Gravity block positioning method of gravity energy storage system

Abstract

The invention relates to the technical field of gravity energy storage systems, and discloses a gravity block positioning method of a gravity energy storage system, which comprises the following steps of: installing an RFID (Radio Frequency Identification) tag on the side wall of a load trolley, and arranging an RFID card reader at a key position of a track; collecting operation vibration data through a vibration sensor at the bottom of the load-carrying trolley; establishing a vibration feature library by recording the vibration frequency of each section of the load trolley track; comparing the vibration data of the operation of the load-carrying trolley with a preset track vibration feature library, and correcting the accurate position of the trolley in the section; a carrier frequency generator is arranged in the vibration sensor of each load-carrying trolley. According to the gravity block positioning method of the gravity energy storage system, accurate positioning of the load-carrying trolley is realized by combining RFID area positioning and a vibration feature identification technology. The vibration sensor at the bottom of the load-carrying trolley can collect vibration data during operation, and an adjustable carrier frequency generator is arranged in the vibration sensor, so that a unique vibration identifier can be generated for each trolley.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gravity energy storage systems, in particular to a gravity block positioning method of a gravity energy storage system. BACKGROUND

[0002] The precise positioning of the gravity block is crucial for the gravity energy storage system, involving safety, energy management, and system efficiency. In terms of safety control, the position of the load trolley must be monitored in real time to prevent derailment or collision accidents, especially at high speeds. The L-shaped hook and traction mechanism must always be reliably engaged. In terms of energy scheduling, accurate positioning is critical for intelligent switching of charge and discharge modes during peak and valley electricity price periods. Only by accurately determining the position of the gravity block can energy loss caused by misoperation be avoided. Meanwhile, precise position recognition can optimize system efficiency and prevent premature start-up of equipment when the load trolley is not in place, resulting in energy waste and equipment wear.

[0003] Currently, gravity energy storage systems mainly use mechanical limit switches, photoelectric sensor arrays, and low-frequency vibration detection for positioning. These traditional methods, although simple and easy to use, have obvious limitations. Mechanical sensors are prone to wear and tear, photoelectric detection is susceptible to environmental light interference, and vibration detection lacks reliability in complex working conditions.

[0004] Traditional vibration detection cannot distinguish multiple trolleys operating in the same frequency band, leading to identity confusion when multiple trolleys run in parallel. Additionally, it has poor anti-interference performance, as low-frequency vibration signals are easily affected by track inherent resonance and power frequency noise, causing positioning drift. These technical defects not only affect the safety and stability of system operation, but also reduce energy conversion efficiency.

[0005] Therefore, we propose a gravity block positioning method for a gravity energy storage system to solve the problems in the above background. SUMMARY

[0006] The present application provides a gravity block positioning method for a gravity energy storage system, which can solve the problem of traditional vibration detection being unable to distinguish multiple trolleys operating in the same frequency band, leading to identity confusion when multiple trolleys run in parallel.

[0007] To solve the above technical problems, the present application provides the following technical solutions:

[0008] A gravity block positioning method for a suspension cable track type gravity energy storage system, comprising: installing an RFID tag on the side wall of the load trolley and setting an RFID card reader at key positions on the track;

[0009] When the load trolley passes through the track section, the RFID card reader scans the tag to determine the area where the trolley is located;

[0010] The vibration sensor at the bottom of the load trolley collects the running vibration data; the vibration characteristic library is established by recording the vibration frequency of each section of the track of the load trolley;

[0011] The running vibration data of the load trolley is compared with the preset track vibration characteristic library, and the accurate position of the trolley in the section is corrected;

[0012] The vibration sensor of each load trolley is provided with a carrier frequency generator.

[0013] Preferably, the carrier frequency generator is a programmable frequency synthesizer, and a unique carrier frequency code is written into the carrier frequency generator when it is shipped.

