Monitoring equipment and photovoltaic monitoring system

Abstract

The utility model provides monitoring equipment and a photovoltaic monitoring system. The monitoring equipment comprises a circuit board, a master control module and a USB interface, wherein the master control module and the USB interface are arranged on the circuit board; one end of the USB interface is connected with the main control module, the other end of the USB interface is used for being inserted into an inverter, and the main control module is used for obtaining monitoring data of the inverter; the master control module comprises a processor, a storage module and a wireless communication module, wherein the storage module and the wireless communication module are connected with the processor. The storage module is used for storing monitoring data of the inverter; and the wireless communication module is used for sending the monitoring data to external equipment. The monitoring equipment can acquire and temporarily store the monitoring data of the inverter in real time through the USB interface, and transmit the monitoring data to external equipment, so that the stable transmission of the monitoring data of the inverter can be ensured while equipment wiring is reduced and the application range of the monitoring equipment is expanded, and the requirements of a user on real-time and accurate acquisition of the data of the inverter are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to monitoring equipment technical field especially relates to a monitoring equipment and photovoltaic monitoring system. BACKGROUND

[0002] At present, with the rapid development of renewable energy, photovoltaic monitoring system as the key tool to ensure the efficient operation of photovoltaic power station, its importance is increasingly prominent. Traditionally, photovoltaic monitoring system mainly through serial ports or RS-485 wired communication mode data transmission, cost-effective, but wired communication mode due to wiring complex, will limit the application range of photovoltaic monitoring system, especially in remote or difficult to wiring place.

[0003] In order to eliminate the communication drawbacks of traditional wired communication mode, wireless communication is also introduced in some existing photovoltaic monitoring systems, for example, WIFI or 4G network card is used for wireless communication, so that data transmission is more flexible and efficient, but in some complex environment, the quality of wireless communication may be affected by interference, resulting in unstable data transmission, which cannot meet the user's demand for real-time and accurate acquisition of inverter data. SUMMARY

[0004] The utility model provides a kind of monitoring equipment and photovoltaic monitoring system to solve the problem of unstable data transmission in existing photovoltaic monitoring system.

[0005] The utility model embodiment provides a kind of monitoring equipment, including circuit board and the main control module and USB interface of being set on the circuit board;

[0006] One end of the USB interface is connected with the main control module, and the other end of the USB interface is used for plugging on the inverter, and the main control module is used to obtain the monitoring data of the inverter through the USB interface;

[0007] The main control module includes a processor and a storage module and a wireless communication module connected with the processor;

[0008] The storage module is connected with the USB interface, and is used to store the monitoring data of the inverter;

[0009] The wireless communication module is used for communication connection with external equipment, and sends the monitoring data to external equipment.

[0010] Preferably, the wireless communication module includes WIFI unit and / or Bluetooth unit;

[0011] The WIFI unit is connected with the storage module and the processor, and is used for communication connection with external equipment;

[0012] And / or, the Bluetooth unit is connected with the storage module and the processor, and is used for communicating with external equipment.

[0013] Preferably, a key module is further arranged on the circuit board, and the key module is connected with the main control module, and is used for switching the wireless communication module to be in any one mode of opening, closing and restoring factory settings.

[0014] Preferably, an indicator light module is further arranged on the circuit board; the indicator light module comprises an LED module, a control tube, an upper pull resistor and a voltage stabilizing capacitor;

[0015] The power supply end of the LED module is connected with the first power supply end, the control end of the LED module is connected with the processor through the control tube, and is used for working according to the processing signal output by the processor, so as to indicate the working state of the monitoring equipment;

[0016] The first end of the upper pull resistor is connected at the connection joint between the LED module and the control tube, and the second end of the upper pull resistor is used for connecting the first power supply end;

[0017] The first end of the voltage stabilizing capacitor is connected with the connection joint between the first power supply end and the LED module, and the second end of the voltage stabilizing capacitor is grounded.

[0018] Preferably, a power supply module is further arranged on the circuit board, and the power supply module is connected with the main control module, and is used for providing the main control module with electric energy.

