Multi-point transmission synchronism detection method and photovoltaic tracking system

Abstract

The invention relates to the technical field of photovoltaic tracking, and discloses a multi-point transmission synchronism detection method and a photovoltaic tracking system.The multi-point transmission synchronism detection method is applied to a mechanical multi-point driving type photovoltaic tracking system.The multi-point transmission synchronism detection method comprises the following steps that an induction module is arranged at a preset position of a transmission shaft, the sensing module senses the motion state of the transmission shaft at a preset position and sends out a corresponding feedback signal, and the preset position is located at one side end or two side ends, away from the driving unit, of the transmission shaft; a control module in the system is connected with the sensing module to obtain a feedback signal; when the driving unit moves, the control module judges whether the preset position of the transmission shaft is synchronous or not according to the acquisition condition of the feedback signal so as to control starting and stopping of the driving unit, and structural damage caused by non-synchronous movement is avoided by detecting the movement synchronism between the driving unit and the driven unit.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic tracking technology, and further relates to a multi-point transmission synchronization detection method and a photovoltaic tracking system. Background Art

[0002] With the rapid development of photovoltaic power generation technology, photovoltaic tracking systems have become a core component of large-scale ground-based power plants due to their significant advantages in improving power generation efficiency. To improve the reliability of tracking systems and reduce manufacturing costs, the industry is gradually promoting mechanical multi-point synchronous drive systems. These systems typically use a single drive unit (integrated motor and reducer) to drive a transmission shaft (such as a synchronous shaft or main shaft), transmitting power to multiple driven units, thereby achieving multi-point synchronous rotation.

[0003] However, practical applications still present certain limitations. Existing control systems typically monitor only the operating parameters of the drive unit, but lack real-time visibility into the working status of the driven unit or drive shaft. In some cases, such as when torque transmission is impeded due to damage to the driven unit or deformation or anomalies in the drive shaft, asynchronous motion can occur between the drive unit and the driven unit. Due to a lack of effective detection methods, these anomalies are difficult to detect in a timely manner, ultimately leading to distortion or even structural damage to the photovoltaic rack. Summary of the Invention

[0004] In response to the above technical problems, the purpose of this application is to provide a multi-point transmission synchronization detection method and a photovoltaic tracking system, which can detect the motion synchronization between the driving unit and the driven unit, avoid structural damage caused by asynchronous motion, and reduce operation and maintenance costs.

[0005] To achieve the above objectives, the present application provides a multi-point transmission synchronization detection method, which is applied to a mechanical multi-point drive photovoltaic tracking system. The photovoltaic tracking system includes a transmission shaft, a drive unit, and multiple driven units. The drive unit and the multiple driven units are arranged along a first direction and connected by the transmission shaft. The drive unit is used to drive the transmission shaft to rotate, and the driven units perform synchronous movement under the action of the transmission shaft. The multi-point transmission synchronization detection method includes the following steps:

[0006] a sensing module is disposed at a preset position of the transmission shaft, so that the sensing module senses the motion state of the transmission shaft at the preset position and emits a corresponding feedback signal, wherein the preset position is at one end or both ends of the transmission shaft away from the drive unit; and a control module is connected to the sensing module to obtain the feedback signal;

[0007] When the drive unit moves, the control module determines whether the preset position of the transmission shaft is synchronized according to the acquisition of the feedback signal, and controls the start and stop of the drive unit based on the determination result.

[0008] In some embodiments, before the sensing module senses the motion state of the transmission shaft at the preset position and issues a corresponding feedback signal, the signal output logic of the sensing module is set, and the output logic mode of the sensing module is:

[0009] When the sensing module senses the movement of the preset position, the sensing module sends the feedback signal continuously or intermittently;

[0010] When the sensing module does not sense the movement of the preset position, the sensing module does not send the feedback signal.

[0011] In some embodiments, when the drive unit moves, the control module determines whether the preset position of the transmission shaft is synchronized based on the acquisition of the feedback signal, specifically including:

[0012] If the control module receives the feedback signal from the sensing module, it determines that the preset position of the transmission shaft moves synchronously;

[0013] If the control module does not receive the feedback signal sent by the sensing module, it is determined that the preset position of the transmission shaft does not move synchronously.

