along the moving direction of the transmission chain. The magnetic flux detection unit detects magnetic flux information through a magnetic flux sensor and detects the running distance of the transmission chain through a speed sensor.

5. A mountain gravity energy storage transmission chain defect detection system according to claim 4, characterized in that: The signal processing unit obtains the magnetic flux sensor data transmitted by the magnetic flux detection unit, converts the data into digital signals, and then provides the digital signals to the data analysis unit.

6. A mountain gravity energy storage transmission chain defect detection system according to claim 1, characterized in that: The data analysis unit processes and analyzes the data collected by the signal processing unit, identifies and filters the changes in magnetic flux caused by the vibration of the transmission chain body, extracts characteristic information related to transmission chain damage, and determines whether there is any abnormality in the health status of the transmission chain by comparing and analyzing historical data and real-time data.

7. A mountain gravity energy storage transmission chain defect detection system according to claim 1, characterized in that: The transmission chain defect detection system is installed on the tensioning side of the transmission chain near the generator motor of the mountain gravity energy storage to reduce the influence of the transmission chain vibration on the magnetic flux detection results.

8. A method for detecting defects in a mountain gravity energy storage transmission chain, characterized in that: The method is based on a mountain gravity energy storage transmission chain defect detection system according to any one of claims 1 to 7, comprising: After the transmission chain defect detection system is installed, it is debugged first. After the debugging is qualified, online detection is carried out. The magnetization unit in the transmission chain defect detection system provides a constant magnetic flux to magnetize the transmission chain. The magnetic flux detection unit measures the change of the steady magnetic field and outputs it as a voltage signal, which is recorded as a voltage curve. The data analysis unit compares the data of the voltage curve with the data in the reference data set, and analyzes the degree of change of the voltage curve relative to the reference data set, thereby judging the damage location and degree of the transmission chain.

9. A method for detecting defects in a mountain gravity energy storage transmission chain according to claim 8, characterized in that: During debugging, mark any point on the transmission chain as the coordinate origin, set the displacement signal of the transmission chain defect detection system to zero, and then operate the mountain-type gravity energy storage system normally, and ensure that the transmission chain passes through the transmission chain defect detection system at least once completely, and record the transmission chain magnetic field change characteristics extracted by the data analysis unit as a reference data set.

10. A method for detecting defects in a mountain gravity energy storage transmission chain according to claim 8, characterized in that: During debugging, artificial damage is created on the transmission chain of the comparison sample by using the comparison sample, and a reference data set under the damaged state of the transmission chain is collected.

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