Precast concrete segment eccentricity warning device and method

Abstract

The present invention belongs to the technical field of wind power equipment maintenance, and specifically discloses a precast concrete segment eccentricity warning device and method, comprising a signal processing module, an early warning module, several groups of signal transmitters and several groups of signal receivers, the several groups of signal transmitters being arranged in stacked precast concrete segments, each precast concrete segment being provided with a group of signal transmitters, and a group of signal receivers being provided on the bottom surface below each group of signal transmitters, the signal output ends of the several groups of signal receivers being connected to the signal input ends of the signal processing module, and the signal output ends of the signal processing module being connected to the signal input ends of the early warning module. The present invention sets several groups of signal transmitters and several groups of signal receivers to monitor and warn of the eccentricity of the precast concrete segments. When the eccentricity of the precast segment exceeds the allowable range, the signal processing module generates an early warning signal to control the operation of the early warning device, prompting that the eccentricity of the precast concrete segment exceeds the threshold value and there is an operational risk.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power equipment maintenance, and in particular relates to a precast concrete segment eccentricity early warning device and method. Background Art

[0002] Compared to steel towers, concrete towers can address transportation challenges and the resonance issues associated with steel structures. Precast concrete towers offer advantages such as high flexibility in design, production, and construction, low maintenance requirements, and are particularly well-suited for wind farms with high wind shear, helping to increase power generation. Currently, precast prestressed steel-concrete composite towers and precast prestressed concrete towers have become key research and development areas in the wind power industry.

[0003] However, during the production, installation, and operation of precast concrete segments, the alignment errors between the upper end of the lower segment and the lower end of the upper segment accumulate over time, causing some segments to shift and become eccentric. This segment shift and eccentricity directly alters the load distribution within the tower. If the wind turbine suddenly shuts down or experiences extreme wind speeds, the tower's stability and safety will be significantly compromised, potentially leading to tower tilt or even collapse. Summary of the Invention

[0004] The purpose of the present invention is to provide a precast concrete segment eccentricity warning device and method to solve the technical problem that the accumulated stacking errors between the existing precast concrete segments lead to eccentricity that endangers the safety of the tower.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions:

[0006] In a first aspect, a precast concrete segment eccentricity warning device includes a signal processing module, an early warning module, several groups of signal transmitters and several groups of signal receivers, wherein the several groups of signal transmitters are used to be arranged in stacked precast concrete segments, each precast concrete segment is provided with a group of signal transmitters, and a group of signal receivers is provided on the bottom surface below each group of signal transmitters, and the signal output ends of the several groups of signal receivers are connected to the signal input end of the signal processing module, and the signal output end of the signal processing module is connected to the signal input end of the early warning module.

[0007] A further improvement of the present invention is that each of the several groups of signal transmitters includes an X-axis infrared transmitter and a Y-axis infrared transmitter, and each of the several groups of signal receivers includes an X-axis infrared receiver and a Y-axis infrared receiver.

[0008] A further improvement of the present invention is that a gap exists between the bottom surface projections of two adjacent groups of signal transmitters.

[0009] A further improvement of the present invention is that the effective receiving diameter of the signal receiver is larger than the effective transmitting diameter of the signal transmitter.

[0010] A further improvement of the present invention is that the transmission frequencies of the signal transmitters in the groups are different.

[0011] A further improvement of the present invention is that the early warning device is an operation and maintenance center console.

[0012] A further improvement of the present invention is that each group of the signal transmitters is arranged on the middle inner wall of the precast concrete segment.

[0013] A further improvement of the present invention is that: when the signal processing module is working, it first determines whether there is a signal receiver that has not received a signal, and then determines whether the frequency of the signal received by the signal receiver is the same as that of the corresponding signal transmitter.

[0014] In a second aspect, a precast concrete segment eccentricity warning method comprises the following steps:

[0015] When the signal receiver does not receive the signal, the signal processing module controls the early warning module to issue an early warning;

[0016] When the signal received by the signal receiver does not match the corresponding signal transmitter, the signal processing module controls the early warning module to issue an early warning;

[0017] When the signal received by the signal receiver matches the corresponding signal transmitter, no warning is given.

