Infrared thermal image IV tester all-in-one machine

Abstract

An infrared thermal image IV tester all-in-one machine comprises an outer shell, and the side face of the outer shell is provided with a battery piece negative electrode interface, a battery piece positive electrode interface, a solar module positive electrode interface, a solar module negative electrode interface, a display screen and an infrared lens. The standard battery piece is connected with the first current sensor, and the first current sensor is connected with the central processing unit through the first current signal processor; a solar assembly positive electrode interface is connected with a second current sensor through a positive electrode wiring circuit breaker. The second current sensor is connected with the central processor through a second current signal processor. A cathode interface of the solar module is connected with the charging and discharging control unit through a cathode wiring circuit breaker; the infrared lens is connected with the infrared photoreceptor, and the infrared photoreceptor is connected with the central processing unit through the signal processor. According to the utility model, thermal image monitoring and IV testing of the solar assembly can be carried out synchronously, and the testing efficiency is improved. And the temperature data can be directly applied to data calculation of an IV curve, and a thermocouple test assembly does not need to be additionally connected.

Description

Technical Field

[0001] This utility model relates to the field of solar energy product testing technology, specifically to an integrated infrared thermal imaging IV tester. Background Technology

[0002] With the increasing prevalence of solar power plants, the failure of some component units is inevitable during operation, affecting the overall efficiency of the plant. Infrared thermal imagers and IV testers are the most common instruments used for on-site inspection of solar power plants. Infrared thermal imagers test the surface heating of solar modules to identify hot spots. Localized hot spots can reduce operating efficiency and even cause fires. IV testers are used to test the power output of solar modules and analyze their degradation.

[0003] However, most current infrared thermal imagers and IV testers are independent devices, requiring separate carrying and alternating use, resulting in long testing cycles and inconvenience. Furthermore, IV test results are significantly affected by irradiance and temperature, necessitating external thermocouples to measure the temperature of the testing components, which is cumbersome, prone to thermocouple damage, and has a high failure rate. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an integrated infrared thermal imaging (IV) tester, overcoming these deficiencies with its rational design. It allows for simultaneous thermal imaging monitoring and IV testing of solar panels, improving testing efficiency. Furthermore, temperature data can be directly used for IV curve calculations without the need for additional thermocouple testing components.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An integrated infrared thermal imaging (IV) tester includes a housing. The sides of the housing are respectively provided with a negative terminal interface for a battery cell, a positive terminal interface for a battery cell, a positive terminal interface for a solar module, and a negative terminal interface for a solar module. A central processing unit, a first current sensor, a second current sensor, and an infrared photosensitive sensor are fixedly installed in the inner cavity of the housing. A rechargeable battery is fixedly installed at the bottom of the housing, and a display screen and an infrared lens are fixedly embedded on the surface of the housing.

[0007] The outer sides of the negative and positive interfaces of the battery cell are connected to the negative and positive terminals of the standard battery cell respectively via wires. The inner sides of the negative and positive interfaces of the battery cell are connected to the input terminal of the first current sensor via wires. The output terminal of the first current sensor is connected to the input terminal of the first current signal processor. The output terminal of the first current signal processor is connected to the central processing unit.

[0008] The outer sides of the positive and negative interfaces of the solar module are connected to the positive and negative terminals of the solar module respectively via wires. The inner side of the positive interface of the solar module is connected to the input terminal of the second current sensor via a positive terminal circuit breaker. The output terminal of the second current sensor is connected to the input terminal of the second current signal processor, and the output terminal of the second current signal processor is connected to the central processing unit. The inner side of the negative interface of the solar module is connected to the first input terminal of the charge / discharge control unit via a negative terminal circuit breaker. The second input terminal of the charge / discharge control unit is connected to the second current sensor. The control terminals of the charge / discharge control unit, the positive terminal circuit breaker, and the negative terminal circuit breaker are all connected to the signal output terminal of the central processing unit.