[0019] Preferably, the monitoring equipment further comprises a shell and a shell cover;

[0020] The shell cover is mounted on the shell, and the two cooperate to form a mounting space;

[0021] The shell cover is provided with a mounting hole, the circuit board is assembled in the mounting space, and one end of the USB interface passes through the mounting hole and is used for being plugged on an inverter.

[0022] Preferably, the monitoring equipment further comprises a clamping structure arranged on the shell and the shell cover;

[0023] The clamping structure comprises a clamping protrusion and a clamping groove; one of the clamping protrusion and the clamping groove is arranged on the shell, and the other is arranged on the shell cover; and the clamping protrusion is used for clamping with the clamping groove.

[0024] Preferably, the monitoring equipment further comprises a foolproof structure arranged on the shell and the shell cover;

[0025] The foolproof structure comprises two limiting components with different sizes, and each limiting component comprises a limiting protrusion and a limiting hole.

[0026] One of the limiting protrusion and the limiting hole is arranged on the shell, and the other is arranged on the shell cover, and the limiting protrusion is used for clamping in the limiting hole.

[0027] Preferably, the shell cover is provided with a first plug-in part in the first direction;

[0028] The first plug-in part is arranged at the outer edge of the mounting hole;

[0029] Two opposite sides of the first plug-in part are different in size, which is used for limiting and preventing mistake in assembly of two sides of the USB interface on the circuit board.

[0030] The shell is provided with a second plug-in part in the first direction, which is used for limiting one end of the circuit board away from the USB interface.

[0031] Preferably, the shell cover is provided with a fixing structure away from the circuit board, and the fixing structure is arranged at the periphery of the mounting hole, and the fixing structure is used for fixing the USB interface on the inverter.

[0032] The utility model embodiment further provides a photovoltaic monitoring system, including inverter and above any one of the monitoring device;

[0033] The monitoring device is installed on the inverter and communicates wirelessly with external equipment;

[0034] The inverter is used for being connected with photovoltaic equipment, load and power grid;

[0035] The inverter is used for inverting the electric energy output by the photovoltaic equipment and transmitting to the load and / or the power grid;Or, the inverter is used for inverting the electric energy output by the power grid and transmitting to the load.

[0036] The monitoring device and the photovoltaic monitoring system provided by the utility model embodiment can be connected with the inverter through the USB interface, and the monitoring data of the inverter can be acquired and temporarily stored in real time through the USB interface, and the monitoring data can be transmitted to the external equipment through the wireless communication module, so that the device wiring can be reduced, the application range of the monitoring device can be expanded, the stable transmission of the monitoring data of the inverter can be ensured, and the real-time and accurate acquisition of the inverter data of the user can be met. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0038] Figure 1 is a block diagram structure schematic view of the monitoring device in an embodiment of the present application;

[0039] Figure 2 is a work flow chart of the monitoring device in an embodiment of the present application;

[0040] Figure 3 is a circuit structure schematic view of the monitoring device in an embodiment of the present application;

[0041] Figure 4 is a structure schematic view of the monitoring device in an embodiment of the present application;

[0042] Figure 5 is another structure schematic view of the monitoring device in an embodiment of the present application;

[0043] Figure 6 is another structure schematic view of the monitoring device in an embodiment of the present application;

[0044] Figure 7 is a schematic view of the photovoltaic monitoring system in an embodiment of the present application.

[0045] Wherein, 1, circuit board; 2, main control module; 21, processor; 22, storage module; 23, wireless communication module; 231, WIFI unit; 232, Bluetooth unit; 3, USB interface; 4, key module; 5, indicator light module; 6, power module; 7, shell; 8, shell cover; 81, mounting hole; 9, clamping structure; 91, clamping protrusion; 92, clamping groove; 10, foolproof structure; 101, limiting protrusion; 102, limiting hole; 11, first plug connector; 12, second plug connector; 13, fixing structure; 14, inverter. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clearly understood, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0047] In the description of the present application, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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 particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0048] In the description of the present application, it is to be understood that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0049] The utility model embodiment provides a kind of monitoring equipment, such as Figure 1 And Figure 6 As shown in the figure, it includes circuit board 1 and is set on circuit board 1 main control module 2 and USB interface 3;USB interface 3 one end is connected with main control module 2, the other end of USB interface 3 is used for being inserted on inverter 14, main control module 2 is used for obtaining the monitoring data of inverter 14 by USB interface 3;Main control module 2 includes processor 21 and the storage module 22 and wireless communication module 23 connected with processor 21;Storage module 22 is connected with USB interface 3, and is used to store the monitoring data of inverter 14;Wireless communication module 23 is used to be connected with external device communication, and monitoring data is sent to external device.

