KR102021203B1 - System for sensing solar battery state and wireless sensor module applying the same - Google Patents

Abstract

Provided are a solar cell state detection system and a wireless sensor module applied thereto. The solar cell state detection system is connected to each of the plurality of solar cell modules one-to-one to measure each state information and transmit the event information generated based on the measured state information and a plurality of wireless sensor module And a master module for receiving and transmitting event information from the wireless sensor module, and when the difference between the measured state information and the reference value is greater than or equal to a certain threshold, the wireless sensor module can generate event information by detecting that an event has occurred. Maintenance personnel can be minimized by determining the exact position of faulty solar panels without frequent entry and exit in areas where solar panels are difficult to install and manage.

Description

System for sensing solar battery state and wireless sensor module applying the same}

The present invention relates to a solar cell state detection system and a wireless sensor module applied thereto, and more particularly, a solar cell state detection system and a wireless sensor module applied thereto that can perform smart defect monitoring and location tracking of a solar panel array. It is about.

The contents described in this section merely provide background information on the present embodiment and do not constitute a prior art.

 Currently, solar power plants constructed nationwide or around the world have a drastic fall in power efficiency due to a sharp drop in power efficiency when solar panels fail after installation. This power efficiency monitoring should be handled in real time and the defective solar panel should be replaced and repaired quickly. Accordingly, there is an urgent need to develop and install a real-time low power metering module for accurate positioning of defective solar panels and measurement of generated voltage / current.

The wired / wireless integrated photovoltaic monitoring device using multiple power sources is a technology that uses PLC and RS-485 communication protocols to measure voltage and current in string units and wires between strings. This technology is impossible to measure the voltage of each solar cell module, and the communication between the strings and the inverter is similarly wired communication, which leads to excessive wire and installation costs and high power consumption.

A photovoltaic monitoring device capable of diagnosing failure of each solar cell module and a method of diagnosing failure of a photovoltaic power generation system using the same are monitoring devices capable of diagnosing failure of a plurality of photovoltaic modules. It is a technique that allows the use of multiple wires to determine the location of strings, junctions and faulty strings while measuring. This technology is not only a communication line cost and installation cost due to the use of multiple communication lines, but also a failure diagnosis of each solar cell module is a technology that cannot measure in real time.

Smart sensors for solar panels is a technology that can detect the operating status of each solar panel. It uses four wires passing through each solar module to realize communication between solar cells. This technology uses a multiplexer circuit for each solar cell module, and uses a multiplexer circuit to transmit the voltage strength measured by each module to neighboring modules along with their respective addresses.

System and method for monitoring photovoltaic power generation systems measure the voltage of each solar panel module and wirelessly communicate with each other by RF communication devices mounted on each solar panel module by a single master module at the string node or central site. to be.

When many solar panels such as medium and large power plants are installed, each solar panel module must use independent frequencies, which is difficult to use because it requires too many frequency bands and cannot reuse frequency channels, and also requires remote RF communication. Power consumption has many disadvantages.

Monitoring of distributed power harvesting systems using DC power sources also uses two wires to transmit to each adjacent solar cell module, measuring voltage, current and temperature conditions within the module. This technology consumes a lot of power because the use of wires incurs cable installation costs and requires long distance wired transmissions. As shown in the figure below, in particular, current measurement is performed on each solar panel, so the cost is largely due to this sensor.

In ZigBee technology, network nodes form a mesh network and use some nodes as sensor nodes to provide sensor functions. However, this method affects the speed of the network as the number of sensor nodes increases. It results in a decrease in performance.

The present invention has been made to solve the above problems, an object of the present invention is to connect to each of a plurality of solar cell modules one-to-one to measure the respective state information and generated event information based on the measured state information And a master module for receiving and transmitting event information from the plurality of wireless sensor modules and transmitting the plurality of wireless sensor modules. The wireless sensor module includes an event if a difference between the measured state information and a reference value is greater than or equal to a specific threshold. The present invention provides a solar cell state detection system for detecting event occurrence and generating event information, and a wireless sensor module applied thereto.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

Solar cell state detection system according to an embodiment of the present invention for achieving the above object, is connected to each of the plurality of solar cell modules one-to-one to measure the respective state information and generated events based on the measured state information A plurality of wireless sensor modules for transmitting information; And a master module configured to receive and transmit event information from the plurality of wireless sensor modules, wherein the wireless sensor module detects that an event has occurred when a difference between the measured state information and a reference value is greater than or equal to a specific threshold. You can also create

The plurality of wireless sensor modules may include a plurality of wireless sensor module arrays configured of at least one wireless sensor module.