[0009] The infrared lens is connected to the infrared sensor via an optical fiber. The output of the infrared sensor is connected to the signal processor, and the output of the signal processor is connected to the central processing unit. The central processing unit is connected to the display screen via a data bus, and the rechargeable battery is connected to the central processing unit to supply the required power.

[0010] Preferably, the charging and discharging control unit includes a charging capacitor, a charging resistor, a discharging resistor, and a discharging circuit breaker. One end of the charging capacitor is connected to one end of the discharging resistor and a second current sensor, respectively. The other end of the discharging resistor is connected to one end of the discharging circuit breaker. The other end of the charging capacitor is connected to one end of the charging resistor. The other end of the charging resistor is connected to the other end of the negative terminal circuit breaker and the other end of the discharging circuit breaker, respectively. The control terminal of the discharging circuit breaker is connected to the output terminal of the central processing unit.

[0011] Preferably, a voltage signal processor is fixedly installed in the inner cavity of the outer casing. The input terminal of the voltage signal processor is connected to the positive and negative interfaces of the solar panel through positive and negative wires, respectively, and the output terminal of the voltage signal processor is connected to the central processing unit.

[0012] Preferably, the outer side of the outer casing is provided with a battery cell thermocouple interface. The outer side of the battery cell thermocouple interface is connected to the thermocouple of a standard battery cell via a wire. The inner side of the battery cell thermocouple interface is connected to the input terminal of a temperature signal processor via a wire. The output terminal of the temperature signal processor is connected to a central processing unit. The temperature signal processor is fixedly installed in the inner cavity of the outer casing.

[0013] Preferably, the display screen is a high-resolution touchscreen.

[0014] This invention provides an integrated infrared thermal imaging (IV) tester with the following advantages: it can perform thermal imaging monitoring of solar modules using an infrared sensor, and simultaneously measure outdoor weather irradiance using standard solar cells. Data from a first current signal processor, a second current signal processor, and a voltage signal processor are then directly applied to calculate the IV curve of the solar module, eliminating the need for additional thermocouple testing components. This simplifies the testing process and effectively improves measurement efficiency and accuracy. Furthermore, thermal imaging monitoring and IV testing of the solar module can be performed simultaneously, providing real-time feedback on performance changes, thereby further enhancing testing efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of the prior art will be briefly introduced below.

[0016] Figure 1 A schematic diagram of the structure of this utility model;

[0017] Figure 2 The circuit diagram of the inner cavity of the outer shell in this utility model;

[0018] Figure 3 Circuit connection diagram of the charging and discharging control unit in this utility model;

[0019] Explanation of the labels in the diagram:

[0020] 1. Housing; 2. Negative terminal interface of solar cell; 3. Positive terminal interface of solar cell; 4. Thermocouple interface of solar cell; 5. Positive terminal interface of solar module; 6. Negative terminal interface of solar module; 7. Central processing unit; 8. First current sensor; 9. Second current sensor; 10. Infrared sensor; 11. Rechargeable battery; 12. Display screen; 13. Standard solar cell; 14. First current signal processor; 15. Temperature signal processor; 16. Solar module; 17. Positive terminal circuit breaker; 18. Second current signal processor; 19. Negative terminal circuit breaker; 20. Signal processor; 21. Charging capacitor; 22. Charging resistor; 23. Discharging resistor; 24. Discharging circuit breaker; 25. Voltage signal processor; 26. Positive connection; 27. Negative connection; 28. Infrared lens. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0022] Example 1, as Figure 1-3As shown, an integrated infrared thermal imaging (IV) tester includes a housing 1. The sides of the housing 1 are respectively provided with a negative terminal interface 2 for a battery cell, a positive terminal interface 3 for a battery cell, a positive terminal interface 5 for a solar module, and a negative terminal interface 6 for a solar module. A central processing unit 7, a first current sensor 8, a second current sensor 9, and an infrared sensor 10 are fixedly installed inside the housing 1. A rechargeable battery 11 is fixedly installed at the bottom of the housing 1. A display screen 12 and an infrared lens 28 are fixedly embedded on the surface of the housing 1.