[0014] In some embodiments, before the sensing module senses the motion state of the transmission shaft at the preset position and issues a corresponding feedback signal, the signal output logic of the sensing module is set, and the output logic mode of the sensing module is:

[0015] When the sensing module senses the movement of the preset position, the sensing module does not send the feedback signal;

[0016] When the sensing module does not sense the movement of the preset position, the sensing module sends the feedback signal continuously or intermittently.

[0017] In some embodiments, when the drive unit moves, the control module determines whether the preset position of the transmission shaft is synchronized based on the acquisition of the feedback signal, specifically including:

[0018] If the control module does not receive the feedback signal sent by the sensing module, determining that the preset position of the transmission shaft moves synchronously;

[0019] If the control module receives the feedback signal from the sensing module, it is determined that the preset position of the transmission shaft does not move synchronously.

[0020] In some embodiments, after determining that the preset position of the transmission shaft does not move synchronously, the following steps are included:

[0021] Triggering a protection mode of the photovoltaic tracking system, wherein the protection mode includes at least one of the following:

[0022] The first protection mode controls the driving unit to stop running;

[0023] The second protection mode controls the alarm module in the photovoltaic tracking system to sound an alarm to serve as a reminder;

[0024] In the third protection mode, the power supply module of the drive unit is controlled to stop supplying power.

[0025] In some embodiments, the sensing module has an independent power supply module, and the power supply module includes at least one of the following:

[0026] Low-light solar panels, suitable for solar power generation in low-light or backlight conditions;

[0027] A chemical battery pack is used to power the sensing module via a built-in battery.

[0028] In some embodiments, after the power level of the power supply module is lower than a preset value, the steps include:

[0029] The power supply module sends a low-battery signal to the control module. After receiving the low-battery signal, the control module controls the alarm module in the photovoltaic tracking system to sound an alarm.

[0030] In some embodiments, the driving unit is disposed at one end of the transmission shaft along the first direction, and the driven units are distributed along the transmission shaft on the same side of the driving unit to form a single-sided drive.

[0031] The transmission shaft is a main shaft or a synchronous shaft, and the preset position is located at an end portion of the main shaft or the synchronous shaft that is away from the driving unit.

[0032] Another aspect of the present application also provides a photovoltaic tracking system, comprising a transmission shaft, a drive unit, a plurality of driven units, a sensing module, and a control module, wherein the drive unit and the plurality of driven units are arranged along a first direction and connected via the transmission shaft, and the transmission shaft transmits power from the drive unit to the driven units to achieve multi-point synchronous motion;

[0033] The photovoltaic tracking system adopts the above-mentioned multi-point transmission synchronization detection method to perform transmission synchronization detection of the photovoltaic tracking system.

[0034] Compared with the prior art, the multi-point transmission synchronization detection method and photovoltaic tracking system provided by this application have the following beneficial effects:

[0035] This application places the sensing module at a preset position on the transmission shaft, at the end of the transmission shaft away from the drive unit, ensuring that the sensing module can monitor the motion state of the key position of the transmission shaft and issue feedback signals in a timely manner. The control module can obtain and process the feedback signals in real time to determine whether the preset position is synchronized. Based on this judgment, the control module can control the start and stop of the drive unit to avoid the drive asynchrony caused by failure of the driven unit in the prior art, thereby preventing the transmission shaft from being twisted, deformed, damaged, and other adverse effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present application.

[0037] Figure 1 This is a basic flow chart of a multi-point transmission synchronization detection method in one embodiment of the present application;

[0038] Figure 2 This is a judgment logic diagram in a first logic mode of a multi-point transmission synchronization detection method in one embodiment of the present application;

[0039] Figure 3 This is a judgment logic diagram in the second logic mode of a multi-point transmission synchronization detection method in one embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0041] To simplify the drawings, only the portions relevant to the application are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0042] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0043] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0046] With the rapid development of photovoltaic power generation technology, photovoltaic tracking systems have gradually become an important device for improving the power generation efficiency of photovoltaic power plants. In existing photovoltaic tracking bracket systems, many companies have adopted a mechanical multi-point synchronous drive system. This system uses an active drive unit (equipped with a drive motor) to drive the drive shaft, transmitting power to an undriven slave unit, thereby achieving synchronous drive of multiple slave units. In this way, the system can simultaneously adjust the position of multiple driven units to ensure that the photovoltaic panels can always follow the trajectory of the sun, maximizing the efficiency of photovoltaic power generation.