[0014] A plurality of high-frequency vibration pickup sensors are arranged at equal intervals on the side wall of the track, and the plurality of high-frequency vibration pickup sensors form a detection node for receiving the carrier frequency of the carrier frequency generator.

[0015] Preferably, each load trolley is provided with a unique digital code, and the digital code of each load trolley is associated with a carrier frequency generator of a specific frequency.

[0016] The central controller pre-stores a mapping table of the digital code of each load trolley and the carrier frequency of the corresponding carrier frequency generator.

[0017] When a carrier frequency generator is detected to emit a carrier frequency, the mapping table is queried and the RFID tag ID is associated, and the RFID tag of the load trolley and the carrier frequency are doubly bound.

[0018] If an unregistered carrier frequency is detected, the track foreign object intrusion alarm is triggered.

[0019] Preferably, RFID card readers are arranged at equal intervals on the track, and the time for the load trolley to pass between two RFID card readers is monitored to calculate the speed of the load trolley in the section.

[0020] Preferably, the vibration characteristic library is established in the following manner: the empty load trolley is run on the track for three times, the vibration sensor collects the vibration data of the empty load trolley running on each section of the track, and the vibration frequency of the empty load trolley on each section is recorded; the load trolley is loaded with a gravity energy storage block and then run for five times, and the vibration change of the load trolley under different loads is recorded.

[0021] The vibration frequency data of the empty load trolley and the load trolley under different loads on each section of the track form the vibration characteristic library.

[0022] Preferably, the vibration data comparison method with the vibration feature library is that the vibration sensor collects the vibration signal of the running load trolley in real time to convert into vibration data, the reference vibration data corresponding to the current track section is retrieved from the vibration feature library according to the current track section determined by the RFID card reader, and comparison is performed;

[0023] When the matching degree reaches more than 90%, the accurate position of the load trolley in the track section is calculated in combination with the position and vibration data corresponding relationship stored in the vibration feature library;

[0024] If the matching degree is less than 90%, the carrier frequency verification mechanism is started or the positioning abnormality alarm is triggered.

[0025] Preferably, an audible and light alarm is installed on the track, and when the positioning error of the RFID and the vibration is more than 0.5 meters, the audible and light alarm is activated, the position abnormality signal is sent to the central controller, and the speed of the trolley is reduced through the suspension cable traction assembly of the energy storage system.

[0026] Preferably, a laser range finder is installed at the front and rear ends of the load trolley to monitor the distance from the adjacent load trolley in real time, and when the distance is less than 10 meters, the speed of the rear trolley is reduced through the traction wheel of the load trolley.

[0027] Preferably, the central controller updates the current vibration data after each successful matching to the feature library to realize automatic optimization of the feature library.

[0028] When the vibration data of a track section continuously exceeds the historical average value by more than 15% for 5 times, the system will automatically mark that the section needs to be repaired.

[0029] Preferably, the central controller includes a control host and a display screen, and through real-time integration of the interval positioning data from the RFID card reader, the vibration feature data of the vibration sensor and the carrier identity data of the high-frequency vibration pickup sensor, the position of each load trolley in each subzone of the track is displayed in real time, and the real-time running speed of the load trolley is synchronously displayed.

[0030] Compared with the prior art, the beneficial effects achieved by the present application are:

[0031] The present application combines the RFID area positioning technology and the vibration feature recognition technology, integrates a programmable frequency synthesizer in the vibration sensor of each load trolley to generate a vibration signal of a specific frequency in the range of 10 to 50 kHz, and ensures that the carrier frequency of each trolley is unique. The central controller pre-stores the mapping relationship between the carrier frequency and the digital code of the trolley, and when a specific carrier frequency is detected, the system can accurately associate the corresponding RFID tag ID to realize double identity verification.