[0023] The outer sides of the negative terminal interface 2 and the positive terminal interface 3 of the battery cell are connected to the negative and positive terminals of the standard battery cell 13 respectively via wires. The inner sides of the negative terminal interface 2 and the positive terminal interface 3 of the battery cell are connected to the input terminal of the first current sensor 8 via wires. The output terminal of the first current sensor 8 is connected to the input terminal of the first current signal processor 14. The output terminal of the first current signal processor 14 is connected to the central processing unit 7.

[0024] The outer sides of the positive terminal 5 and negative terminal 6 of the solar module are connected to the positive and negative terminals of the solar module 16 respectively via wires. The inner side of the positive terminal 5 is connected to the input terminal of the second current sensor 9 via the positive terminal circuit breaker 17. The output terminal of the second current sensor 9 is connected to the input terminal of the second current signal processor 18. The output terminal of the second current signal processor 18 is connected to the central processing unit 7. The inner side of the negative terminal 6 is connected to the first input terminal of the charge / discharge control unit via the negative terminal circuit breaker 19. The second input terminal of the charge / discharge control unit is connected to the second current sensor 9. The control terminals of the charge / discharge control unit, the positive terminal circuit breaker 17, and the negative terminal circuit breaker 19 are all connected to the signal output terminal of the central processing unit 7.

[0025] The infrared lens 28 is connected to the infrared sensor 10 via an optical fiber. The output of the infrared sensor 10 is connected to the signal processor 20. The output of the signal processor 20 is connected to the central processing unit 7. The central processing unit 7 is connected to the display screen 12 via a data bus. The rechargeable battery 11 is connected to the central processing unit 7 to supply the required power.

[0026] In this embodiment, the charge / discharge control unit includes a charging capacitor 21, a charging resistor 22, a discharging resistor 23, and a discharging circuit breaker 24. One end of the charging capacitor 21 is connected to one end of the discharging resistor 23 and the second current sensor 9. The other end of the discharging resistor 23 is connected to one end of the discharging circuit breaker 24. The other end of the charging capacitor 21 is connected to one end of the charging resistor 22. The other end of the charging resistor 22 is connected to the negative terminal circuit breaker 19 and the other end of the discharging circuit breaker 24. The control terminal of the discharging circuit breaker 24 is connected to the output terminal of the central processing unit 7.

[0027] A voltage signal processor 25 is fixedly installed inside the outer casing 1. The input terminals of the voltage signal processor 25 are connected to the positive and negative interfaces of the solar module through the positive terminal connection 26 and the negative terminal connection 27, respectively. The output terminal of the voltage signal processor 25 is connected to the central processing unit 7.

[0028] Working principle:

[0029] In use, the image of the solar panel 16 is first captured by the infrared lens 28 and then transferred to the infrared photosensitive sensor 10. The heat distribution data sensed by the infrared photosensitive sensor 10 is then transmitted to the signal processor 20. After data processing by the signal processor 20, the data is transmitted to the central processing unit 7. The central processing unit 7 identifies different signals as temperature data, converts them into color signals, and then transmits them to the display screen 12 via a data bus to display the thermal image of the solar panel 16 in real time. In this embodiment, the infrared lens 28 contains multiple photosensitive units, allowing the average temperature of the surface of the solar panel 16 to be obtained by averaging the temperatures of all photosensitive units in the infrared photosensitive sensor.

[0030] The standard solar cell 13 is used to test outdoor irradiance. The current in the standard solar cell 13 changes with the irradiance. Since the positive and negative terminals of the standard solar cell 13 are connected to the input terminal of the first current sensor 8 via wires, the current change in the standard solar cell 13 can be measured by the first current sensor 8. The first current sensor 8 then processes the current signal through the first current signal processor 14 before inputting it into the central processing unit 7. The central processing unit 7 combines the current data from the standard solar cell 13 to derive the accurate value of the outdoor weather irradiance.

