An energy self-consistent device and detection method for vehicle-mounted detection

Abstract

The application discloses an energy self-consistent device and a detection method for vehicle detection, belongs to the technical field of mechanical design and signal analysis, and effectively solves the technical problem that the running state of a train cannot be perceived without power supply. The device comprises a ring belt, a shell, an inner cover, a main shaft, a rotating assembly, energy conversion balls and a rotor. The top of the shell is open, a center through hole is arranged in the center of the bottom of the shell, the inner cover is provided with a center through hole, the main shaft passes through the center through hole of the inner cover, a plurality of compartments are formed between the shell and the rotor and are distributed in the circumferential direction along the central axis of the main shaft, one energy conversion ball is arranged in each compartment, the ring belt is arranged on the inner wall of the shell corresponding to the horizontal position of the rotor, and the main shaft is a stepped shaft. The application effectively transmits vibration characteristics, has compact structure, high expandability, high sensitivity to the change of characteristics, stable work, high reliability, and can effectively record the vibration characteristics of the environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mechanical design and signal analysis, and particularly relates to an energy self-consistent device and a detection method for vehicle detection. BACKGROUND

[0002] The energy self-consistent device is evolved from new energy collection equipment, and is currently used in passive Internet of Things and wireless sensor networks. The device aims to convert environmental energy into electrical energy based on the consistency of the electrical signals generated by the device, and at the same time, to perceive and transmit the state characteristics of the environment in which the device is located. Such a device that integrates power supply and sensing has a significant effect on improving energy conversion efficiency and adapting to complex and variable detection environments. Currently, in the field of wind energy collection, wind turbines based on electromagnetic generation or friction generation principles are used for wind energy collection and wind field sensing. When the wind field changes, the rotation characteristics of the wind turbine change, and this change is also mapped to the power generation module by relying on the built-in power generation principle, so that the electromagnetic or friction generates an electrical signal that also contains the characteristics of the wind field change. At the same time, the feature is transmitted to the computer for analysis while providing energy for the communication component. In the field of mechanical energy collection, such as rail transit systems, energy self-consistent devices based on friction, electromagnetic, and piezoelectric power generation are often used as sensors to receive the vibrations generated by the wheel-rail coupling of the train running. At the same time of capturing the vibration energy and converting it into electrical energy, the vibration characteristics contained in the electrical signal are perceived.

[0003] Currently, the design and research of energy self-consistent devices are mainly published in SCI international journals in related fields. The existing technology designs a friction nanogenerator (TENG) embedded in the tooth surfaces of the planetary wheel and the sun wheel for a planetary gear reducer. When the wheel train is engaged, the transfer of electrons generates an electrical signal, which maps the engagement characteristics in the gear meshing to the electrical signal while providing energy. Machine learning algorithms are combined to extract and identify the fault state of the planetary wheel train. In an article about wind energy collection, a TENG based on a separate contact type is designed. When the wind turbine rotates, the rotational motion is converted into linear reciprocating motion, generating a potential difference between the electrodes of different TENGs and thus generating an electrical signal. Due to the change of the wind field, the rotation of the wind turbine changes, which also makes the change characteristics of the wind field contained in the electrical signal, and the change of the wind speed is analyzed based on this.

[0004] At present, the energy self-consistent device being researched needs to perceive the environment, so the design is mainly suitable for fixed use scene, which also leads to the difficulty of generalization of energy self-consistent devices in different fields. In addition, the existing design for energy self-consistent device is limited to the perception of a certain working state, which is difficult to expand and has limitations. In addition, there are wide application scenarios for monitoring scenes that need to arrange wireless sensor networks, such as on-board monitoring of heavy-haul trains, medical care, wearable health monitoring, etc. Therefore, it is necessary to design an energy self-consistent device which is easy to modularize, simple in structure and strong in expandability. SUMMARY

[0005] In view of the problems in the prior art, the present application provides an energy self-consistent device for vehicle detection and a detection method, which aims to effectively solve the technical problem of perceiving the running state of the train when there is no power supply.