[0032] First, install RFID tags on the side wall of the load trolley, and set RFID card readers at key positions of the track. When the trolley passes, the RFID card reader scans the tag to determine its area. At the same time, the vibration sensor at the bottom of the load trolley will collect the vibration data during operation. Through the built-in adjustable carrier frequency generator of the vibration sensor, a unique vibration identifier can be generated for each trolley. The adjustable carrier frequency generator can adjust the frequency range to 10-50 kHz. By pre-establishing the vibration characteristic library of each section of the track, the system can compare the real-time collected vibration data with the characteristic library, so as to correct the accurate position of the trolley in the section.

[0033] The scheme mainly solves the problems that the vibration signals of multiple trolleys in the same frequency band cannot be distinguished by traditional vibration detection method, and the positioning accuracy is greatly affected by environmental noise. The scheme realizes the identity distinction of multiple trolleys in the same frequency band through double identification of carrier frequency and RFID tag. And the interference of track resonance frequency band is avoided by using high-frequency carrier, which significantly improves the anti-interference ability. Further, through the accurate matching of the vibration characteristic library and the RFID auxiliary positioning, the influence of environmental noise on the positioning accuracy is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0034] Fig. 1 It is a real-time positioning method flow diagram of the application;

[0035] Fig. 2 It is a vibration characteristic library establishment flow diagram of the application. DETAILED DESCRIPTION

[0036] The specific embodiments of the application will be described in detail below, but it should be understood that the protection scope of the application is not limited by the specific embodiments.

[0037] Example one:

[0038] Please refer to Figs. 1-2 The application provides a technical solution:

[0039] A gravity block positioning method of a suspension cable track type gravity energy storage system, comprising: installing RFID tags on the side wall of the load trolley, and setting RFID card readers at key positions of the track;

[0040] When the load trolley passes through the track section, the RFID card reader scans the tag to determine the area of the trolley;

[0041] Collect the vibration data during operation through the vibration sensor at the bottom of the load trolley; and establish a vibration characteristic library by recording the vibration frequency of each section of the load trolley track;

[0042] Compare the vibration data of the load trolley during operation with the preset track vibration characteristic library, and correct the accurate position of the trolley in the section.

[0043] The vibration sensor of each load trolley is built-in with a carrier frequency generator.

[0044] Through the above scheme: by combining RFID area positioning and vibration feature recognition technology, the precise positioning of the load trolley is realized. In specific implementation, first, an RFID tag is installed on the side wall of the load trolley, and an RFID card reader is arranged at a key position of the track. When the trolley passes, the RFID card reader scans the tag to determine its area. At the same time, the vibration sensor at the bottom of the load trolley will collect the vibration data during operation. Through the built-in adjustable carrier frequency generator of the vibration sensor, a unique vibration identifier can be generated for each trolley. The adjustable carrier frequency generator can adjust the frequency range to 10-50 kHz. By pre-establishing the vibration feature library of each section of the track, the system can compare the real-time collected vibration data with the feature library, so as to correct the accurate position of the trolley in the section.

[0045] The scheme mainly solves the problem that the vibration signals of multiple trolleys in the same frequency band cannot be distinguished by the traditional vibration detection method of the suspension cable track type gravity energy storage gravity block, and the positioning accuracy is greatly affected by environmental noise. The scheme realizes the identity distinction of multiple trolleys in the same frequency band through the dual identification of carrier frequency and RFID tag. And by using the high-frequency carrier of 10-50 kHz to avoid the interference of the track resonance frequency band below 1 kHz, the anti-interference ability is significantly improved. Further, through the accurate matching of the vibration feature library and the RFID auxiliary positioning, the influence of environmental noise on the positioning accuracy is effectively reduced. In addition, this method does not need to modify the track structure, only needs to install the vibration sensor assembly, and is more convenient to use.

[0046] The carrier frequency generator is a programmable frequency synthesizer, and a unique carrier frequency code is written into the carrier frequency generator when it leaves the factory. A plurality of high-frequency vibration pickup sensors are equidistantly arranged on the side wall of the track, and the plurality of high-frequency vibration pickup sensors form a detection node for receiving the carrier frequency of the carrier frequency generator.