In addition, the wireless sensor module included in the wireless sensor module array wirelessly transmits event information to the next adjacent wireless sensor module, and the terminal wireless sensor module disposed at the end of the wireless sensor module array transmits the collected event information to the next wireless The terminal wireless sensor module of the final wireless sensor module array may transmit the collected event information to the master module.

In addition, when generating event information, the wireless sensor module included in the wireless sensor module array wirelessly transmits state information periodically measured for a predetermined period to the next adjacent wireless sensor module, and is disposed at the end of the wireless sensor module array. The terminal wireless sensor module transmits the collected state information to the next terminal wireless sensor module included in the next adjacent wireless sensor module array, and the terminal wireless sensor module of the final wireless sensor module array transmits the collected status information to the master module. It may be.

In addition, the wireless sensor module, the measuring unit for measuring the state information; A storage unit for storing a reference value and a specific threshold value; A controller configured to generate event information by detecting that an event has occurred when a difference between the measured state information and a reference value is equal to or greater than a specific threshold value; And a transceiver configured to transmit event information generated through an antenna as a wireless signal.

The reference value may be a value of state information measured by the wireless sensor module when there is no abnormality in the solar cell module.

In addition, the reference value may have an independent value for each wireless sensor module.

The reference value may be an average value of state information measured for a predetermined period by the wireless sensor module when there is no abnormality in the solar cell module.

In addition, the state information may be an output voltage or an output current of the solar cell module.

The wireless sensor module may measure state information only when the intensity of light measured by the light sensor during a specific time period of the day is greater than or equal to a specific value.

On the other hand, according to an embodiment of the present invention, the wireless sensor module included in the solar cell state detection system, measuring unit for measuring the state information; A storage unit for storing a reference value and a specific threshold value; A controller configured to generate event information by detecting that an event has occurred when a difference between the measured state information and a reference value is equal to or greater than a specific threshold value; And a transceiver configured to transmit event information generated through an antenna as a wireless signal.

According to various embodiments of the present disclosure, a plurality of wireless sensor modules and a plurality of wireless devices are connected to each of a plurality of solar cell modules one-to-one to measure respective state information and transmit event information generated based on the measured state information. And a master module that receives and transmits event information from the sensor module, wherein the wireless sensor module detects that an event has occurred and generates event information when a difference between the measured state information and a reference value is greater than a specific threshold. It is possible to provide a condition detection system and a wireless sensor module applied thereto, thereby minimizing maintenance personnel by determining the exact position of a faulty solar panel without frequent entry and exit in an area where a solar panel is difficult to install and manage. do.

Effects obtained in the present invention are not limited to the above-mentioned effects, and other effects not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as part of the detailed description in order to provide a thorough understanding of the present invention, provide embodiments of the present invention and together with the description, describe the technical features of the present invention.
1 is a block diagram showing the configuration of a solar cell state detection system according to an embodiment of the present invention;
2 is a block diagram showing a configuration of a wireless sensor module according to an embodiment of the present invention;
3 is a diagram illustrating a state information and event information transmission method of a wireless sensor module according to an embodiment of the present invention;
4 is a diagram illustrating a state information and event information transmission method of a wireless sensor module according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS To make the features and advantages of the present invention more clear, the present invention will be described in more detail with reference to specific embodiments shown in the accompanying drawings.

However, in the following description and the accompanying drawings, detailed descriptions of well-known functions or configurations that may obscure the subject matter of the present invention will be omitted. In addition, it should be noted that like elements are denoted by the same reference numerals as much as possible throughout the drawings.

The terms or words used in the following description and drawings should not be construed as being limited to the ordinary or dictionary meanings, and the inventors may appropriately define the concept of terms for explaining their own invention in the best way. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

In addition, terms including ordinal numbers, such as first and second, are used to describe various components, and are used only to distinguish one component from another component, and to limit the components. Not used. For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component.

In addition, when a component is referred to as being "connected" or "connected" to another component, it means that it may be connected or connected logically or physically.

In other words, although a component may be directly connected or connected to other components, it should be understood that other components may exist in the middle, and may be connected or connected indirectly.

