A signal acquisition cabinet in a constant-temperature wind power load test process

Abstract

The utility model relates to the technical field of wind power equipment, specifically for a signal acquisition cabinet in the process of constant temperature's wind power load test, including the cabinet, is connected with the cabinet door through hinged structure on the cabinet, is provided with signal acquisition equipment in the cabinet, is provided with cooling equipment on the back of cabinet, is provided with the temperature -rising equipment on the cabinet door, the cabinet is fixedly connected with the wind power tower through the anti -resonance structure, the utility model discloses through many temperature -control structures can realize the high accuracy control to the temperature in the cabinet, avoids the signal acquisition error that produces because of temperature drift, can reduce the impact of resonance to electronic component through the setting anti -resonance structure, prolongs the equipment life and restrains signal noise, the utility model discloses still through dispersing system parts and modularization integrated combination, can simplify maintenance repair cost and difficulty, promotes installation and repair efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wind power equipment technology, specifically a signal acquisition cabinet for a constant-temperature wind power load testing process. Background Technology

[0002] In the structural design of wind turbine generator sets, it is necessary to fully understand and accurately grasp the design load. While loads can be predicted during the design phase, due to defects and uncertainties in the prediction model, accurate load data needs to be verified through actual load testing. During wind power load testing, a signal acquisition cabinet is required to monitor various data of the wind power during test operation in real time over a long period of time. Since wind power projects need to operate for extended periods, they will inevitably encounter the effects of low and high temperatures. To ensure the normal operation of the instruments and components in the signal acquisition cabinet, a temperature control system is needed to regulate the internal temperature in real time.

[0003] Currently, wind power load test signal acquisition cabinets mainly adopt passive temperature control or single active temperature control systems (such as PID controllers combined with heating elements), and rigid structural connection designs. Such existing equipment has the following problems: Insufficient temperature control accuracy: Existing systems mostly rely on open-loop or simple closed-loop control, resulting in large temperature fluctuations (often exceeding ±2°C), affecting the stability of sensor data. Especially in environments with alternating high and low temperatures, traditional temperature control systems exhibit lag in response, easily leading to distortion of test signals.

[0004] The resonance problem is prominent: the data acquisition cabinet is easily affected by vibration during the operation of the wind turbine. The rigid fixing device lacks vibration reduction design, which leads to resonance with the natural frequency of the unit, causing structural fatigue, increased signal noise, and even equipment damage.

[0005] Low reliability and energy efficiency: Existing temperature control systems are inefficient (e.g., independent fans and heaters lack coordination), and electrical components are susceptible to electromagnetic interference or lightning strikes, resulting in a short lifespan. Utility Model Content

[0006] The purpose of this invention is to provide a constant-temperature signal acquisition cabinet for wind power load testing, which solves the problems of inaccurate temperature control, signal distortion caused by vibration resonance, and low system reliability in the existing technology.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A signal acquisition cabinet for constant-temperature wind power load testing includes a cabinet body with a door connected to the cabinet body via a hinged structure. Signal acquisition equipment is installed inside the cabinet. Cooling equipment is installed on the back of the cabinet body, and heating equipment is installed on the door. The cabinet body is fixedly connected to the wind turbine tower via an anti-resonance structure. The cooling equipment includes a cooling fan, and a ventilation grille that works with the cooling fan is installed on the bottom surface inside the cabinet body. Four anti-resonance structures are installed at the four corners of the back of the cabinet body. Each anti-resonance structure includes a pair of mounting plates, which are fixedly connected to the cabinet body and the wind turbine tower respectively. The pair of mounting plates are connected by a connecting rod, and a spring is sleeved on the outside of the connecting rod. Both ends of the connecting rod are connected to the pair of mounting plates via ball joints.

[0008] Preferably, the heating device includes heating pipes disposed on the outer side of the cabinet door, with heat-conducting rods sandwiched between the heating pipes, and the heat-conducting rods extending through the cabinet door into the interior of the cabinet.

[0009] Preferably, the signal acquisition device includes a data acquisition unit, a signal relay unit, and a signal receiving unit, with a temperature sensor installed below the data acquisition unit.

[0010] Preferably, an access port is provided at the bottom of the cabinet, through which the signal line passes to connect to the fish signal receiving unit inside the cabinet; the signal line is a shielded cable, and a grounding wire is provided on the signal receiving unit.

[0011] Preferably, a control console is installed inside the cabinet, and the control console is connected to the signal acquisition device and the temperature sensor respectively.