[0050] As an example, the monitoring device includes a circuit board 1, a main control module 2, and a USB interface 3 mounted on the circuit board 1. One end of the USB interface 3 is connected to the main control module 2, and the other end is used to connect to the inverter 14. The main control module 2 can communicate with the inverter 14 through the USB interface 3 to directly obtain the monitoring data of the inverter 14 in real time, which can reduce the wiring of the monitoring device and expand the application scope of the monitoring device. Specifically, the main control module 2 includes a processor 21, a storage module 22 connected to the processor 21, and a wireless communication module 23. The storage module 22 is connected to the USB interface 3 and is used to transmit data with the inverter 14 through the USB interface 3, obtain the monitoring data of the inverter 14 in real time, and store or cache the obtained monitoring data of the inverter 14. The wireless communication module 23 is connected to the storage module 22 and the processor 21 and is used to communicate with external devices under the control of the processor 21 and send the monitoring data to external devices, such as servers. Furthermore, when the wireless communication module 23 experiences poor communication quality due to external interference or other reasons, or even loses connection with external devices, the storage module 22 can still maintain data transmission with the inverter 14 and store monitoring data. Once the wireless communication module 23 re-establishes communication with external devices, the monitoring data acquired during the disconnection can be uploaded to external devices, preventing data transmission instability caused by poor wireless communication quality.

[0051] In this example, the monitoring device can be connected to the inverter 14 via USB. The monitoring data of the inverter 14 can be acquired and temporarily stored in real time through the USB interface 3. The monitoring data can be transmitted to external devices through the wireless communication module 23. This can reduce the wiring of the device and expand the application scope of the monitoring device while ensuring the stable transmission of the monitoring data of the inverter 14, thus meeting the user's need for real-time and accurate acquisition of the inverter 14 data.

[0052] In one embodiment, such as Figure 1 As shown, the wireless communication module 23 includes a WIFI unit 231 and / or a Bluetooth unit 231; the WIFI unit 231 is connected to the storage module 22 and the processor 21 for communication with external devices; and / or, the Bluetooth unit 231 is connected to the storage module 22 and the processor 21 for communication with external devices.

[0053] As an example, the wireless communication module 23 includes a WIFI unit 231 and / or a Bluetooth unit 231. The WIFI unit 231 is connected to the storage module 22 and the processor 21, and is used for communication connection with an external device; and / or, the Bluetooth unit 231 is connected to the storage module 22 and the processor 21, and is used for communication connection with an external device. When the wireless communication module 23 contains the Bluetooth unit 231, low-power Bluetooth technology can be used, specifically, when the Bluetooth unit 231 is disconnected from an external device, such as a terminal, such as a mobile phone, for 10 minutes, the Bluetooth unit 231 is turned off under the control of the processor 21 to reduce the power consumption of the device. Alternatively, when the wireless communication module 23 contains both the Bluetooth unit 231 and the WIFI unit 231, as shown in Figure 2 , the Bluetooth unit 231 can first be connected to an external device through Bluetooth, and then the WIFI network configuration is performed with the external device on the APP side, so as to realize networking in the 2.4 GHz frequency band. After networking, the Bluetooth unit 231 and the WIFI unit 231 can respectively perform data synchronization through the network-connected cloud server side and the Bluetooth-connected APP side, and further, when data is normally received through the WIFI unit 231 for 30 minutes, the processor 21 can control the Bluetooth unit 231 to be turned off to reduce the power consumption of the device.

[0054] In an embodiment, as shown in Figure 1 , the circuit board 1 further comprises a key module 4 connected to the main control module 2, which is used to switch the monitoring circuit to any one of the modes of being turned on, turned off, and restored to factory settings.