[0006] The technical scheme adopted by the present application is as follows:

[0007] An energy self-consistent device for vehicle detection, comprising: a ring belt, a shell, an inner cover, a main shaft, a rotating assembly, an energy conversion ball and a rotor, the inner cover is installed inside the shell, the top of the shell is open, a center through hole is formed in the center of the bottom of the shell, the inner cover is provided with a center through hole, the main shaft passes through the center through hole of the inner cover, the main shaft is installed in cooperation with the inner cover, the rotating assembly is installed on the upper part of the main shaft, the rotating assembly is located above the inner cover, the rotor is installed on the lower part of the main shaft, the rotor is located below the inner cover, the radius of the rotor is smaller than the radius of the shell, a plurality of compartments are formed between the shell and the rotor along the central axis of the main shaft and are distributed circumferentially, one energy conversion ball is arranged in each compartment, the ring belt is installed on the inner wall of the shell corresponding to the horizontal position of the rotor, and the main shaft is a stepped shaft.

[0008] Preferably, it further comprises a first support bearing and a second support bearing, the first support bearing and the second support bearing are installed in cooperation with the center through hole of the inner cover, and the main shaft passes through the first support bearing and the second support bearing and is installed in cooperation with the first support bearing and the second support bearing.

[0009] Preferably, it further comprises a third support bearing, the third support bearing is installed in cooperation with the center through hole of the shell, and the main shaft passes through the third support bearing and is installed in cooperation with the third support bearing.

[0010] Preferably, the ring belt comprises a first ring belt and a second ring belt, the first ring belt and the second ring belt are installed on the inner wall of the shell corresponding to the horizontal position of the rotor in an interlaced manner.

[0011] Further, the first ring belt and the second ring belt have a rectangular tooth-shaped interval, and are symmetrically and staggeredly arranged.

[0012] Preferably, the ring belt is made of metal.

[0013] Preferably, the plurality of compartments are evenly distributed in the circumferential direction of the central axis of the main shaft.

[0014] Preferably, the rotor is a rotating disc having a central hole and a plurality of vanes evenly arranged in the circumferential direction of the central hole, and the vanes and the shell form the compartments.

[0015] Preferably, the energy conversion ball is a PTFE ball.

[0016] A train operation state detection method for vehicle detection, comprising the following steps:

[0017] S1: installing an energy self-consistent device for vehicle detection on the upper surface of the middle of the side frame of the train bogie;

[0018] S2: reflecting the wheel-rail coupling characteristics of the corresponding train based on the vibration characteristics of the side frame of the bogie, converting the vibration characteristics of the side frame of the bogie into corresponding characteristic electric signals through the energy self-consistent device, and transmitting the corresponding characteristic electric signals to a remote terminal;

[0019] S3: the remote terminal combines the LSTM deep learning algorithm to analyze the characteristics of the wheel-rail coupling in the train running process, and judges the running state of the train.

[0020] In summary, the beneficial effects of the present application are as follows:

[0021] 1. The present application adopts a pendulum to receive inertial kinetic energy, effectively transmits vibration characteristics, and is not limited to the field of rail transportation in application scenarios, but can also be expanded to wearable health monitoring and medical care;

[0022] 2. The present application is packaged as a flat cylinder, fully utilizes the space structure, has a compact structure, a single device can be used as a wireless Internet of Things node, and can be expanded to a wireless sensor network with multiple nodes, and has strong expandability.

[0023] 3. The present application adopts a friction power generation principle, a PTFE ball and two copper ring belts form a TENG, a rotor, a PTFE ball and a copper belt form a rolling bearing structure, can generate electric energy to provide energy while having high sensitivity to changes in characteristics, is stable in work, has high reliability, and can effectively record the vibration characteristics of the environment. BRIEF DESCRIPTION OF DRAWINGS

[0024] The present application will be described by way of example and with reference to the accompanying drawings, in which:

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 for Figure 1 Longitudinal cross-sectional structural diagram;

[0027] Icons: 1-First ring belt, 2-House, 3-Inner cover, 4-Main shaft, 5-Rotating assembly, 6-Energy ball, 7-Rotor, 8-First support bearing, 9-Second support bearing, 10-Second ring belt, 11-Third support bearing. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] The following is combined Figure 1 , Figure 2 The present invention will be described in detail below.