In addition, the terms "comprises" or "having" described herein are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or the same. It is to be understood that the present invention does not exclude in advance the possibility of the presence or the addition of other features, numbers, steps, operations, components, parts, or a combination thereof.

In addition, the terms “… unit”, “… unit”, “module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. have.

Also, "a or an", "one", "the" and the like are also indicated differently herein in the context of describing the present invention (especially in the context of the following claims). Unless otherwise expressly contradicted by context, it may be used in the sense including both the singular and the plural.

Hereinafter, with reference to the drawings will be described the present invention in more detail.

1 is a block diagram showing the configuration of a solar cell state detection system according to an embodiment of the present invention.

A plurality of solar cell modules are installed in a solar power plant, and the plurality of solar cell modules are connected to each other to transfer electricity generated through solar power to an electric power source through an electrical system. Here, the solar cell module includes a solar panel, and converts solar energy into electrical energy to generate power.

The solar cell modules shown in FIG. 1 are arranged in an array form, and assuming that a total of M * N solar cell modules 10_1_1 to 10_M_N are arranged in M rows and N columns (M and N are natural numbers). ). However, of course, the solar cell module may be arranged in various forms.

The plurality of wireless sensor modules 100_1_1 to 100_M_N are connected one to one to each of the plurality of solar cell modules 10_1_1 to 10_M_N to measure respective state information and transmit event information generated based on the measured state information. At this time, the wireless sensor modules 100_1_1 to 100_M_N generate event information by detecting that an event has occurred when a difference between the measured state information and a reference value is greater than a specific threshold.

Here, the state information indicates information indicating the state of the solar cell module, and the output voltage or the output current may correspond thereto. For example, when a solar cell module fails, the output voltage may be zero or the output current may be zero. In addition, the output voltage or output current may change rapidly. In addition, even when the solar cell module is removed and stolen, the output voltage or output current becomes zero. Therefore, the state information, which is information for checking the state of the solar cell module, may be an output voltage or an output current.

In addition, the event indicates when the solar cell module is broken or stolen, and the event information is information indicating that a fault or theft has occurred in the solar cell module, and information on the event occurrence and the location of the solar cell module where the event occurred. Information on the event occurrence time, and the like.

In addition, the reference value indicates the value of the state information measured by the wireless sensor module when there is no abnormality in the solar cell module, and has a value independent for each wireless sensor module. Since each solar cell module may have a different environment or power generation amount, a reference value corresponding to each solar cell module is set separately. Therefore, each wireless sensor module measures the state information in the normal state of the corresponding solar cell module and learns it through machine learning to store the relevant state information data. For example, the reference value may be an average value of state information measured for a certain period by the wireless sensor module when there is no abnormality in the solar cell module.

In addition, the wireless sensor module may store and apply the reference value by classifying it by date, time zone, and light intensity. Since the amount of power generation of the solar cell module varies according to the intensity of light according to the weather according to the time of day and the time of day, the wireless sensor module measures and stores reference values according to various conditions in order to adaptively check state information. Specifically, the wireless sensor module may apply a correction value to the reference value for each month, set the reference value only during the daytime of the day, and change the reference value according to the light intensity measured by the light sensor. To this end, the wireless sensor module may include an optical sensor capable of measuring the light intensity.

The wireless sensor module may measure state information only when the light intensity measured by the light sensor during a specific time period of the day is greater than or equal to a specific value. For example, the wireless sensor module may measure state information of the corresponding solar cell module only when the light intensity measured by the light sensor during the time of the sun rises above the light intensity value on a clear day. Through this, the wireless sensor module can minimize the power consumption for operation.

As illustrated in FIG. 1, the plurality of wireless sensor modules 100_1_1 to 100_M_N include a plurality of wireless sensor module arrays configured of at least one wireless sensor module. In detail, in the case of FIG. 1, the plurality of wireless sensor modules include the first wireless sensor module arrays 100_1_1 to 100_1_N, the second wireless sensor module arrays 100_2_1 to 100_2_N, ..., the M-th wireless sensor module array 100_M_1 It can be seen that the configuration includes M wireless sensor module arrays (~ 100_M_N).

The wireless sensor module included in the wireless sensor module array wirelessly transmits event information to the next adjacent wireless sensor module, and the terminal wireless sensor module disposed at the end of the wireless sensor module array transmits the collected event information to the next wireless. The terminal is transmitted to the next wireless sensor module included in the sensor module array, and the wireless sensor module of the final wireless sensor module array transmits the collected event information to the master module 200.