[0047] Each load trolley is provided with a unique digital code, and the digital code of each load trolley is associated with a carrier frequency generator of a specific frequency.

[0048] The central controller pre-stores a mapping table of carrier frequencies and load trolley digital codes; when the carrier frequency of a certain carrier frequency generator is detected, the mapping table is queried and the RFID tag ID is associated, to realize the dual identity binding of the RFID tag and the carrier frequency of the load trolley; if an unregistered carrier frequency is detected, an alarm of track foreign object intrusion is triggered.

[0049] In the above scheme, a programmable frequency synthesizer is arranged in each load trolley vibration sensor. The programmable frequency synthesizer can generate a vibration signal of a specific frequency in the range of 10 to 50 kHz, and is fixed to a unique frequency, for example 32.768 kHz, with an accuracy control within plus or minus 0.1%. When the load trolley is running, the vibration signal is converted into an electrical signal through a piezoelectric ceramic, and the carrier component is accurately extracted through a band-pass filter, effectively filtering out environmental noise. The high-frequency vibration pickup sensor arranged equidistantly on the track side wall collects signals at a sampling rate of 48 kHz, and analyzes the frequency spectrum characteristics through fast Fourier transform to accurately identify the carrier frequency peak. This design ensures that the vibration signals of different trolleys do not interfere with each other, and the high-frequency carrier avoids the inherent resonance frequency band of the track, greatly improving the anti-interference ability and reliability of signal recognition.

[0050] The implementation process of the above scheme is: each load trolley is assigned a unique digital code, which is strictly bound to the carrier frequency, for example, trolley A corresponds to 32.768 kHz, and the central controller pre-stores these mapping relationships. When the track sensor detects the carrier frequency, the central controller system queries the mapping table to match the frequency with the RFID tag ID, realizing the identity verification of the vibration carrier, digital code and RFID. When an unregistered frequency is detected and the deviation exceeds plus or minus 0.5%, an alien intrusion alarm is triggered immediately. Through the double verification mechanism, not only the problem of distinguishing multiple trolleys in the same frequency band is solved, but also illegal equipment or signal interference can be effectively identified. At the same time, through the functions of dynamic updating of vibration feature library and automatic alarm, the accuracy and safety of the positioning system are significantly improved, providing a reliable guarantee for the stable operation of the gravity energy storage system.

[0051] Further, RFID card readers are arranged equidistantly on the track to monitor the time of the load trolley passing between the two RFID card readers, and to calculate the speed of the load trolley in that section.

[0052] The establishment method of the vibration feature library is: running the empty load trolley in the U-shaped groove of the track for 3 times, the vibration sensor collects the vibration data of the empty load trolley running in each section of the track, and records the vibration frequency of the empty load trolley in each section; after loading the gravity energy storage block, the load trolley is run for 5 times, and the vibration change of the load trolley under different loads is recorded.

[0053] The vibration frequency data of the empty load trolley and the load trolley under different loads in each section of the track form the vibration feature library.

[0054] In the above scheme, first let the empty load trolley in the track U groove all the way to run 3 times, the vibration sensor will complete the record trolley in each track section vibration frequency data; then load the trolley with gravity energy storage block and then run test for 5 times, to obtain the vibration characteristics of different load conditions. In this way, the system can collect the complete vibration data of the trolley in each section of the track under the conditions of empty load and various loads, and form a vibration feature library after sorting and analyzing these data.

[0055] In the feature library, each track section will be assigned a unique vibration fingerprint feature, such as the buffer track section mainly showing low frequency vibration below 50 Hz, and the rising area showing medium frequency vibration characteristics of about 200 Hz. This feature library establishment method based on actual operation data ensures that the specific section and position of the trolley can be accurately identified during subsequent positioning comparison.