[0055] As an example, the substrate further comprises a key module 4 connected to the processor 21. The key module 4 includes a key and a contact circuit, and the contact circuit is connected to the processor 21. When the key in the key module 4 is pressed for a short time, the key can be temporarily in contact with the contact circuit and output a first signal to the processor 21, so that the processor 21 controls to turn on or turn off the wireless communication module 23 after receiving the first signal. When the key in the key module 4 is pressed for a long time, and the long-press time exceeds 3 seconds, the contact circuit can output a second signal to the processor 21, so that the processor 21 controls to initialize the wireless communication module 23 or restore the factory settings.

[0056] In an embodiment, as shown in Figure 3As shown, the circuit board 1 is further provided with an indicator light module 5; the indicator light module 5 comprises an LED module U1, a control tube Q1, a pull-up resistor R1 and a voltage stabilizing capacitor C1; a power supply end of the LED module U1 is connected with a first power supply end 5V, a control end of the LED module U1 is connected with the processor 21 through the control tube Q1, and is used for working according to a processing signal output by the processor 21 to indicate a working state of the monitoring device; a first end of the pull-up resistor R1 is connected with a connection node between the LED module U1 and the control tube Q1, a second end of the pull-up resistor R1 is used for connecting the first power supply end 5V; a first end of the voltage stabilizing capacitor C1 is connected with a connection node between the first power supply end 5V and the LED module U1, and a second end of the voltage stabilizing capacitor C1 is grounded.

[0057] As an example, the circuit board 1 is further provided with an indicator light module 5. The indicator light module 5 comprises an LED module U1, a control tube Q1, a pull-up resistor R1 and a voltage stabilizing capacitor C1; the power supply end of the LED module U1 is connected with the first power supply end 5V, the control end of the LED module U1 is connected with the processor 21 through the control tube Q1, and is used for working according to the processing signal output by the processor 21, so as to indicate the working state of the monitoring device, for example, when the device is in an initialization state, the LED module U1 works in a white constant state under the control of the processor 21; when the USB interface 3 of the device communicates abnormally with the inverter 14, the LED module U1 works in a red constant state under the control of the processor 21; when the WIFI unit 231 or the Bluetooth unit 231 is connected abnormally, the LED module U1 works in a red flashing state under the control of the processor 21; when the WIFI unit 231 and the Bluetooth unit 231 are connected and communicate normally, the LED module U1 works in a green constant state under the control of the processor 21, and the like. The control tube Q1 can be an NPN type triode, the first end of the control tube Q1 is the emitter of the NPN type triode, the second end of the control tube Q1 is the collector of the NPN type triode, and the third end of the control tube Q1 is the base of the NPN type triode. The first end of the control tube Q1 is connected with the processor 21, the second end of the control tube Q1 is connected with the control end of the LED module U1, that is, the DIN pin, and the third end of the control tube Q1 is connected with the second power supply end 3.3V; the second power supply end 3.3V is used for providing an opening voltage, so that the control tube Q1 is in a constant-on state, when the control tube Q1 is in a conduction state, the processor 21 outputs a control level, which will cause the control end of the LED module U1 to generate a corresponding level change, so that the LED module U1 displays the working state of the device according to a series of control levels output by the processor 21. The first end of the pull-up resistor R1 is connected at a connection node between the LED module U1 and the control tube Q1, the second end of the pull-up resistor R1 is used for connecting the first power supply end 5V, so as to play a pull-up role, so that when the processor 21 has no signal output, the control end of the LED module U1 is not in a suspended state, and there is still a 5V voltage, so as to prevent electromagnetic interference. The first end of the voltage stabilizing capacitor C1 is connected with the connection node between the first power supply end 5V and the LED module U1, and the second end of the voltage stabilizing capacitor C1 is grounded. The voltage stabilizing capacitor C1 is used for filtering and stabilizing voltage, so as to ensure that the indicator light module 5 works normally.

[0058] In an embodiment, as shown in Figure 1 The circuit board 1 is further provided with a power supply module 6, which is connected with the main control module 2 and is used for providing power for the main control module 2.

[0059] As an example, the circuit board 1 is further provided with a power module 6, which is connected with the main control module 2 and used to provide power for the main control module 2. By arranging the power module 6, the stability of the power supply of the circuit board 1 can be improved and the noise can be reduced, so that the monitoring device can operate more reliably.