[0031] The central processing unit 7 outputs control signals to the positive terminal circuit breaker 17, the negative terminal circuit breaker 19, and the discharge circuit breaker 24 to control the positive terminal circuit breaker 17 and the negative terminal circuit breaker 19 to close and the discharge circuit breaker 24 to open; so that the positive terminal of the solar module 16 is connected to the second current signal processor 18 through the second current sensor 9. At this time, the central processing unit 7 collects data from the first current signal processor 14, the second current signal processor 18, and the voltage signal processor 25 respectively.

[0032] The positive and negative terminals of the solar panel 16 are connected to the charge / discharge control unit, respectively. This allows the solar panel 16 to charge the charging capacitor 21 within the control unit. During charging, the resistance in the circuit transitions from 0 to infinity. The second current signal processor 18 and voltage signal processor 25 extract the current and voltage data from this process and transmit them to the central processing unit 7. The central processing unit 7 then combines the temperature data sensed by the infrared sensor 10 and the irradiance data of the standard solar cell 13. Using the voltage-current-temperature coefficient and irradiance influence factor of the solar panel 16, it converts the data into standard test conditions (1000W / m² and 25℃), which is the IV curve of the solar panel 16. The central processing unit 7 transmits this IV curve data to the display screen 12 via a data bus for real-time display. Furthermore, the central processing unit 7 obtains the maximum value of the current-voltage product during this process, which is the maximum power value. By comparing the maximum power value with the factory parameters, the degradation of the solar panel 16 can be assessed. By combining the infrared thermal image data from the infrared sensor 10, a relatively comprehensive analysis can be conducted to carry out the operation and maintenance of the solar power plant.

[0033] This invention enables both thermal imaging monitoring of the solar module 16 via the infrared sensor 10 and precise measurement of outdoor weather irradiance via the standard solar cell 13. Data from the first current signal processor 14, the second current signal processor 18, and the voltage signal processor 25 are then directly applied to the calculation of the IV curve of the solar module 16, eliminating the need for additional thermocouple testing components. This simplifies the testing process and effectively improves measurement efficiency and accuracy. Furthermore, thermal imaging monitoring and IV curve calculation of the solar module 16 can be performed simultaneously, providing real-time feedback on module performance changes and further enhancing testing efficiency. Through this method, maintenance personnel can monitor the operating status of the solar module in real time, promptly identify and resolve potential problems, and ensure the efficient and stable operation of the power station.

[0034] In embodiment two, as a further preferred embodiment one, a battery cell thermocouple interface 4 is provided on the side of the outer casing 1. The outer side of the battery cell thermocouple interface 4 is connected to the thermocouple of the standard battery cell 13 through a wire, and the inner side of the battery cell thermocouple interface 4 is connected to the input terminal of the temperature signal processor 15 through a wire. The output terminal of the temperature signal processor 15 is connected to the central processing unit 7. The temperature signal processor 15 is fixedly installed in the inner cavity of the outer casing 1.

[0035] Therefore, the temperature of the standard solar cell 13 can be connected to the temperature signal processor 15 via the solar cell thermocouple interface 4. The temperature signal processor 15 can then monitor the temperature of the standard solar cell 13 in real time and transmit the temperature data to the central processing unit 7. The central processing unit 7 can then comprehensively analyze the temperature data to increase the calibration coefficient, thereby obtaining a more accurate value for outdoor weather irradiance. This further improves the performance evaluation accuracy of the solar module 16.

[0036] In Example 3, as a further preferred embodiment of Example 1, the display screen 12 adopts a high-resolution touchscreen. Therefore, a high-resolution touchscreen can enable more intuitive operation and data display, facilitating maintenance personnel to quickly retrieve key information and improve decision-making efficiency.