[0056] Example two:

[0057] Please refer to Figs. 1-2 , and combined with example one, it is further obtained that the vibration data and vibration feature library comparison method is: the vibration sensor converts the vibration signal of the trolley running into frequency spectrum data in real time, according to the current track section determined by the RFID card, the corresponding reference frequency spectrum data of the section is retrieved from the vibration feature library, and comparison is made;

[0058] When the matching degree reaches more than 90%, the accurate position of the trolley in the track section is calculated combined with the position and frequency spectrum corresponding relationship stored in the vibration feature library; for correcting the accurate position of the trolley in the section

[0059] If the matching degree is less than 90%, the carrier frequency verification mechanism is started or the positioning abnormal alarm is triggered.

[0060] Through the above scheme, after the system collects the vibration signal of the trolley in real time, the band pass filter is used to remove the environmental noise interference, and then the fast Fourier transform is used to convert the vibration signal into frequency spectrum data. According to the current track section determined by the RFID card, the system retrieves the standard frequency spectrum data of the section from the vibration feature library for comparison. When the matching degree of the real-time frequency spectrum data and the reference frequency spectrum is more than 90%, the system will combine the position and frequency spectrum data corresponding relationship in the feature library to calculate the accurate position of the trolley in the section. If the matching degree is less than 90%, the system will start the carrier frequency verification mechanism or trigger the positioning abnormal alarm, to ensure the accuracy of positioning.

[0061] Further, an audible and light alarm is installed on the track and is activated when the error between the RFID positioning and the vibration positioning exceeds 0.5 meters, triggering the following actions: activating the audible and light alarm; reducing the speed of the trolley through the suspension cable traction assembly; sending a position abnormality signal to the central controller; adding a laser range finder at the front and rear ends of the trolley to monitor the distance to the adjacent trolley in real time; and reducing the speed of the rear trolley through the traction wheel when the distance is less than 10 meters.

[0062] Further, the central controller updates the current vibration data after each successful match to the vibration feature library, achieving automatic optimization of the vibration feature library.

[0063] When the vibration data of a certain track section exceeds the historical average by more than 15% for 5 consecutive times, the system automatically marks the section for maintenance; the central controller includes a control host and a display screen, and through real-time integration of the interval positioning data from the RFID card reader, the vibration feature data from the vibration sensor, and the carrier identity data from the high-frequency vibration pickup sensor, the real-time running speed of each trolley in each track section is displayed in real time, and the real-time running speed of the trolley is synchronously displayed.

[0064] Through the above scheme, the central controller automatically updates the vibration data after each successful match to the feature library, so that the feature library is continuously optimized to maintain accuracy. When the vibration data of a certain track section exceeds the historical average by more than 15% for 5 consecutive times, the system automatically marks the section for maintenance, achieving intelligent track state monitoring.

[0065] The central controller integrates the interval positioning data from the RFID card reader, the vibration feature data from the vibration sensor, and the carrier identity data from the high-frequency vibration pickup sensor, and displays the accurate position and running speed of each trolley in each track section in real time through the control host and the display screen, providing a comprehensive monitoring view for the operator.

[0066] The above disclosure is only a few specific embodiments of the present application, but the embodiments of the present application are not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the scope of the present application.

Claims

1. A method for positioning gravity blocks in a cable-stayed gravity energy storage system, characterized in that... include: Install RFID tags on the side wall of the trolley and set up RFID readers at key locations on the track; When the loaded trolley passes through the track section, the RFID reader scans the tag to determine the area where the trolley is located. Vibration data is collected by vibration sensors at the bottom of the trolley; a vibration feature library is established by recording the vibration frequency of each section of the trolley track. The vibration data of the loaded trolley is compared with the preset track vibration feature library to correct the trolley's precise position in the section. Each load-bearing trolley has a vibration sensor with a built-in carrier frequency generator.