[0060] In an embodiment, as shown in Figure 4 The monitoring device further comprises a housing 7 and a cover 8. The cover 8 is mounted on the housing 7, and the two cooperate to form a mounting space. The cover 8 is provided with a mounting hole 81, and the circuit board 1 is assembled in the mounting space, and one end of the USB interface 3 passes through the mounting hole 81 for plugging on the inverter 14.

[0061] As an example, the monitoring device further comprises a housing 7 and a cover 8. The housing 7 can be a cylindrical shell with an opening at one end, and the cover 8 covers the opening to form a mounting space with the housing 7. The circuit board 1 can be assembled in the mounting space along a first direction (i.e. the axial direction of the housing 7). The USB interface 3 arranged on the circuit board 1 can be a USB male head, and the cover 8 can be provided with a mounting hole 81 to accommodate the USB male head arranged on the circuit board 1 to pass through and plug with the USB female head on the inverter 14. In this example, the monitoring device can be USB-plugged with the inverter 14, and can acquire and temporarily store the monitoring data of the inverter 14 in real time through the USB interface 3, and transmit the monitoring data to an external device through the wireless communication module 23. This can reduce the wiring of the device, expand the application range of the monitoring system, ensure the stable transmission of the monitoring data of the inverter 14, and meet the user's demand for real-time and accurate acquisition of the data of the inverter 14.

[0062] In an embodiment, as shown in Figure 4 The monitoring device further comprises a clamping structure 9 arranged on the housing 7 and the cover 8. The clamping structure 9 can comprise at least one set of oppositely arranged clamping protrusions 91 and clamping grooves 92. One of the clamping protrusions 91 and the clamping grooves 92 is arranged on the housing 7, and the other is arranged on the cover 8. The clamping protrusions 91 are used to clamp with the clamping grooves 92.

[0063] As an example, the monitoring device further comprises a clamping structure 9 arranged on the housing 7 and the cover 8. The clamping structure 9 can comprise at least one set of oppositely arranged clamping protrusions 91 and clamping grooves 92. One of the clamping protrusions 91 and the clamping grooves 92 is arranged on the housing 7, and the other is arranged on the cover 8. Specifically, as shown in Figure 5As shown, the clamping protrusion 91 can be a spring structure extending from one side of the shell cover 8, and the clamping groove 92 is formed on the inner wall of the shell 7. When the shell cover 8 is closed on the shell 7 along the first direction, the spring structure moves along the first direction to the inside of the shell 7 and is compressed by the inner wall of the shell 7 to produce a certain deformation. When the free end of the spring structure moves into the clamping groove 92 formed in the shell 7, the spring structure is no longer compressed by the inner wall of the shell 7 and will rebound to form a clamping structure 9 with the clamping groove 92 to fix the shell cover 8 on the shell 7.

[0064] In an embodiment, as shown, the monitoring device further comprises a foolproof structure 10 arranged on the shell 7 and the shell cover 8. The foolproof structure 10 comprises two limiting components of different sizes. Each limiting component comprises a limiting protrusion 101 and a limiting hole 102. One of the limiting protrusion 101 and the limiting hole 102 is arranged on the shell 7, and the other is arranged on the shell cover 8. The limiting protrusion 101 is used for clamping in the limiting hole 102. Figure 6

[0065] As an example, the monitoring device further comprises a foolproof structure 10 arranged on the shell 7 and the shell cover 8. The foolproof structure 10 comprises two limiting components of different sizes. Each limiting component comprises a limiting protrusion 101 and a limiting hole 102. In each limiting component, the limiting protrusion 101 and the limiting hole 102 are arranged opposite to each other. One of the limiting protrusion 101 and the limiting hole 102 is arranged on the shell 7, and the other is arranged on the shell cover 8. The limiting protrusion 101 is used for clamping in the limiting hole 102. Specifically, as shown, two limiting protrusions 101 are arranged on the shell cover 8, and two limiting holes 102 are arranged on the shell 7. The two limiting protrusions 101 of different sizes are arranged on two sides of the shell cover 8. Two limiting holes 102 of different sizes and matching the sizes of the corresponding limiting protrusions 101 are arranged at the corresponding positions of the shell 7. The two limiting protrusions 101 of different sizes are clamped in the corresponding limiting holes 102, respectively, to distinguish the closing direction and play a foolproof role. Figure 6