In detail, the first_1 wireless sensor module 100_1_1 transmits state information and event information to the first_2 wireless sensor module 100_1_2. The first_2 wireless sensor module 100_1_2 transmits state information and event information to the first_3 wireless sensor module 100_1_3. In this manner, the wireless sensor module included in the wireless sensor module array wirelessly transmits state information and event information to the next adjacent wireless sensor module, and is a first wireless sensor module that is a terminal wireless sensor module of the first wireless sensor module array. 100_1_N transmits the state information and event information received from the first_N-1 wireless sensor module 100_1_N-1 to the second_N wireless sensor module 100_2_N, which is a terminal wireless sensor module of the second wireless sensor module array.

The second_N wireless sensor module 100_2_N transmits state information and event information collected by the third_N wireless sensor module, and sequentially transmits state information and event information to the M_N wireless sensor module 100_M_N. The M_N wireless sensor module 100_M_N transmits the collected state information and event information to the master module 200.

As such, the plurality of wireless sensor modules 100_1_1 to 100_M_N form a sensor network in a form of receiving and transmitting state information and event information for each array, and transmit the state information and event information to the master module 200. . At this time, the plurality of wireless sensor modules 100_1_1 to 100_M_N form an ad hoc network to communicate with each other and transmit information.

The plurality of wireless sensor modules 100_1_1 to 100_M_N may transmit state information periodically or only when an event occurs.

When transmitting only when an event occurs, the wireless sensor module included in the wireless sensor module array wirelessly transmits state information periodically measured for a predetermined period to the next adjacent wireless sensor module when generating event information. The terminal wireless sensor module disposed at the end of the wireless sensor module array transmits the collected state information to the next terminal wireless sensor module included in the next adjacent wireless sensor module array. The terminal wireless sensor module of the final wireless sensor module arrangement transmits the collected state information to the master module 200. Through this, the plurality of wireless sensor modules 100_1_1 to 100_M_N transmit only when an event occurs instead of transmitting status information every time, thereby minimizing power consumption and minimizing communication requirements caused by status information transmission. Will be.

The master module 200 receives event information from the plurality of wireless sensor modules 100_1_1 to 100_M_N and transmits the event information to the monitoring server 20.

That is, event information collected from the plurality of wireless sensor modules 100_1_1 to 100_M_N are integrated and transmitted to the master module 200. The master module 200 corresponds to the last node of the network by the plurality of wireless sensor modules, and transfers the collected event information to the monitoring server 20.

The monitoring server 20 serves as a server of the sensor network of the wireless sensor module and may be implemented by a mini PC (Linux-based, Raspberry Pi), which is an internet hub. The monitoring server 20 may include a network control and analysis program developed using the C ++ language, and output voltage or output of each wireless sensor module collected through the wireless sensor module network and transmitted through the master module 200. It collects status information such as current and event information and saves it in the internal flash memory. In addition, the monitoring server 20 acquires a web server access program (Web server client) through the Internet or the like so that users can monitor the solar cell modules using the state information and event information collected through the wireless sensor module. It can also include a DB access program (MySQL) to manage the data, and a graphic display module for troubleshooting within the solar power plant if necessary.

The solar cell state detection system having such a configuration enables minimization of maintenance personnel because it determines the exact position of the faulty solar panel without frequent entry and exit even in an area where it is difficult to install and manage the solar panel or a dangerous area.

2 is a block diagram illustrating a configuration of a wireless sensor module according to an embodiment of the present invention. Each of the plurality of wireless sensor modules 100_1_1 to 100_M_N has a configuration shown in FIG. 2.

As shown in FIG. 2, the wireless sensor module includes an antenna unit 110, a microwave transceiver 120, a measurement unit 130, a storage unit 140, and a controller 150.

The measuring unit 130 measures state information of the solar cell module. In detail, the measuring unit 130 may include a voltage measuring unit and a current measuring unit. The voltage measuring unit may be implemented in the form of measuring the voltage by connecting the output terminal of the solar cell module in parallel to divide the voltage, and the current measuring unit is connected in series with the output terminal of the solar cell module to measure the current May be

The antenna unit 110 transmits and receives a signal wirelessly, and may be a monopole or dipole antenna.

The ultra-high frequency transceiver 120 transmits the event information generated through the antenna unit 110 as a radio signal. Specifically, the ultra-high frequency transceiver 120 may perform modulation and demodulation for digital packet communication using 2.4 GHz ultra-high frequency state information using a DC power supply of the regulator chip.