[0018] A further improvement of the present invention is that: when the signal receiver does not receive a signal, the signal processing module controls the early warning module to issue an early warning;

[0019] When the signal received by the signal receiver does not match the corresponding signal transmitter, the signal processing module controls the early warning module to issue an early warning, specifically including:

[0020] Obtaining a ratio of signal receivers that do not receive a signal to the total number of signal receivers as a first probability;

[0021] Obtaining a ratio of signal receivers whose received signals do not match the corresponding signal transmitters to the total number of signal receivers as a second probability;

[0022] Add the first probability and the second probability to obtain the probability based on the early warning;

[0023] When the warning is based on probability ∈ [0, 25%], the signal processing module controls the warning module to issue a low-risk warning;

[0024] When the warning is based on probability ∈(25%, 50%], the signal processing module controls the warning module to issue a medium-risk warning;

[0025] When the warning is based on probability ∈(50%, 1], the signal processing module controls the warning module to issue a high-risk warning.

[0026] Compared with the prior art, the present invention has at least the following beneficial effects:

[0027] 1. The present invention is equipped with several groups of signal transmitters and several groups of signal receivers to monitor and warn the eccentricity of precast concrete segments. When the eccentricity of the precast segment exceeds the allowable range, the signal processing module generates an early warning signal to control the operation of the early warning device, indicating that the eccentricity of the precast concrete segment exceeds the threshold and there is an operational risk.

[0028] 2. There is a gap between the bottom projections of two adjacent groups of signal transmitters in the present invention to prevent signal obstruction;

[0029] 3. The transmission frequencies of several groups of signal transmitters of the present invention facilitate determination of whether a shift occurs;

[0030] 4. Install a row of infrared receivers at the bottom of the tower to receive the infrared rays emitted by the infrared transmitters on the precast concrete segments. The effective receiving diameter of each receiver is larger than the diameter of the infrared rays. Each receiver is matched with a transmitter. The receiver has the function of identifying the infrared emission frequency to distinguish the signals emitted by different precast concrete segments.

[0031] 5. The present invention first preliminarily determines whether the precast concrete segment has undergone eccentric displacement based on the reception status of the signal receiver: when a receiver does not receive any infrared rays, the transmitter corresponding to this receiver has produced a displacement within the allowable range, that is, the precast concrete segment has undergone obvious displacement; when receiving a signal, it determines whether it matches the infrared emission frequency received by the receiver. If it does not match, it indicates that the precast concrete segment has undergone obvious displacement.

[0032] 6. The present invention evaluates the eccentricity risk level based on the proportion of signal receivers that have not received signals to the total number of signal receivers and the proportion of signal receivers whose received signals do not match the corresponding signal transmitters to the total number of signal receivers. The greater the number, the greater the eccentricity risk level. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0034] In the attached figure:

[0035] Figure 1 This is a front view of a precast concrete segment eccentricity warning device according to the present invention;

[0036] Figure 2 This is a top view of a precast concrete segment eccentricity warning device according to the present invention;

[0037] Figure 3 The present invention provides a flow chart of a precast concrete segment eccentricity warning method.

[0038] In the figure: 1. First precast concrete segment; 2. First Y-direction infrared emitter; 3. First X-direction infrared emitter; 4. Second precast concrete segment; 5. Second Y-direction infrared emitter; 6. Second X-direction infrared emitter; 7. Third precast concrete segment; 8. Third Y-direction infrared emitter; 9. Third X-direction infrared emitter; 10. Fourth precast concrete segment; 11. Fourth Y-direction infrared emitter; 12. Fourth X-direction infrared emitter; 13. First X-direction infrared receiver; 14. Second X-direction infrared receiver; 15. Third X-direction infrared receiver; 16. Fourth X-direction infrared receiver. DETAILED DESCRIPTION

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0040] The following detailed description is an exemplary description and is intended to provide further detailed description of the present invention. Unless otherwise indicated, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used in the present invention are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention.