[0066] In an embodiment, as shown, the shell cover 8 is provided with a first plug-in part 11 along the first direction. The first plug-in part 11 is arranged at the outer edge of the mounting hole 81. The two opposite sides of the first plug-in part 11 are of different sizes, which are used for limiting and assembling the foolproof of the two sides of the USB interface 3 on the circuit board 1. The shell 7 is provided with a second plug-in part 12 along the first direction, which is used for limiting the end of the circuit board 1 away from the USB interface 3. Figure 6

[0067] ​​​As an example, the inner side wall of the shell cover 8 is provided with a first plug-in part 11 in the first direction, which can be a protrusion extending from the outer edge of the mounting hole 81 in the first direction, used for accommodating and clamping the USB interface 3, and the two opposite sides of the first plug-in part 11 are used for abutting the two sides of the USB interface 3 on the circuit board 1 to clamp and limit the USB interface 3. The two sides abutting the USB interface 3 are different in size, for example, the two sides can be different in length extending in the first direction to form a distinction, facilitating the recognition of the plug-in direction when the USB interface 3 is plugged into the first plug-in part 11, and playing a foolproof role in assembly. The inner side wall of the shell 7 is provided with a second plug-in part 12 in the first direction, and the second plug-in part 12 is provided with a slot for clamping the circuit board 1. When the USB interface 3 of the circuit board 1 is plugged into the first plug-in part 11 and the shell cover 8 is covered on the shell 7 in the first direction, the end of the circuit board 1 away from the USB interface 3 is plugged into the second plug-in part 12, and the second plug-in part 12 cooperates with the first plug-in part 11 to form a clamping assembly action on both ends of the circuit board 1.

[0068] In an embodiment, as shown in Figure 4 The end of the shell cover 8 away from the circuit board 1 is provided with a fixing structure 13 at the periphery of the mounting hole 81, and the fixing structure 13 is used for fixing the USB interface 3 on the inverter 14.

[0069] As an example, the end of the shell cover 8 away from the circuit board 1 is provided with a fixing structure 13 at the periphery of the mounting hole 81. The fixing structure 13 can be a nut structure provided with an opening, and the opening of the nut structure is opposite to the mounting hole 81 and is used for accommodating the USB interface 3 to pass through. Correspondingly, the periphery of the USB female head on the inverter 14 can be provided with a flange structure. When the USB male head provided on the circuit board 1 is plugged into the USB female head provided on the inverter 14, the fixing structure 13 on the shell cover 8 can be accommodated into the flange structure on the inverter 14 to support and fix the monitoring device.

[0070] The utility model embodiment provides a kind of photovoltaic monitoring system, as shown in Figure 7 It comprises inverter 14 and the monitoring device in any one of the above embodiments;The monitoring device is installed on the inverter 14, and communicates wirelessly with external equipment;The inverter 14 is connected with photovoltaic equipment, load and power grid;The inverter 14 is used for inverting the electric energy output by the photovoltaic equipment, and is transmitted to load and / or power grid;Or, the inverter 14 is used for inverting the electric energy output by the power grid, and is transmitted to load.

[0071] As an example, the photovoltaic monitoring system includes an inverter 14 and the monitoring device in any of the above embodiments. The inverter 14 is connected with the photovoltaic device, the load and the power grid, and is used to invert the power output by the photovoltaic device and transmit it to the load or the power grid, or invert the power output by the power grid and transmit it to the load. The monitoring device is installed on the inverter 14, and is used to exchange data with the inverter 14, obtain various monitoring data of the inverter 14 in the running process in real time, such as current parameters, voltage parameters, etc., and perform wireless communication with external devices, such as mobile terminals, routers, etc., transmit the monitoring data obtained in real time or the monitoring data temporarily stored in the storage module 22 to the APP on the external terminal and / or the server.

[0072] In the present example, the photovoltaic monitoring system can obtain and temporarily store the monitoring data of the inverter 14 in real time through the monitoring device, and transmit the monitoring data to the external device through the wireless communication module 23, so as to ensure the stable transmission of the monitoring data of the inverter 14 while reducing the wiring of the device and expanding the application range of the monitoring system, and meet the needs of users for real-time and accurate acquisition of the data of the inverter 14.