[0047] However, the existing system still has some technical problems. Specifically, in a mechanical multi-point drive system, once the driven unit fails or fails or the drive shaft deforms, the torque will not be able to be smoothly transmitted from the active drive unit to the driven unit, resulting in asynchrony between the active and driven parts. This asynchrony phenomenon will prevent the photovoltaic tracking bracket from working properly, thereby affecting the operating efficiency of the entire system. What is more serious is that since the current photovoltaic tracking bracket control system is usually unable to detect the working status of the driven part without a drive motor, once the driven unit fails, the control system cannot identify it in time and take appropriate remedial measures, which may cause the bracket to twist or structural damage, seriously affecting the stability and service life of the photovoltaic system.

[0048] Therefore, in response to the synchronization problems and insufficient fault detection problems existing in existing photovoltaic tracking bracket systems, the multi-point transmission synchronization detection method provided in this application can detect synchronization and improve the reliability of the system.

[0049] Reference Manual Figure 1 The present application provides a multi-point transmission synchronization detection method. Specifically, the method is applied to a mechanical multi-point drive photovoltaic tracking system. The photovoltaic tracking system includes a transmission shaft, a drive unit and multiple driven units. The drive unit and the multiple driven units are arranged along a first direction (the first direction is parallel to the extension direction of the transmission shaft), and the transmission shaft connects the drive unit and the multiple driven units. The drive unit is used to drive the transmission shaft to rotate, and the driven units move synchronously under the action of the transmission shaft to achieve multi-point synchronous motion.

[0050] Based on the above situation, the multi-point transmission synchronization detection method includes the following steps:

[0051] Step S1, configure a sensing module at a preset position of the transmission shaft, so that the sensing module senses the motion state of the transmission shaft at the preset position and sends a corresponding feedback signal, the preset position is at one end or both ends of the transmission shaft away from the driving unit; and connect the control module to the sensing module to obtain the feedback signal.

[0052] Step S2: When the drive unit moves, the control module determines whether the preset position of the transmission shaft is synchronized according to the acquisition of the feedback signal, and controls the start and stop of the drive unit based on the determination result.

[0053] In a mechanical multi-point drive photovoltaic tracking system, when there is a driven unit between the driving unit and the preset transmission shaft or the transmission shaft does not move synchronously (for example, the driven unit is damaged or the transmission shaft is deformed, resulting in the inability to transmit torque normally through the transmission shaft), the preset transmission shaft will also stop operating.

[0054] Therefore, when the preset position is located on one or both ends of the transmission shaft away from the drive unit, the sensing module can cover the entire transmission shaft range for synchronization monitoring, that is, it can perform synchronization detection on the driven units and transmission shafts of the entire photovoltaic tracking system. If any driven unit or transmission shaft between the drive unit and the transmission shaft at the end moves out of sync, the transmission shaft at the end will also stop moving, and the sensing module will send a corresponding feedback signal to the control module, so that the control module can detect the out-of-sync driven unit or transmission shaft.

[0055] In existing technologies, photovoltaic tracking systems often experience desynchronization due to failure of the driven unit or torque transmission issues, leading to distortion or component damage. This new technology, through real-time monitoring using one or two sensing modules, can detect problems before they occur and effectively prevent damage to the tracking structure by controlling the start and stop of the drive unit.

[0056] By selecting one or both ends of the transmission shaft, away from the drive unit, as the preset position, technicians can configure one or two sensing modules to achieve optimal synchronization detection. Furthermore, this reduces the number of data collection nodes and system maintenance complexity, making it suitable for large-scale deployment in large-scale photovoltaic power plants.