[0041] Example 1

[0042] A precast concrete segment eccentricity warning device is arranged in the stacked precast concrete segments, such as Figure 1-2 Shown, including:

[0043] Signal processing module, early warning module, several groups of signal transmitters and several groups of signal receivers;

[0044] Several groups of signal transmitters and several groups of signal receivers are used to be arranged in the stacked precast concrete segments. Each precast concrete segment is provided with a group of signal transmitters, and each group of signal transmitters is provided with a group of signal receivers on the same vertical line. The signal output ends of the several groups of signal receivers are connected to the signal input ends of the signal processing module, and the signal output ends of the signal processing module are connected to the signal input ends of the early warning module.

[0045] Specifically, each group of signal receivers is arranged at the bottom of the stacked precast concrete segments.

[0046] Specifically, there is a gap between the bottom projections of adjacent signal transmitters. By setting the gap when installing different groups of signal transmitters, there is only one group of signal transmitters on the same vertical line, which avoids the signal being blocked by other signal transmitters and causing inaccurate warning.

[0047] Specifically, different groups of signal transmitters have different transmission frequencies. If the frequency received by the signal receiver is different from the frequency emitted by the corresponding signal transmitter, the signal processing module determines that the precast concrete segment is offset.

[0048] Specifically, each group of signal transmitters includes an X-axis infrared transmitter and a Y-axis infrared transmitter, and each group of signal receivers includes an X-axis signal receiver and a Y-axis signal receiver. The X-axis infrared transmitter and the Y-axis infrared transmitter are arranged in the middle of the inner wall of the precast concrete segment;

[0049] The X-axis receiver and the Y-axis receiver are arranged at the bottom of the stacked precast concrete segments.

[0050] Specifically, the early warning device is an early warning device such as a buzzer, an indicator light or an operation and maintenance center console. When the early warning device is an operation and maintenance center console, personnel can be directly arranged to inspect and maintain it.

[0051] Specifically, the number of the X-axis infrared transmitter, the Y-axis infrared transmitter, the X-axis infrared receiver, and the Y-axis infrared receiver is the same as the number of the stacked precast concrete segments;

[0052] Specifically, an X-axis infrared transmitter and a Y-axis infrared transmitter are provided on the inner wall of each precast concrete segment, and the infrared emitting ends of each X-axis infrared transmitter and each Y-axis infrared transmitter are downward. The infrared emitting ends of the X-axis infrared transmitters on different precast concrete segments are not on the same vertical line, and the infrared emitting ends of the Y-axis infrared transmitters on different precast concrete segments are not on the same vertical line. Several X-axis infrared receivers are arranged at the bottom of the stacked concrete segments, and each X-axis infrared receiver is on the same vertical line as an X-axis infrared transmitter. Several Y-axis infrared receivers are arranged at the bottom of the stacked concrete segments, and each Y-axis infrared receiver is on the same vertical line as a Y-axis infrared transmitter.

[0053] Specifically, the data processing module is used to control the operation of the early warning module according to the signals from several groups of signal receivers.

[0054] Specifically, the effective receiving diameter of the signal receiver is larger than the effective transmitting diameter of the signal transmitter to avoid invalid warning. The difference between the effective receiving diameter and the effective transmitting diameter is the first threshold. The first threshold represents an acceptable deviation, and the size of the first threshold is calculated based on actual conditions.

[0055] Specifically, when the data processing module is working, it makes judgments based on the reception status of several groups of signal receivers. When there is a signal receiver that has not received the signal, it is judged that an offset has occurred. The data processing module sends an early warning signal to control the early warning module to issue an early warning. When several groups of signal receivers all receive the signal, it is judged whether the signal frequency received by the signal receiver matches. If not, it is judged that an offset has occurred. The data processing module sends an early warning signal to control the early warning module to issue an early warning. If they match, it is normal.

[0056] Specifically, the X-axis signal transmitter and the Y-axis signal transmitter are respectively perpendicular to the center of the precast concrete segment so that the displacement of the precast concrete segment can be described in a plane. If there is only one, when the precast concrete segment swings and deviates with the transmitter as the center, it is impossible to provide an effective warning of the deviation result.