2. The gravity block positioning method for a gravity energy storage system according to claim 1, characterized in that: The carrier frequency generator is a programmable frequency synthesizer, and a unique carrier frequency code is written into the carrier frequency generator at the factory. Several high-frequency vibration pickup sensors are installed at equal intervals on the side wall of the track. These high-frequency vibration pickup sensors form a detection node to receive the carrier frequency from the carrier frequency generator.

3. The gravity block positioning method for a gravity energy storage system according to claim 2, characterized in that: Each load-bearing trolley is assigned a unique digital code, and each load-bearing trolley's digital code is associated with a carrier frequency generator of a specific frequency. The central controller has a pre-stored mapping table of the digital code of each load-bearing trolley and the carrier frequency of the corresponding carrier frequency generator; When a carrier frequency is detected to be emitted by a carrier frequency generator, the mapping table is queried and the RFID tag ID is associated to perform dual identity binding between the RFID tag of the heavy-duty vehicle and the carrier frequency. If an unregistered carrier frequency is detected, an intrusion alarm for foreign objects on the track will be triggered.

4. The gravity block positioning method for a gravity energy storage system according to claim 1, characterized in that: RFID readers are installed at equal intervals along the track to monitor the time between two RFID readers and estimate the speed of the trolley in that section.

5. The gravity block positioning method for a gravity energy storage system according to claim 4, characterized in that, The vibration feature library is established as follows: the unloaded loaded trolley runs on the track 3 times, the vibration sensor collects the vibration data of the unloaded trolley running in each section of the track, and records the vibration frequency of the unloaded loaded trolley in each section; the loaded trolley is loaded with gravity energy storage blocks and then runs 5 times, and the vibration changes of the loaded trolley under different loads are recorded. The vibration frequency data of unloaded and loaded trolleys at different loads on various sections of the track were compiled into a vibration feature library.

6. The gravity block positioning method for a gravity energy storage system according to claim 5, characterized in that, The method for comparing the vibration data with the vibration feature library is as follows: the vibration sensor collects the vibration signal of the load-bearing trolley in real time and converts it into vibration data. Based on the current track section determined by the RFID reader, the reference vibration data corresponding to that section is retrieved from the vibration feature library and compared. When the matching degree reaches 90% or more, the precise position of the load-bearing trolley in the track section is calculated by combining the correspondence between the position and vibration data stored in the vibration feature library. If the matching degree is less than 90%, the carrier frequency verification mechanism will be activated or a positioning anomaly alarm will be triggered.

7. The gravity block positioning method for a gravity energy storage system according to claim 1, characterized in that: An audible and visual alarm is installed on the track; when the error between RFID positioning and vibration positioning exceeds 0.5 meters, the audible and visual alarm is activated; a position abnormality signal is sent to the central controller, and the speed of the trolley is reduced through the suspension traction component of the energy storage system.

8. The gravity block positioning method for a gravity energy storage system according to claim 1, characterized in that: Laser rangefinders are installed at the front and rear of the load-bearing trolley to monitor the distance to adjacent load-bearing trolleys in real time; when the distance is less than 10 meters, the speed of the following trolley is reduced by using the traction wheels of the load-bearing trolley.

9. The gravity block positioning method for a gravity energy storage system according to claim 6, characterized in that: The central controller updates the current vibration data to the feature library after each successful match, thereby achieving automatic optimization of the feature library; When the vibration data of a certain track section exceeds the historical average by more than 15% for five consecutive times, the system will automatically mark that section as needing maintenance.

10. A gravity block positioning method for a gravity energy storage system according to any one of claims 1-9, characterized in that: The central controller includes a control host and a display screen. By integrating the interval positioning data from the RFID reader, the vibration characteristic data from the vibration sensor, and the carrier identification data from the high-frequency vibration pickup sensor in real time, it displays the position of each load-bearing trolley in each section of the track in real time and simultaneously displays the real-time running speed of the load-bearing trolley.

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