[0012] Preferably, a power supply is installed inside the cabinet, which is electrically connected to the signal acquisition equipment, cooling equipment, heating equipment, control console, and temperature sensor.

[0013] The beneficial effects of this utility model are: This invention features an automatic temperature control module that controls the temperature rise and fall of the cabinet interior through cooling and heating devices. It utilizes a composite temperature control element, including a temperature sensor and a PID controller integrated into the control panel, to achieve temperature control. Compared to the single temperature control element (such as a heater) commonly used in existing technologies, this invention achieves dynamic temperature adjustment within the cabinet through closed-loop linkage between the temperature sensor and the PID controller. This keeps temperature fluctuations within ±0.5℃ (compared to ±2℃ in existing technologies), avoiding signal acquisition errors caused by temperature drift. This effectively improves the accuracy of load test data, making it particularly suitable for the internal environment of wind turbine units where there are significant temperature differences between day and night and alternating high and low temperatures.

[0014] This invention features an anti-resonance structure that connects the cabinet to the wind turbine tower via a spring structure, forming a damping structure that alters the system's natural frequency, thereby avoiding the vibration source frequency band and achieving effective vibration reduction. Actual measurements show that this invention can reduce vibration amplitude by more than 30%, effectively reducing the impact of resonance on electronic components, extending equipment lifespan, suppressing signal noise, and improving the quality and accuracy of signal acquisition.

[0015] This invention employs electromagnetic shielding and lightning protection design. By using shielded cables, electromagnetic interference is reduced, and the anti-interference capability during signal transmission is improved. Grounding wires are used to avoid electronic component failures caused by lightning strikes. Tests have shown that the lightning strike failure rate can be reduced by more than 50%, making it particularly suitable for the high humidity and high salinity environment of offshore wind power equipment.

[0016] This invention features a modular architecture, integrating temperature control, vibration damping, and signal processing into a modular cabinet. The heating elements and cooling fans used for temperature regulation are located externally, effectively reducing the difficulty and cost of inspection and maintenance, and improving installation and maintenance efficiency. Placing the heating and cooling equipment externally also prevents interference with the precision electronic components inside the cabinet, ensuring the accuracy and stability of load test data. Simultaneously, the heat transfer rods effectively improve the heat distribution range of the heating equipment, preventing heat concentration near the heating equipment and its difficulty in dissipating to other parts of the cabinet, thus avoiding uneven heat distribution within the cabinet. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 This is a rear view of Embodiment 1 of the present utility model; Figure 3 This is a diagram showing the state of Embodiment 1 of this utility model when the cabinet door is open; Figure 4 This is a partially enlarged view of the anti-resonance structure of Embodiment 1 of this utility model; Figure 5 This is a diagram showing the state of the cabinet door when the cabinet door of Embodiment 2 of this utility model is open; Figure 6 This is a diagram showing the state of the cabinet door when the cabinet door of Embodiment 3 of this utility model is open; Figure 7 This is a cross-sectional view of the anti-resonance structure of Embodiment 4 of this utility model.

[0018] In the diagram: Cabinet 1; Cabinet door 2; Heating tube 3; Heat conduction rod 4; Anti-resonance structure 5; Cooling fan 6; Centralized acquisition unit 7; Temperature sensor 8; Signal relay unit 9; Control console 10; Power supply 11; Signal receiving unit 12; Signal line 13; Mounting plate 14; Spring 15; Connecting rod 16; Slide groove 17; Fixing plate 18. Detailed Implementation

[0019] Example 1 The following is a further explanation of the present invention in conjunction with specific embodiments, such as... Figure 1 As shown, this embodiment is a signal acquisition cabinet for a constant temperature wind power load test process, which mainly includes a cabinet body 1 and a cabinet door 2. The cabinet door 2 is connected to the cabinet body 1 through a hinge structure, and a handle and a door lock are provided on the side away from the hinge to open and lock the cabinet door 2.

[0020] A heating device is installed on the cabinet door 2, which includes heating tubes 3. A pair of heating tubes 3 are installed on the front of the cabinet door 2, and four heat-conducting rods 4 are sandwiched between the heating tubes 3. The heat-conducting rods 4 are filled with a heat-conducting filler, which can quickly conduct heat. When the heating tubes 3 operate and heat up, the heat-conducting rods 4 can quickly absorb the heat they emit. Figure 3 As shown, the heat-conducting rod 4 extends through the cabinet door 2 into the cabinet body 1. When the heating tube 3 is working and heating up, the heat-conducting rod 4 can transfer the heat it absorbs to the inside of the cabinet body 1, thereby heating the inside of the cabinet body 1. The shape and structure of the heat-conducting rod 4 inside the cabinet body 1 can be adapted to the specific arrangement of the components inside the cabinet body 1 to ensure that the heating of all parts inside the cabinet body 1 is uniform and to avoid uneven heating.