[0037] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An integrated infrared thermal imaging IV testing instrument, characterized in that: The device includes an outer casing (1), on which the sides are respectively provided a negative terminal interface (2) for the battery cells, a positive terminal interface (3) for the battery cells, a positive terminal interface (5) for the solar module, and a negative terminal interface (6) for the solar module. The inner cavity of the outer casing (1) is fixedly installed with a central processing unit (7), a first current sensor (8), a second current sensor (9), and an infrared sensor (10). The bottom of the outer casing (1) is fixedly installed with a rechargeable battery (11), and the surface of the outer casing (1) is fixedly embedded with a display screen (12) and an infrared lens (28). The outer sides of the negative terminal interface (2) and positive terminal interface (3) of the battery cell are connected to the negative and positive terminals of the standard battery cell (13) respectively via wires. The inner sides of the negative terminal interface (2) and positive terminal interface (3) of the battery cell are connected to the input terminal of the first current sensor (8) via wires. The output terminal of the first current sensor (8) is connected to the input terminal of the first current signal processor (14). The output terminal of the first current signal processor (14) is connected to the central processing unit (7). The outer sides of the positive terminal interface (5) and negative terminal interface (6) of the solar module are connected to the positive and negative terminals of the solar module (16) respectively via wires. The inner side of the positive terminal interface (5) of the solar module is connected to the input terminal of the second current sensor (9) via a positive terminal circuit breaker (17). The output terminal of the second current sensor (9) is connected to the input terminal of the second current signal processor (18). The output terminal of the second current signal processor (18) is connected to the central processing unit (7). The inner side of the negative terminal interface (6) of the solar module is connected to the first input terminal of the charge and discharge control unit via a negative terminal circuit breaker (19). The second input terminal of the charge and discharge control unit is connected to the second current sensor (9). The control terminal of the charge and discharge control unit, the control terminal of the positive terminal circuit breaker (17), and the control terminal of the negative terminal circuit breaker (19) are all connected to the signal output terminal of the central processing unit (7). The infrared lens (28) is connected to the infrared sensor (10) via an optical fiber. The output of the infrared sensor (10) is connected to the signal processor (20). The output of the signal processor (20) is connected to the central processing unit (7). The central processing unit (7) is connected to the display screen (12) via a data bus. The rechargeable battery (11) is connected to the central processing unit (7) to supply the required electrical energy.

2. The infrared thermal imaging IV testing instrument integrated machine according to claim 1, characterized in that: The charging and discharging control unit includes a charging capacitor (21), a charging resistor (22), a discharging resistor (23), and a discharging circuit breaker (24). One end of the charging capacitor (21) is connected to one end of the discharging resistor (23) and a second current sensor (9). The other end of the discharging resistor (23) is connected to one end of the discharging circuit breaker (24). The other end of the charging capacitor (21) is connected to one end of the charging resistor (22). The other end of the charging resistor (22) is connected to the other end of the negative terminal circuit breaker (19) and the other end of the discharging circuit breaker (24). The control terminal of the discharging circuit breaker (24) is connected to the output terminal of the central processing unit (7).

3. The integrated infrared thermal imaging IV testing instrument according to claim 1, characterized in that: A voltage signal processor (25) is fixedly installed inside the outer shell (1). The input terminals of the voltage signal processor (25) are connected to the positive and negative interfaces of the solar module through the positive terminal connection (26) and the negative terminal connection (27), respectively. The output terminal of the voltage signal processor (25) is connected to the central processing unit (7).

4. The integrated infrared thermal imaging IV testing instrument according to claim 1, characterized in that: The outer shell (1) is provided with a battery cell thermocouple interface (4) on its side. The outer side of the battery cell thermocouple interface (4) is connected to the thermocouple of the standard battery cell (13) through a wire. The inner side of the battery cell thermocouple interface (4) is connected to the input end of the temperature signal processor (15) through a wire. The output end of the temperature signal processor (15) is connected to the central processing unit (7). The temperature signal processor (15) is fixedly installed in the inner cavity of the outer shell (1).

5. The integrated infrared thermal imaging IV testing instrument according to claim 1, characterized in that: The display screen (12) is a high-resolution touch screen.

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