[0057] Example 2

[0058] A precast concrete segment eccentricity warning device is set up in actual engineering, which is used for a structure with four precast concrete segments stacked, such as Figure 1-2 As shown, the precast concrete segment stacking structure is, from top to bottom, a first precast concrete segment 1, a second precast concrete segment 4, a third precast concrete segment 7, and a fourth precast concrete segment 10. A first Y-axis infrared emitter 2 is provided on the inner wall of the first precast concrete segment 1 along the Y-axis direction; a first X-axis infrared emitter 3 is provided on the inner wall of the first precast concrete segment 1 along the X-axis direction.

[0059] A second Y-axis infrared emitter 5 is provided on the inner wall of the second precast concrete segment 4 to the left / right below the first Y-axis infrared emitter 2, and a second X-axis infrared emitter 6 is provided on the inner wall of the second precast concrete segment 4 to the left / right below the first X-axis infrared emitter 3;

[0060] A third Y-axis infrared emitter 8 is provided on the inner wall of the third precast concrete segment 7 to the left / right below the second Y-axis infrared emitter 5, and a third X-axis infrared emitter 9 is provided on the inner wall of the third precast concrete segment 7 to the left / right below the second X-axis infrared emitter 6.

[0061] A fourth Y-axis infrared emitter 11 is provided on the inner wall of the fourth precast concrete segment 10 to the left / right below the third Y-axis infrared emitter 8, and a fourth X-axis infrared emitter 12 is provided on the inner wall of the fourth precast concrete segment 10 to the left / right below the third X-axis infrared emitter 9;

[0062] A first Y-axis infrared receiver is provided on the bottom surface directly below the first Y-axis infrared transmitter 2;

[0063] A second Y-axis infrared receiver is provided on the bottom surface directly below the second Y-axis infrared transmitter 5;

[0064] A third Y-axis infrared receiver is provided on the bottom surface directly below the third Y-axis infrared transmitter 8;

[0065] A fourth Y-axis infrared receiver is provided on the bottom surface directly below the fourth Y-axis infrared transmitter 11;

[0066] A first X-axis infrared receiver 13 is provided on the bottom surface directly below the first X-axis infrared transmitter 3;

[0067] A second X-axis infrared receiver 14 is provided on the bottom surface directly below the second X-axis infrared transmitter 6;

[0068] A third X-axis infrared receiver 15 is provided on the bottom surface directly below the third X-axis infrared transmitter 3;

[0069] A fourth X-axis infrared receiver 16 is provided on the bottom surface directly below the fourth X-axis infrared transmitter 3 .

[0070] The deflection angles of the first X-axis infrared emitter 3, the second X-axis infrared emitter 6, the third X-axis infrared emitter 9 and the fourth X-axis infrared emitter 12 are the same;

[0071] The deflection angles of the first Y-axis infrared emitter 2, the second Y-axis infrared emitter 5, the third Y-axis infrared emitter 8 and the fourth Y-axis infrared emitter 11 are the same;

[0072] The emission frequencies of the first X-axis infrared emitter 3, the second X-axis infrared emitter 6, the third X-axis infrared emitter 9, the fourth X-axis infrared emitter 12, the first Y-axis infrared emitter 2, the second Y-axis infrared emitter 5, the third Y-axis infrared emitter 8 and the fourth Y-axis infrared emitter 11 are all different.

[0073] The infrared emitters installed on each precast concrete segment are located in the middle of the segment. Looking along the length of the tower wall, the emitters are staggered to prevent mutual obstruction and potential impact on early warning effectiveness.

[0074] Example 3

[0075] A precast concrete segment eccentricity warning method, such as Figure 3 As shown, the following steps are included:

[0076] When the signal receiver does not receive the signal, the signal processing module controls the early warning module to issue an early warning;

[0077] When the signal received by the signal receiver does not match the corresponding signal transmitter, the signal processing module controls the early warning module to issue an early warning;

[0078] When the signal received by the signal receiver matches the corresponding signal transmitter, no warning is given.