[0021] like Figure 2 As shown, a cooling device is installed on the back of the cabinet 1, specifically including a cooling fan 6; the cooling fan 6 is located in the middle of the back of the cabinet 1, and a ventilation grille is installed on the back of the cabinet 1 to cooperate with it, such as... Figure 3 As shown; the cooling fan 6 can exhaust the high-temperature air inside the cabinet 1 to the outside through the ventilation grille, thereby cooling the inside of the cabinet 1.

[0022] The cabinet 1 is equipped with signal acquisition devices, including a data acquisition unit 7 at the top, a signal relay unit 9 in the middle, and a signal receiving unit 12 at the bottom, which are responsible for receiving and processing data from external sensors. A temperature sensor 8 is located below the data acquisition unit 7 to monitor the air temperature at the top of the cabinet in real time. A control console 10 is located at the bottom of the cabinet, which contains a PID controller to monitor the air temperature at the bottom of the cabinet. By combining the monitoring data from the temperature sensor 8 and the control console 10, the system can respond to dynamic temperature changes more efficiently, thereby controlling the temperature range more accurately.

[0023] The signal receiving unit 12 is connected to other external devices via signal lines 13. An inlet is provided at the bottom of the cabinet 1 for the signal lines 13 to pass through the side panel of the cabinet 1, which also serves as a ventilation opening when the cabinet door 2 is closed. Correspondingly, a ventilation opening can also be provided on the top side panel of the cabinet 1 (not shown in the figure), thereby constructing a reasonable air duct and improving the cooling efficiency of the cooling fan 6. All signal lines 13 are shielded cables, which can improve the electromagnetic interference resistance of the signal lines 13. A grounding wire is also provided to connect to the earth to improve the lightning protection capability of the electronic components inside the signal acquisition cabinet. A power supply 11 is also provided inside the cabinet 1, which is connected to the heating equipment, cooling equipment, temperature sensor, control console, and signal acquisition equipment to provide power to the above devices.

[0024] like Figure 2 As shown, the back of cabinet 1 is equipped with an anti-resonance structure, with four anti-resonance structures evenly distributed at the four corners; as shown... Figure 4 As shown, the anti-resonance structure includes a pair of mounting plates 14, which are fixedly connected to the cabinet 1 and the wind turbine tower respectively, and can be fixed by welding, bolts or other fixing methods. The pair of mounting plates 14 are connected by a connecting rod 16, and both ends of the connecting rod 16 are connected to the mounting plates 14 through a ball joint structure, so that the pair of mounting plates 14 can make a small range of relative displacement. A spring 15 is sleeved on the outside of the connecting rod 16, and both ends of the spring 15 are fixedly connected to the inner side of the pair of mounting plates 14. When the two mounting plates 14 deviate from the coaxial state, the spring 15 will generate a corresponding force to drive the two mounting plates 14 back to the original coaxial state. Through the energy absorption of the spring 15 and the connection with a certain degree of flexibility, vibration can be effectively absorbed, the natural frequency of the system can be changed, and the impact of resonance on electronic components can be reduced. The mounting plates 14 can adopt a rubber vibration isolation pad structure to further absorb and isolate the resonance effect.

[0025] In practical use, this embodiment can simultaneously monitor the air temperature in different areas inside the cabinet 1 through the temperature sensor 8 and the control console 10, and control the temperature rise through two sets of heating tubes 3 respectively. When the detected temperature is lower than the preset temperature range, the power of the cooling fan 6 is reduced, and the corresponding heating tube 3 is activated to heat the inside of the cabinet 1. The heating power is gradually increased from low to high until the temperature reaches the preset temperature range, and then the power is gradually reduced until the temperature is within the preset temperature range and no longer shows a downward trend. When the temperature exceeds the preset temperature range, the cooling fan 6 is turned on to start active heat dissipation, and the power of the heating tube 3 is reduced. The power of the cooling fan 6 gradually increases from low to high until the temperature reaches the preset temperature range and no longer shows an upward trend. If the power of the heating element 3 decreases to 0 and the preset temperature range is not reached, the cooling fan 6 continues to run and further increases the heat dissipation power, which is in cooling mode. If the power of the cooling fan 6 decreases to 0 and the preset temperature range is not reached, the heating element 3 continues to run and further increases the heating power, which is in heating mode. Depending on the external environment, the signal acquisition cabinet of this embodiment can adaptively change the heating mode or the cooling mode, and combined with the cooperation of multiple temperature control elements, it can respond efficiently and control the temperature accurately.