[0057] Of course, depending on user needs and cost factors, sensing modules can also be arranged at multiple points. Specifically, sensing modules are set at multiple locations on the drive shaft (for example, near multiple slave units), and each sensing module is responsible for monitoring the synchronization of its adjacent slave units. The control module analyzes the feedback signals from each sensing module to determine whether each slave unit is moving synchronously. In this way, the system can monitor the movement status in real time at multiple locations, further improving the accuracy of fault detection, and can determine the location of the abnormal slave unit, facilitating the maintenance of the photovoltaic tracking system. In this embodiment, there is no limit on the number of sensing modules.

[0058] Optionally, the sensing module is configured as a wireless sensor that can be connected to the control module via wireless communication. Traditional sensors usually need to be connected to the control module via physical cables, which not only increases the complexity of system wiring, but may also cause signal interruption or failure due to cable detachment or aging. With the use of wireless sensors, there is no need for cumbersome cable connections, which reduces the number of failure points in the system, reduces installation and maintenance costs, and improves flexibility and reliability. It should be noted that the position of the preset position can be adjusted in a targeted manner according to the different layout methods of the drive unit in the system.

[0059] When the drive unit is positioned next to or at one end of the drive shaft, a single-sided drive system is created. The driven units are located on the same side of the drive unit along the drive shaft, meaning power is transmitted from one end of the drive shaft to the other. In this case, the sensing module is pre-positioned at the end away from the drive unit, i.e., the other end of the drive shaft. Since the drive shaft's power is transmitted unidirectionally, only one sensing module is required on the end of the drive shaft away from the drive unit to monitor the synchronization of the entire photovoltaic tracking system and ensure system synchronization.

[0060] Conversely, when the drive unit is positioned in the middle of the transmission shaft, a dual-sided drive system is created. In this case, the driven units are distributed along the transmission shaft on either side of the drive unit, with power being transmitted from the center drive unit to both sides. Accordingly, the sensing modules are pre-positioned at the ends of the transmission shaft, away from the ends of the drive unit. Because power is transmitted from the center to the ends, if the movements on both sides are out of sync, uneven forces will be applied to both ends of the transmission shaft, affecting the stability of the entire photovoltaic tracking system. Therefore, by placing sensing modules at both ends, the synchronization status of the tracking system on both sides of the drive unit can be monitored separately, improving detection accuracy.

[0061] Based on the aforementioned single-sided drive scenario, the drive shaft can be a main shaft or a synchronous shaft. The preset position mentioned above is located at the end of the main shaft or synchronous shaft, away from the drive unit. It should be noted that regardless of whether the drive shaft is a main shaft or a synchronous shaft, the preset position is always selected at the shaft end. Since this position is farthest from the drive unit, the synchronization status of the shaft end can be accurately monitored, thereby determining whether there are synchronization issues with the entire photovoltaic tracking system.

[0062] In one embodiment, before instructing the sensing module to sense the motion state of the transmission shaft at the preset position and to issue a corresponding feedback signal in step S1, the signal output logic of the sensing module is first set. Specifically, the output logic mode of the sensing module (referred to herein as the first logic mode) is:

[0063] When the sensing module senses the movement of the preset position, the sensing module sends a feedback signal continuously or intermittently; when the sensing module does not sense the movement of the preset position, the sensing module does not send a feedback signal.

[0064] In contrast, in another embodiment, before instructing the sensing module to sense the motion state of the transmission shaft at the preset position and to issue a corresponding feedback signal in step S1, the signal output logic of the sensing module is first set. Specifically, the output logic mode of the sensing module (referred to herein as the second logic mode) is:

[0065] When the sensing module senses the movement of the preset position, the sensing module does not send out a feedback signal; when the sensing module does not sense the movement of the preset position, the sensing module sends out a feedback signal continuously or intermittently.

[0066] As can be appreciated, the above two embodiments optimize the signal output logic of the sensing module, further improving the accuracy of synchronization detection and enabling the system to more effectively respond to different operating conditions. By flexibly selecting the signal output logic mode, the system can flexibly adjust the signal output strategy based on specific operating conditions. This allows the system to effectively perform synchronization detection under different environmental conditions or with different photovoltaic tracking system configurations, ensuring the system's wide applicability.