[0031] Example

[0032] An energy self-consistent device for vehicle detection, comprising: a ring belt, a shell 2, an inner cover 3, a main shaft 4, a rotating assembly 5, an energy conversion ball 6, a rotor 7, the inner cover 3 is installed in the inside of the shell 2, the top of the shell 2 is open, the bottom center of the shell 2 is provided with a center through hole, the inner cover 3 is provided with a center through hole, the main shaft 4 passes through the center through hole of the inner cover 3, the main shaft 4 is matched with the inner cover 3, the rotating assembly 5 is installed on the upper part of the main shaft 4, the rotating assembly 5 is above the inner cover 3, the rotor 7 is installed on the lower part of the main shaft 4, the rotor 7 is below the inner cover 3, the radius of the rotor 7 is smaller than the radius of the shell 2, a plurality of compartments are formed between the shell 2 and the rotor 7, which are distributed circumferentially along the central axis of the main shaft 4, an energy conversion ball 6 is arranged in each compartment, the ring belt is installed on the inner wall of the shell 4 corresponding to the horizontal position of the rotor 7, and the main shaft 4 is a stepped shaft. It also includes a first support bearing 8 and a second support bearing 9, the first support bearing 8 and the second support bearing 9 are matched with the center through hole of the inner cover 3, and the main shaft 4 passes through the first support bearing 8 and the second support bearing 9 and is matched with the first support bearing 8 and the second support bearing 9. It also includes a third support bearing 11, the third support bearing 11 is matched with the center through hole of the shell 2, and the main shaft 4 passes through the third support bearing 11 and is matched with the third support bearing 11. The ring belt comprises a first ring belt 1 and a second ring belt 10, the first ring belt 1 and the second ring belt 10 are arranged alternately on the inner wall of the shell 4 corresponding to the horizontal position of the rotor 7. The first ring belt 1 and the second ring belt 10 have rectangular tooth-shaped intervals, and are symmetrically and alternately arranged between the first ring belt 1 and the second ring belt 10. The ring belt is made of metal material. The plurality of compartments are evenly distributed circumferentially along the central axis of the main shaft 4. The rotor 7 is a rotating disc with a central hole and a plurality of fan blades arranged circumferentially around the central hole, and the fan blades and the shell 2 form a compartment. The energy conversion ball 6 is a PTFE material ball.

[0033] A train operation state detection method for vehicle detection, comprising the following steps:

[0034] S1: installing an energy self-consistent device for vehicle detection on the upper surface of the middle of the train bogie side frame;

[0035] S2: reflecting the corresponding wheel-rail coupling characteristics of the train based on the vibration characteristics of the bogie side frame, converting the vibration characteristics of the bogie side frame into corresponding characteristic electric signals by the energy self-consistent device, and transmitting the corresponding characteristic electric signals to a remote terminal;

[0036] S3: the remote terminal combines the LSTM deep learning algorithm to analyze the characteristics of wheel-rail coupling in the train running process, and judges the operation state of the train.

[0037] The specific principle is that the energy self-consistent device is arranged on the upper surface of the middle of the train bogie side frame, when the train runs, the high-frequency reciprocating vibration characteristics are generated due to the wheel-rail coupling of the bogie side frame, and the vibration acceleration is generated, due to the inertia moment of the rotating assembly 5, which makes the rotating assembly 5 generate reciprocating swing, the main shaft 4 and the rotating assembly 5 are connected through the key, the rotor 7 and the main shaft 4 are connected through the key, the reciprocating swing is converted into the reciprocating rotation of the main shaft 4, and the reciprocating rotation of the rotor 7 is realized by the main shaft 4. The energy conversion ball 6 is placed in the compartment formed by the rotor 7 and the shell 2, so that the energy conversion ball 6 is pushed by the rotor 7, and the energy conversion ball 6 rolls while rotating as a whole. And the energy conversion ball 6 in the rotating process, alternately contacts between the first ring belt 1 and the second ring belt 10 which are staggered, due to the principle of friction power generation, a potential difference is generated between the staggered first ring belt 1 and the second ring belt 10, thereby generating an alternating current signal. The fluctuation characteristics of the electric signal are essentially derived from the motion characteristics of the energy conversion ball 6, and the motion characteristics of the energy conversion ball 6 are essentially transmitted by the rotating assembly 5, and the motion characteristics of the rotating assembly 5 are derived from the vibration characteristics of the bogie side frame, and the vibration characteristics of the bogie side frame are derived from the wheel-rail coupling characteristics of the train, thereby realizing the mapping of the wheel-rail coupling characteristics to the electric signal. The alternating current is stored by rectification to provide energy for the communication module, and at the same time, the consistency of the electric signal can also be used as the electric signal sent to the remote terminal, and the wheel-rail coupling characteristics in the train running process are analyzed by combining the LSTM deep learning algorithm to judge the state of the train running.