[0026] Example 2 The difference between this embodiment and Embodiment 1 is that, Figure 5 As shown, the structure of the heat-conducting rod 4 on the inner side of the cabinet door 2 is different in this embodiment. A group of heat-conducting rods 4 that cooperate with the same heating tube 3 are connected as one unit, which increases the effective heat dissipation area and the heat conduction efficiency. At the same time, the volume of the heat-conducting rod 4 inside the cabinet 1 is increased, making the heating effect more uniform.

[0027] Example 3 The difference between this embodiment and Embodiment 1 is that, Figure 6 As shown, the structure of the heat-conducting rod 4 on the inner side of the cabinet 2 in this embodiment is different from that in embodiment 1. A group of heat-conducting rods 4 that cooperate with the same heating tube 3 are connected as one unit and have a quadrilateral structure. In this embodiment, the quadrilateral structure formed by the heat-conducting rods 4 inside the cabinet 1 can surround the various electronic components set inside the cabinet 1, so that the heating effect is more uniform, the heating efficiency is higher, and the phenomenon of uneven local heating is avoided.

[0028] Example 4 The difference between this embodiment and Embodiment 1 is that, Figure 7As shown, different anti-resonance structures 5 are used in this embodiment. In this embodiment, a groove 17 is provided in the mounting plate 14, and the spherical structures at both ends of the connecting rod 16 are embedded in the groove 17, which can slide back and forth to a certain extent in the groove 17. Fixing plates 18 are provided at both ends of the outer side of the pair of mounting plates 14. The fixing plates 18 are provided with through holes, through which bolts can be passed to fix them to the cabinet or wind turbine tower. This embodiment increases the mobility of the anti-resonance structure 5, so that it can further contract or extend slightly according to the vibration, and further enhance the vibration absorption capacity.

[0029] The above description is merely a further explanation of the present utility model in conjunction with specific embodiments. All descriptions made do not imply any limitation on the protection scope of the present utility model. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be determined by the protection scope of the claims.

Claims

1. A signal acquisition cabinet in a constant-temperature wind power load test process, comprising a cabinet body, a cabinet door is connected to the cabinet body through a hinge structure, characterized in that: The cabinet is equipped with signal acquisition equipment, a cooling device on the back of the cabinet, and a heating device on the cabinet door. The cabinet is fixedly connected to the wind turbine tower via an anti-resonance structure. The cooling device includes a cooling fan, and a ventilation grille that works with the cooling fan is installed on the bottom surface inside the cabinet. Four anti-resonance structures are installed at the four corners of the back of the cabinet. Each anti-resonance structure includes a pair of mounting plates, which are fixedly connected to the cabinet and the wind turbine tower respectively. The pair of mounting plates are connected by a connecting rod, and a spring is sleeved on the outside of the connecting rod. Both ends of the connecting rod are connected to the pair of mounting plates via ball joints.

2. The thermostated signal acquisition cabinet for wind power load testing procedures according to claim 1, characterized in that: The heating device includes heating tubes installed on the outer side of the cabinet door, with heat-conducting rods sandwiched between the heating tubes, and the heat-conducting rods extending through the cabinet door into the interior of the cabinet.

3. The thermostated signal acquisition cabinet for wind power load testing procedures according to claim 1, characterized in that: The signal acquisition device includes a data acquisition unit, a signal relay unit, and a signal receiving unit, with a temperature sensor installed below the data acquisition unit.

4. The thermostated signal acquisition cabinet in a wind power load test process according to claim 3, characterized in that: The bottom of the cabinet is provided with an access port, through which the signal line enters the cabinet and connects to the signal receiving unit; the signal line is a shielded cable, and the signal receiving unit is provided with a grounding wire.

5. The thermostated signal acquisition cabinet for wind power load testing procedures according to claim 3, characterized in that: The cabinet is equipped with a control console, which is connected to the signal acquisition device and the temperature sensor.

6. The thermostated signal acquisition cabinet in a wind power load test procedure according to claim 5, characterized in that: The cabinet is equipped with a power supply, which is electrically connected to the signal acquisition device, cooling device, heating device, control console, and temperature sensor.

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