[0079] Specifically, when there is a signal receiver that does not receive a signal, the signal processing module controls the early warning module to issue an early warning;

[0080] When the signal received by the signal receiver does not match the corresponding signal transmitter, the signal processing module controls the early warning module to issue an early warning, specifically including:

[0081] Obtaining a ratio of signal receivers that do not receive a signal to the total number of signal receivers as a first probability;

[0082] Obtaining a ratio of signal receivers whose received signals do not match the corresponding signal transmitters to the total number of signal receivers as a second probability;

[0083] Add the first probability and the second probability to obtain the probability based on the early warning;

[0084] When the warning is based on probability ∈ [0, 25%], the signal processing module controls the warning module to issue a low-risk warning;

[0085] When the warning is based on probability ∈(25%, 50%], the signal processing module controls the warning module to issue a medium-risk warning;

[0086] When the warning is based on probability ∈(50%, 1], the signal processing module controls the warning module to issue a high-risk warning.

[0087] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A precast concrete segment eccentricity warning device, characterized in that: include: A signal processing module is used to obtain the matching results of each group of signal receivers and issue an early warning control instruction when a signal receiver fails to receive a signal or when a signal received by a signal receiver does not match a corresponding signal transmitter; The early warning module is arranged in the operation and maintenance center and is electrically connected to the signal processing module, and is used to receive the early warning control instructions issued by the signal processing module to issue an early warning; Several groups of signal transmitters and several groups of signal receivers, wherein the several groups of signal transmitters are arranged in the stacked precast concrete segments, each precast concrete segment is provided with a group of signal transmitters, a group of signal receivers is provided below each group of signal transmitters, and each group of signal receivers is arranged at the bottom of the stacked precast concrete segments, the signal output ends of the several groups of signal receivers are connected to the signal input ends of the signal processing modules, and the signal output ends of the signal processing modules are connected to the signal input ends of the early warning modules; Each of the plurality of groups of signal transmitters includes an X-axis infrared transmitter and a Y-axis infrared transmitter, and each of the plurality of groups of signal receivers includes an X-axis infrared receiver and a Y-axis infrared receiver; There is a gap between the bottom surface projections of two adjacent groups of signal transmitters; The effective receiving diameter of the signal receiver is larger than the effective transmitting diameter of the signal transmitter.

2. The precast concrete segment eccentricity warning device according to claim 1, characterized in that: The transmission frequencies of the signal transmitters in the groups are different.

3. The precast concrete segment eccentricity warning device according to claim 1, characterized in that: The early warning module is the operation and maintenance center console.

4. The precast concrete segment eccentricity warning device according to claim 1, characterized in that: Each group of signal transmitters is arranged on the middle inner wall of the precast concrete segment.

5. The precast concrete segment eccentricity warning device according to claim 2, characterized in that: When the signal processing module is working, it first determines whether there is a signal receiver that has not received a signal, and then determines whether the frequency of the signal received by the signal receiver is the same as that of the corresponding signal transmitter.

6. A precast concrete segment eccentricity warning method, implemented based on the precast concrete segment eccentricity warning device according to claim 1, characterized in that: The following steps are involved: When the signal receiver does not receive the signal, the signal processing module controls the early warning module to issue an early warning; When the signal received by the signal receiver does not match the corresponding signal transmitter, the signal processing module controls the early warning module to issue an early warning; When the signal received by the signal receiver matches the corresponding signal transmitter, no warning is given.

7. The precast concrete segment eccentricity warning method according to claim 6, characterized in that: When the signal receiver does not receive a signal, the signal processing module controls the early warning module to issue an early warning; When the signal received by the signal receiver does not match the corresponding signal transmitter, the signal processing module controls the early warning module to issue an early warning, specifically including: Obtaining a ratio of signal receivers that do not receive a signal to the total number of signal receivers as a first probability; Obtaining a ratio of signal receivers whose received signals do not match the corresponding signal transmitters to the total number of signal receivers as a second probability; Add the first probability and the second probability to obtain the probability based on the early warning; When the warning is based on probability ∈ [0, 25%], the signal processing module controls the warning module to issue a low-risk warning; When the warning is based on probability ∈ (25%, 50%], the signal processing module controls the warning module to issue a medium-risk warning; When the warning is based on probability ∈ (50%, 100%], the signal processing module controls the warning module to issue a high-risk warning.

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