In addition, the measuring unit 130 may include a temperature measuring unit for measuring the temperature of the solar cell module and an optical sensor for measuring the intensity of light reflected on the solar cell module.

The storage 140 may store a reference value and a specific threshold, and may store measured state information and event information. The storage 140 may be in the form of a First In First Out (FIFO) memory that temporarily stores data, or may be in the form of a flash memory that continues to store data.

The controller 150 controls the overall operation of the wireless sensor module. In detail, the controller 150 generates event information by detecting that an event has occurred when a difference between the measured state information and the reference value is greater than or equal to a specific threshold.

The wireless sensor module having such a configuration is included in the solar cell state detection system to perform sensor network communication configured as shown in FIG. 1.

Hereinafter, a method of transmitting status information and event information of the wireless sensor module will be described.

3 is a diagram illustrating a state information and event information transmission method of a wireless sensor module according to an embodiment of the present invention. 3 shows a transmission method in the case of always transmitting status information.

As shown in FIG. 3, the first_1 wireless sensor module 100_1_1 generates state information 1 and transmits the state information 1 to the first_2 wireless sensor module 100_1_2. Then, the first_2 wireless sensor module 100_1_2 generates the state information 2, multiplexes the state information 1, and transmits the state information 1 to the first_3 wireless sensor module 100_1_3.

The first_3 wireless sensor module 100_1_3 generates state information 3 and generates an event 3 when a failure occurs in the first_3 solar cell module 10_1_3, thereby multiplexing the state information 1 and state information 2 and the first_4 wireless sensor module. Send to (100_1_4).

Through such a process, the first wireless sensor module 100_1_N, which is an end wireless sensor module, collects state information and event information including state information 1 to state information N and event 3, and the second_N wireless sensor module ( 100_2_N).

When collecting and transferring the status information and event information in this way, the master module 200 can collect all the status information measured by all the wireless sensor modules and transmit it to the monitoring server 20, the user is a monitoring server Through 20, it is possible to periodically check the status of all solar cell modules and to check whether or not an event occurs. In addition, since the event information includes the location where the event occurred, the monitoring server 20 can determine the location of the solar cell module in which the event occurred.

However, if the state information is always transmitted in this manner, the wireless sensor modules consume more power because the data transmission amount increases. Accordingly, the wireless sensor module may perform a method of delivering only event information when an event occurs.

4 is a diagram illustrating a state information and event information transmission method of a wireless sensor module according to another embodiment of the present invention.

As shown in FIG. 4, the first_1 wireless sensor module 100_1_1 generates state information 1 and transmits the state information 1 to the first_2 wireless sensor module 100_1_2. Then, the first_2 wireless sensor module 100_1_2 generates the state information 2, multiplexes the state information 1, and transmits the state information 1 to the first_3 wireless sensor module 100_1_3.

The first_3 wireless sensor module 100_1_3 generates state information 3 and generates an event 3 when a failure occurs in the first_3 solar cell module 10_1_3, thereby multiplexing the state information 2 to the first_4 wireless sensor module 100_1_4. send.

Through this process, the first_N wireless sensor module 100_1_N, which is an end wireless sensor module, collects state information and event information including state information N-1, state information N, and event 3, among which event information is included. Only event 3 is transmitted to the second_N wireless sensor module 100_2_N.

When collecting and delivering only event information in this manner, the master module 200 can collect only event information generated by all wireless sensor modules and transmit the event information to the monitoring server 20. Only the state of the solar cell module in which the event occurs can be checked. In addition, since the event information includes the location where the event occurred, the monitoring server 20 may identify the location of the solar cell module where the event occurred.

If only the event information is transmitted in this way, the wireless sensor modules can minimize the data transmission amount, thereby minimizing power consumption.

On the other hand, the technical idea of the present invention can be applied to a computer-readable recording medium containing a computer program for performing the functions and methods of the solar cell state detection system and the wireless sensor module according to the present embodiment. In addition, the technical idea according to various embodiments of the present disclosure may be implemented in the form of computer readable programming language code recorded on a computer readable recording medium. The computer-readable recording medium can be any data storage device that can be read by a computer and can store data. For example, the computer-readable recording medium may be a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical disk, a hard disk drive, a flash memory, a solid state disk (SSD), and the like. In addition, the computer-readable code or program stored in the computer-readable recording medium may be transmitted through a network connected between the computers.