[0067] Specifically, in the first logic mode, when the drive unit drives the transmission shaft in normal motion, the sensing module senses the movement of the transmission shaft at a preset position and issues a corresponding feedback signal. In some cases, the sensing module issues feedback signals at intervals based on a set period, or alternatively, it can issue signals continuously. If the sensing module does not sense movement of the transmission shaft at the preset position, no feedback signal is issued. This logic mode is suitable for real-time monitoring and confirmation of the synchronization status of the transmission shaft and the driven unit. When the drive unit is in motion, the system continuously receives feedback signals to verify the normal movement of the transmission shaft and the driven unit.

[0068] In the second logic mode, when the drive unit is moving the preset shaft normally, the sensing module will not generate any feedback signals. It will only generate feedback signals when the sensing module fails to sense shaft movement in the preset position. This logic mode is suitable for monitoring abnormal conditions, triggering system responses through the lack of feedback signals, prompting the system to conduct timely fault diagnosis and troubleshooting.

[0069] In practical applications, since both logic modes can be switched according to demand, in other words, operators can select the most appropriate logic mode under different environments, operating states or fault detection conditions.

[0070] In combination with the contents of the above embodiments, it can be further expanded to control the frequency of feedback signals emitted by the sensing module according to the needs of different working environments. For example, when the system requires higher precision, more frequent feedback signal triggering and judgment can be selected; in a more stable environment, the judgment interval of the feedback signal can be appropriately extended to reduce the system's power consumption and maintenance frequency.

[0071] In one embodiment, the first logic mode described above is further described. In this mode, in step S2, when the drive unit moves, the control module determines whether the preset position of the transmission shaft is synchronized based on the acquisition of the feedback signal. Figure 2 As shown, specifically including:

[0072] Step S21.1: If the control module receives a feedback signal from the sensing module, it determines whether the preset position of the transmission shaft is synchronously moving.

[0073] Step S21.2: If the control module does not receive the feedback signal from the sensing module, it is determined that the preset position of the transmission shaft does not move synchronously.

[0074] Correspondingly, in another embodiment, the second logic mode mentioned above is further described. In this mode, in step S2, when the driving unit moves, the control module determines whether the preset position of the transmission shaft is synchronized according to the acquisition of the feedback signal, such as Figure 3 As shown, specifically including:

[0075] Step S22.1: If the control module does not receive the feedback signal from the sensing module, it determines that the preset position of the transmission shaft is synchronously moving.

[0076] Step S22.2: If the control module receives the feedback signal from the sensing module, it determines that the preset position of the transmission shaft does not move synchronously.

[0077] It can be understood that for different logic modes, the judgment logic of the motion state of the preset position will also be adjusted accordingly. Different judgment logics correspond to the output logic mode of the set sensing module, so that the detection method of the present application can be applied to photovoltaic tracking systems in a variety of different environments or application scenarios.

[0078] Based on the above embodiment, after determining in step S21.2 or step S22.2 that the preset position of the transmission shaft does not move synchronously, the multi-point transmission synchronization detection method also includes the following steps: step S33, triggering the protection mode of the photovoltaic tracking system. The selection of the protection mode is based on the system operating status, the requirements of different application scenarios, and the severity of the fault, so as to ensure that effective protection measures are implemented without affecting the overall stability of the system.

[0079] Specifically, the protection modes include at least one of the following: the first protection mode is to control the drive unit to stop operating; the second protection mode is to control the alarm module in the photovoltaic tracking system to alarm to serve as a prompt; the third protection mode is to control the power supply module of the drive unit to stop supplying power.

[0080] In the first protection mode, it's understandable that upon detecting asynchronous motion, the most critical response is to immediately stop the drive shaft. This prevents distortion of the PV tracker structure, overloading of transmission components, or abnormal stress accumulation caused by the asynchronous motion. Therefore, in the first protection mode, the control module immediately sends a stop command to the drive unit, halting it and ensuring the drive shaft stops rotating.

[0081] For the second protection mode, the alarm module can be enabled to send an alarm signal to the management personnel to remind the operation and maintenance personnel to intervene. Generally, sound and light alarms, remote notifications, etc. can be used. In addition, information such as the number of alarms can be synchronously recorded in the work log as subsequent data support.