[0073] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A monitoring device, characterized in that, Includes a circuit board and a main control module and a USB interface mounted on the circuit board; One end of the USB interface is connected to the main control module, and the other end of the USB interface is used to plug into the inverter. The main control module is used to obtain the monitoring data of the inverter through the USB interface. The main control module includes a processor and a storage module and a wireless communication module connected to the processor; The storage module is connected to the USB interface and is used to store the inverter's monitoring data; The wireless communication module is used to communicate with external devices and send the monitoring data to the external devices.

2. The monitoring equipment according to claim 1, characterized in that, The wireless communication module includes a WIFI unit and / or a Bluetooth unit; The WIFI unit is connected to the storage module and the processor, and is used to communicate with external devices. And / or, the Bluetooth unit is connected to the storage module and the processor for communication with external devices.

3. The monitoring equipment according to claim 1, characterized in that, The circuit board is also equipped with a button module, which is connected to the main control module and is used to switch the wireless communication module in any of the following modes: on, off, and factory reset.

4. The monitoring equipment according to claim 1, characterized in that, The circuit board is also equipped with an indicator light module; the indicator light module includes an LED module, a control transistor, a pull-up resistor, and a voltage regulator capacitor. The power supply terminal of the LED module is connected to the first power supply terminal, and the control terminal of the LED module is connected to the processor through a control tube, which is used to operate according to the processing signal output by the processor to indicate the working status of the monitoring device. The first end of the pull-up resistor is connected to the connection node between the LED module and the control transistor, and the second end of the pull-up resistor is used to connect to the first power supply terminal. The first end of the voltage regulator capacitor is connected to the connection point between the first power supply terminal and the LED module, and the second end of the voltage regulator capacitor is grounded.

5. The monitoring device according to claim 1, characterized in that, The circuit board is also equipped with a power module, which is connected to the main control module and is used to provide power to the main control module.

6. The monitoring device according to claim 1, characterized in that, The monitoring equipment also includes a housing and a cover; The cover is mounted on the outer shell, and the two cooperate to form an installation space; The cover has mounting holes, the circuit board is assembled in the mounting space, and one end of the USB interface passes through the mounting holes for plugging into the inverter.

7. The monitoring device according to claim 6, characterized in that, The monitoring equipment also includes a snap-fit ​​structure disposed on the outer casing and cover; The snap-fit ​​structure includes a snap-fit ​​protrusion and a snap-fit ​​groove; one of the snap-fit ​​protrusion and the snap-fit ​​groove is disposed on the outer shell and the other is disposed on the shell cover, and the snap-fit ​​protrusion is used to snap into the snap-fit ​​groove.

8. The monitoring device according to claim 6, characterized in that, The monitoring equipment also includes a foolproof structure installed on the outer casing and cover; The foolproof structure includes two limiting components of different sizes, each of which includes a limiting protrusion and a limiting hole; One of the limiting protrusion and the limiting hole is provided on the outer shell, and the other is provided on the shell cover. The limiting protrusion is used to engage with the limiting hole.

9. The monitoring device according to claim 6, characterized in that, A first connector is provided on the shell cover along the first direction; The first connector is located at the outer edge of the mounting hole; The two opposite sides of the first connector have different dimensions, which are used to limit the two sides of the USB interface on the circuit board and prevent mistaken assembly. The outer casing is provided with a second connector along the first direction, which is used to limit the end of the circuit board away from the USB interface.

10. The monitoring device according to claim 6, characterized in that, The end of the cover away from the circuit board is provided with a fixing structure, which is located around the mounting hole and is used to fix the USB interface on the inverter.

11. A photovoltaic monitoring system, characterized in that, Includes an inverter and the monitoring device as described in any one of claims 1-10; The monitoring device is installed on the inverter and communicates wirelessly with external devices. The inverter is used to connect to photovoltaic equipment, loads, and the power grid; The inverter is used to invert the electrical energy output by the photovoltaic device and transmit it to the load and / or the power grid; or, the inverter is used to invert the electrical energy output by the power grid and transmit it to the load.

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