[0038] When the electric signal containing the train vibration characteristics is sent to the remote terminal, part of the electric signal noise is removed through wavelet denoising, and then the instantaneous frequency and spectral entropy of the signal are extracted as the characteristic signal. The critical steady speed of the train is used as the judgment condition of the snake instability. In this example, the label of the electric signal generated by the device under the critical steady speed of the train is defined as normal, and vice versa. After the characteristic signal is classified by using the label, the whole characteristic signal is equally sliced and arranged as a data set. The LSTM deep learning model is trained using the data set, and when the device generates an electric signal during operation, the running state of the current train is analyzed by using the trained LSTM model.

[0039] An energy self-consistent device for vehicle detection, comprising a shell 2 and an inner cover 3, the outer diameter of the inner cover 3 is interference fit with the inner diameter of the shell 2, and the lower end surface of the inner cover 3 is limited by the upper surface of the inner step of the shell 2.

[0040] The transmission system of the present application is composed of a rotating assembly 5, a main shaft 4, a rotor 7 and a PTFE ball 6 as shown in Figure 1 and Figure 2 The rotating assembly of the present application is a pendulum.

[0041] In the device, the coaxial line of the main shaft 4, the center through hole of the pendulum, and the rotation center of the rotor 7 is located in the center of the whole device, both ends of the main shaft 4 are provided with shaft shoulders, and the shaft shoulders are provided with stepped shafts with keys on the upper and lower sides; the pendulum is a fan-shaped pendulum with a center through hole; the rotor 7 is a rotating disc with a center through hole and uniformly provided with fan blades around; the ring belt material is copper, the ring belt has a rectangular tooth-shaped interval, and the first ring belt 1 and the second ring belt 10 are symmetrically and staggeredly arranged. The center through hole of the pendulum is connected with the key of the main shaft 4, the lower part of the shaft shoulder of the main shaft 4 is connected with the center through hole of the rotor 7 and is in interference fit, the first ring belt 1 and the second ring belt 10 are bonded and matched with the lower part of the inner stepped part of the shell 2, the energy conversion ball 6 is made of PTFE material, and the energy conversion ball 6 is uniformly distributed in the interval between the blades of the rotor 7.

[0042] On the support of each part, the inner diameter of the bottom hole of the shell 2 is in interference fit with the outer ring of the third support bearing 11, the outer diameter of the inner cover 3 is in interference fit with the inner diameter of the shell 2, the lower end surface of the inner cover 3 is limited by the upper surface of the inner stepped part of the shell 2, the inner diameter of the center through hole of the inner cover 3 is in interference fit with the outer ring of the first support bearing 8 and the second support bearing 9, the inner ring of the first support bearing 8 and the second support bearing 9 is matched with the front part of the shaft shoulder of the main shaft 4, and the lower end stepped part of the main shaft 4 is in interference fit with the inner ring of the third support bearing 11.

[0043] The geometric size of the first ring belt 1 and the second ring belt 10 is the same, and both have 20 rectangular teeth.

[0044] The number of the energy conversion balls 6 is 12.

[0045] The number of the blades of the rotor 7 is 12.

[0046] The specific principle of the embodiment is:

[0047] The energy self-consistent device is arranged on the upper surface of the middle of the train bogie side frame. When the train runs, the side frame of the bogie generates high-frequency reciprocating vibration characteristics due to the wheel-rail coupling effect, generating vibration acceleration. Due to the setting of the pendulum moment of inertia, the pendulum generates reciprocating swing. Since the main shaft 4 and the pendulum are connected by a key, and the rotor 7 and the main shaft 4 are connected by a key, the reciprocating swing is converted into the reciprocating rotation of the main shaft 4, and the reciprocating rotation of the rotor 7 is realized by the main shaft 4. The energy conversion ball 6 is placed between the blades of the rotor 7, so that the energy conversion ball 6 is pushed by the rotor 7, and rolls while rotating as a whole. And the energy conversion ball 6 in the rotating process, in the first ring belt 1 and the second ring belt 10 alternately contact through the alternately staggered first ring belt 1 and the second ring belt 10, due to the principle of friction power generation, the potential difference between the staggered first ring belt 1 and the second ring belt 10 is generated, thereby generating an alternating current signal. The fluctuation characteristics of the electric signal are essentially derived from the motion characteristics of the energy conversion ball 6, and the motion characteristics of the energy conversion ball 6 are essentially transmitted by the pendulum. The motion characteristics of the pendulum are derived from the vibration characteristics of the side frame of the bogie, which are derived from the wheel-rail coupling characteristics of the train, realizing the mapping of the wheel-rail coupling characteristics to the electric signal. The alternating current is stored by rectification to provide energy for the communication module, and at the same time, the consistency of the electric signal can also be used as an electric signal sent to a computer, combined with the LSTM deep learning algorithm to analyze the characteristics of the wheel-rail coupling during the train running process to determine the state of the train running.