[0082] In the third protection mode, in more severe abnormal situations, in addition to stopping the drive unit, it is also necessary to fundamentally cut off its power supply to completely prevent the drive unit from malfunctioning or starting up due to software or hardware failures. The third protection mode controls the power supply module of the drive unit, causing it to stop supplying power, completely eliminating the possibility of the drive unit continuing to operate.

[0083] When using the third protection mode, the first protection mode is automatically executed. This means the system first stops the drive unit and then cuts off the power supply. However, the reverse is not necessarily true. Stopping the drive unit does not necessarily require an immediate power cut. For example, during a brief asynchrony, the system might only execute the first protection mode without immediately cutting off the power supply, allowing for quick resumption of normal operation after troubleshooting.

[0084] In different application scenarios, you can select the appropriate protection mode or combine different protection modes based on specific needs. For example, for short-term asynchronous issues, you can execute only the first protection mode, temporarily stopping the device until synchronization is confirmed and then resuming operation, thus reducing downtime. Similarly, for situations requiring manual intervention, you can execute both the first and second protection modes simultaneously, allowing operations personnel to receive alerts and take corrective measures as quickly as possible.

[0085] In one embodiment, the sensing module has an independent power supply module. Specifically, the present application proposes the following different power supply solutions.

[0086] In the first solution, the power supply module uses a low-light solar panel for solar power generation in low-light or backlight environments. Therefore, when the sensing module is located under the photovoltaic panel, it can still obtain energy through the surrounding scattered light or reflected light through this solar panel even in the case of incomplete sunlight; in the second solution, the power supply module uses a chemical battery pack. As a traditional battery power supply method, the chemical battery pack can provide a continuous power supply to the sensing module through the built-in battery. In an environment without sufficient light, the chemical battery can ensure the stable operation of the system and ensure that the sensing module can work normally at any time.

[0087] It should be noted that different power supply modules have different characteristics and can be flexibly selected according to the actual environment and application requirements.

[0088] Based on the current embodiment, further, when the power supply module of the sensing module is lower than the preset value, the multi-point transmission synchronization detection method of the present application further includes the steps of:

[0089] Step S40: Instruct the power supply module to send a low-battery signal to the control module. After receiving the low-battery signal, the control module controls the alarm module in the photovoltaic tracking system to sound an alarm.

[0090] After receiving the low-battery signal, the control module conducts a comprehensive analysis based on the system's current operating status. This analysis includes, but is not limited to, whether the system is currently operating under high load, lighting conditions, and the operating status of other modules. Based on the analysis results, the control module can directly control the alarm module to sound an alarm, alerting the user.

[0091] In addition, based on the above content, the control module can adjust the sensing module from the first logic mode to the second logic mode. In this mode, the sensing module sends a signal only when it does not sense the preset position, thereby reducing unnecessary signal output.

[0092] In one embodiment, according to another aspect of the present application, the present application further provides a photovoltaic tracking system, comprising a drive shaft, a drive unit, multiple driven units, a sensing module, and a control module. The drive unit and the multiple driven units are arranged along a first direction. The drive shaft connects the drive unit and the multiple driven units, transmitting power from the drive unit to the driven units to achieve multi-point synchronous motion. The sensing module is used to detect the motion state of the drive shaft, and the control module is used to receive feedback signals from the sensing module, analyze and determine whether there is a transmission inconsistency, and then adjust the system operating state.

[0093] Importantly, the system uses the multi-point transmission synchronization detection method mentioned above to perform transmission synchronization detection of the photovoltaic tracking system, detecting whether the movement of the transmission shaft at the preset position is synchronized, and avoiding mechanical damage or unnecessary system failure caused by asynchrony problems.

[0094] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the present application. It should be noted that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications should also be considered as the scope of protection of the present application.

Claims

1. A multi-point drive synchronization detection method, applied to a mechanical multi-point drive photovoltaic tracking system, characterized in that: The photovoltaic tracking system includes a transmission shaft, a drive unit, and a plurality of driven units. The drive unit and the plurality of driven units are arranged along a first direction and connected via the transmission shaft. The drive unit is used to drive the transmission shaft to rotate, and the driven units move synchronously under the action of the transmission shaft. The multi-point transmission synchronization detection method includes the following steps: a sensing module is disposed at a preset position of the transmission shaft, so that the sensing module senses the motion state of the transmission shaft at the preset position and emits a corresponding feedback signal, wherein the preset position is at one end or both ends of the transmission shaft away from the drive unit; and a control module is connected to the sensing module to obtain the feedback signal; When the drive unit moves, the control module determines whether the preset position of the transmission shaft is synchronized according to the acquisition of the feedback signal, and controls the start and stop of the drive unit based on the determination result.