Although the specification and drawings describe exemplary device configurations, the functional operation and implementation of the subject matter described herein may be embodied in other types of digital electronic circuitry, or include the structures and structural equivalents disclosed herein. It may be implemented in computer software, firmware or hardware, or a combination of one or more of them.

Therefore, although the present invention has been described in detail with reference to the above-described examples, those skilled in the art to which the present invention pertains can make modifications, changes, and modifications to these examples without departing from the scope of the present invention.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

10_1_1 ~ 10_M_N: Solar Cell Module
100_1_1 ~ 100_M_N: Wireless Sensor Module
110: antenna unit
120: ultra-high frequency transceiver
130: measuring unit
140: storage unit
150: control unit
200: master module
20: monitoring server

Claims (11)

A plurality of wireless sensor modules connected one-to-one to each of the plurality of solar cell modules to measure respective state information and transmit event information generated based on the measured state information; And
And a master module for receiving and transmitting event information from the plurality of wireless sensor modules.
Wireless sensor module,
It includes an optical sensor for measuring the intensity of light, and if the difference between the measured state information value and the reference value is greater than a certain threshold, the event is detected to generate event information, and measured by the optical sensor during a certain time of day Status information is measured only when the intensity of light is above a certain value, and the reference value is classified and stored by date, time zone, and light intensity, and the correction value is applied to the reference value by month and measured by the light sensor. Solar cell state detection system, characterized in that for changing the reference value according to the light intensity.
The method according to claim 1,
The plurality of wireless sensor modules,
Solar cell state detection system comprising a plurality of wireless sensor module array consisting of at least one wireless sensor module.
The method according to claim 2,
The wireless sensor module included in the wireless sensor module array wirelessly transmits event information to the next adjacent wireless sensor module.
The terminal wireless sensor module disposed at the end of the wireless sensor module array transmits the collected event information to the next terminal wireless sensor module included in the next adjacent wireless sensor module array.
End wireless sensor module of the final wireless sensor module array, the solar cell state detection system, characterized in that for transmitting the collected event information to the master module.
The method according to claim 2,
When generating event information, the wireless sensor module included in the wireless sensor module array wirelessly transmits state information periodically measured for a predetermined period to the next adjacent wireless sensor module.
The distal wireless sensor module disposed at the distal end of the wireless sensor module array transmits the collected status information to the next distal wireless sensor module included in the next adjacent wireless sensor module array.
End wireless sensor module of the final wireless sensor module array, the solar cell state detection system, characterized in that for transmitting the collected state information to the master module.
The method according to claim 1,
Wireless sensor module,
A measuring unit measuring state information;
A storage unit for storing a reference value and a specific threshold value;
A controller configured to generate event information by detecting that an event has occurred when a difference between the measured state information and a reference value is greater than or equal to a specific threshold; And
And a transceiver configured to transmit the event information generated by the antenna as a wireless signal.
The method according to claim 1,
The reference value is
Solar cell state detection system, characterized in that the value of the status information measured by the wireless sensor module when there is no abnormality in the solar cell module.
The method according to claim 6,
The reference value is
Solar cell state detection system, characterized in that each has a independent value for each sensor module.
The method according to claim 7,
The reference value is
The solar cell state detection system, characterized in that the average value of the state information measured for a certain period by the wireless sensor module when there is no abnormality in the solar cell module.
The method according to claim 1,
Status information,
Solar cell state detection system, characterized in that the output voltage or output current of the solar cell module.
delete In the wireless sensor module included in the solar cell state detection system,
A measuring unit measuring state information;
A storage unit for storing a reference value and a specific threshold value;
A controller configured to generate event information by detecting that an event has occurred when a difference between the measured state information and a reference value is greater than or equal to a specific threshold; And
And a transceiver configured to transmit event information generated through an antenna as a wireless signal.
Wireless sensor module,
It includes an optical sensor for measuring the intensity of light, and if the difference between the measured state information value and the reference value is greater than a certain threshold, the event is detected to generate event information, and measured by the optical sensor during a certain time of day Status information is measured only when the intensity of light is above a certain value, and the reference value is classified and stored by date, time zone, and light intensity, and the correction value is applied to the reference value by month and measured by the light sensor. Wireless sensor module, characterized in that for changing the reference value according to the light intensity.

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