[0048] The principle of distinguishing the running state of the train is as follows:

[0049] When the electric signal containing the vibration characteristics of the train is sent to the computer, the wavelet denoising is used to remove part of the electric signal noise, and then the instantaneous frequency and spectral entropy of the signal are extracted as the characteristic signal. The critical steady speed of the train is used as the criterion for judging the snake instability. In this example, the label of the electric signal generated by the device running below the critical steady speed of the train is defined as normal, and vice versa. After classifying the characteristic signals using the label, the entire characteristic signal is equally sliced and arranged as a data set. The LSTM deep learning model is trained using the data set. When the device generates an electric signal during operation, the running state of the current train is analyzed by the trained LSTM model.

[0050] The above-described embodiments only express the specific implementation of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the protection scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the technical concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. An energy self-consistent device for vehicle detection, characterized by, It comprises: The inner cover (3) is installed in the inside of the shell (2), the top of the shell (2) is open, the bottom center of the shell (2) is provided with a center through hole, the inner cover (3) is provided with a center through hole, the main shaft (4) passes through the center through hole of the inner cover (3), the main shaft (4) is installed in cooperation with the inner cover (3), the rotating assembly (5) is installed on the upper part of the main shaft (4), the rotating assembly (5) is located above the inner cover (3), the rotor (7) is installed on the lower part of the main shaft (4), the rotor (7) is located below the inner cover (3), the radius of the rotor (7) is less than the radius of the shell (2), the shell (2) and the rotor (7) form a plurality of compartments which are distributed along the central axis of the main shaft (4) circumferentially, each compartment is provided with an energy conversion ball (6), the ring belt is installed on the inner wall of the shell (2) corresponding to the horizontal position of the rotor (7), and the main shaft (4) is a stepped shaft; The ring belt comprises: a first ring belt (1) and a second ring belt (10), the first ring belt (1) and the second ring belt (10) are installed on the inner wall of the shell (2) corresponding to the horizontal position of the rotor (7) in an interlaced arrangement; The first ring belt (1) and the second ring belt (10) have a rectangular tooth shape interval, and are symmetrically and interlacedly arranged between the first ring belt (1) and the second ring belt (10); The rotor (7) is a rotating disc with a center hole and a plurality of fan blades uniformly arranged circumferentially around the center hole, and the fan blades and the shell (2) form a compartment.

2. The energy self-consistent device for vehicle detection according to claim 1, wherein, It also comprises a first support bearing (8) and a second support bearing (9), the first support bearing (8) and the second support bearing (9) are installed in cooperation with the center through hole of the inner cover (3), and the main shaft (4) passes through the first support bearing (8) and the second support bearing (9) and is installed in cooperation with the first support bearing (8) and the second support bearing (9).

3. The energy self-consistent device for vehicle detection of claim 1, wherein, It also comprises a third support bearing (11), the third support bearing (11) is installed in cooperation with the center through hole of the shell (2), and the main shaft (4) passes through the third support bearing (11) and is installed in cooperation with the third support bearing (11).

4. The self-consistent energy device for on-board detection according to any one of claims 1-3, characterized in that, The ring belt is made of metal material.

5. The energy self-consistent device for vehicle detection of claim 1, wherein, The plurality of compartments are uniformly distributed circumferentially along the central axis of the main shaft (4).

6. The energy self-consistent device for vehicle detection of claim 1, wherein, The energy conversion ball (6) is a spherical body made of PTFE material.

7. A train operation state detection method for onboard detection, characterized by, It comprises the following steps: S1: install the energy self-consistent device for vehicle detection as claimed in any one of claims 1-6 on the upper surface of the middle of the train bogie side frame; S2: based on the vibration characteristics of the bogie side frame reflecting the corresponding wheel-rail coupling characteristics of the train, converting the vibration characteristics of the bogie side frame into corresponding characteristic electric signals through the energy self-consistent device, and transmitting the corresponding characteristic electric signals to the remote terminal; S3: the remote terminal combines the LSTM deep learning algorithm to analyze the characteristics of wheel-rail coupling in the train running process, and judges the running state of the train.

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