2. The multi-point transmission synchronization detection method according to claim 1, characterized in that: Before the sensing module is caused to sense the motion state of the transmission shaft at the preset position and send a corresponding feedback signal, the signal output logic of the sensing module is set. The output logic mode of the sensing module is: When the sensing module senses the movement of the preset position, the sensing module sends the feedback signal continuously or intermittently; When the sensing module does not sense the movement of the preset position, the sensing module does not send the feedback signal.

3. The multi-point transmission synchronization detection method according to claim 2, characterized in that: The control module determines whether the preset position of the transmission shaft is synchronized according to the acquisition of the feedback signal when the drive unit moves, specifically including: If the control module receives the feedback signal from the sensing module, it determines that the preset position of the transmission shaft moves synchronously; If the control module does not receive the feedback signal sent by the sensing module, it is determined that the preset position of the transmission shaft does not move synchronously.

4. The multi-point transmission synchronization detection method according to claim 1, characterized in that: Before the sensing module is caused to sense the motion state of the transmission shaft at the preset position and send a corresponding feedback signal, the signal output logic of the sensing module is set. The output logic mode of the sensing module is: When the sensing module senses the movement of the preset position, the sensing module does not send the feedback signal; When the sensing module does not sense the movement of the preset position, the sensing module sends the feedback signal continuously or intermittently.

5. The multi-point transmission synchronization detection method according to claim 4, characterized in that: The control module determines whether the preset position of the transmission shaft is synchronized according to the acquisition of the feedback signal when the drive unit moves, specifically including: If the control module does not receive the feedback signal sent by the sensing module, determining that the preset position of the transmission shaft moves synchronously; If the control module receives the feedback signal from the sensing module, it is determined that the preset position of the transmission shaft does not move synchronously.

6. The multi-point transmission synchronization detection method according to claim 3 or 5, characterized in that: After determining that the preset position of the transmission shaft does not move synchronously, the method includes the following steps: Triggering a protection mode of the photovoltaic tracking system, wherein the protection mode includes at least one of the following: The first protection mode controls the driving unit to stop running; The second protection mode controls the alarm module in the photovoltaic tracking system to sound an alarm to serve as a reminder; In the third protection mode, the power supply module of the drive unit is controlled to stop supplying power.

7. The multi-point transmission synchronization detection method according to claim 6, characterized in that: The sensing module has an independent power supply module, and the power supply module includes at least one of the following: Low-light solar panels, suitable for solar power generation in low-light or backlight conditions; A chemical battery pack is used to power the sensing module via a built-in battery.

8. The multi-point transmission synchronization detection method according to claim 7, characterized in that: After the power of the power supply module is lower than a preset value, the method includes the following steps: The power supply module sends a low-battery signal to the control module. After receiving the low-battery signal, the control module controls the alarm module in the photovoltaic tracking system to sound an alarm.

9. The multi-point transmission synchronization detection method according to claim 1, characterized in that: The driving unit is arranged at one end of one side of the transmission shaft along a first direction, and the driven units are distributed along the transmission shaft on the same side of the driving unit to form a single-sided drive; The transmission shaft is a main shaft or a synchronous shaft, and the preset position is located at an end portion of the main shaft or the synchronous shaft that is away from the driving unit.

10. A photovoltaic tracking system, characterized in that: The invention comprises a transmission shaft, a driving unit, a plurality of driven units, a sensing module and a control module, wherein the driving unit and the plurality of driven units are arranged along a first direction and connected by the transmission shaft, and the transmission shaft transmits the power of the driving unit to the driven units to achieve multi-point synchronous motion; Wherein, the photovoltaic tracking system adopts the multi-point transmission synchronization detection method described in any one of claims 1 to 9 to perform transmission synchronization detection of the photovoltaic tracking system.

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