KR20210059281A - Solar pavement marker - Google Patents

Abstract

The present invention relates to a solar pavement marker which has a wireless communication module and opens a wireless communication channel when receiving a pulse from a management terminal is opened, and updates the built-in software of the solar pavement marker, thereby strengthening and updating environmental security. In addition, as the voltage of a solar cell changes easily according to the residual voltage of a large-capacity battery, the solar pavement marker has a switch between the solar cell and the battery to make the illuminance, which is the standard for turning on or off the solar pavement marker, constant to terminate a charging mode when measuring the illuminance, thereby being turned on or off at a constant illuminance. To achieve the purposes, the solar pavement marker comprises: a charging module for storing energy received from a solar cell; a switch for switching a connection with the charging module in order to minimize the influence of the charging module when an ambient illuminance is measured; a magnetic field-based communication module for providing location information and receiving built-in software update files; and a control module for updating the built-in software via the update files. The communication module includes: a first communication unit for opening a wireless communication channel when receiving a magnetic field pulse from a management terminal; and a second communication unit for receiving the update files from the management terminal through the wireless communication channel.

Description

Solar PAVEMENT MARKER}

The present invention relates to a solar label bottle, and more particularly, to a solar label bottle that controls the charging of the solar label bottle when measuring the surrounding illuminance, and updates software embedded in the solar label bottle by having a communication module.

The solar beacon is a solar rechargeable light emitting device attached to the ground, and stores sunlight during the day and lights up at night to illuminate dark alleyways. Solar markers are installed on the center line of the road, the edge, the boundary line of the sidewalk, the boundary line of the bicycle path, the boundary line of the dangerous area, the boundary line of the area where street lights are not installed, the boundary line of the coastal road, and the boundary line of the construction site. It makes it possible to prevent accidents and accidents that occur.

Since the solar cell of the solar marker bottle has less power compared to that of the large-capacity battery, the voltage of the solar cell varies according to the residual voltage of the large-capacity battery, and the illumination that is the standard for the solar marker on and off is not constant, and the efficiency of the battery decreases, especially in winter. As a result, there is a problem that the lighting and lighting time of the solar marker bottle is not uniform. In addition, since it is installed on the road and requires shock, dust and waterproof structure, it is not easy to change or upgrade the interior after initial installation, and if the wireless communication channel is always open to transmit and receive information, it may be exposed to hacking. There is a problem.

Accordingly, there is a need for a technology for maintaining a constant illuminance when turning on and off the solar label bottle and a communication security technology for safely upgrading the software embedded in the solar label bottle.

The present invention is to solve the above-described problem, by providing a separate switch between the battery and the solar cell of the solar label, when measuring the ambient illuminance by blocking the connection to the charging module to reduce the residual voltage and external temperature of the battery. Its purpose is to turn on and off at a certain illuminance without affecting it.

In addition, an object of the present invention is to improve convenience by setting a reference time and automatically turning off when the lighting time exceeds the reference time in turning on and off the solar marker bottle.

Another object of the present invention is to enhance the security of the update environment by providing a wireless communication module in a solar label bottle to open a wireless communication channel when a pulse is received from a management terminal, and to transmit and receive files using the open wireless communication channel. .

In order to achieve this object, the present invention provides a charging module for storing energy received from a solar cell, a switch for switching the connection with the charging module in order to minimize the influence of the charging module when measuring ambient illuminance, and providing location information, and A magnetic field-based communication module for receiving a built-in software update file and a control module for updating built-in software through the update file, wherein the communication module opens a wireless communication channel when a magnetic field pulse is received from the management terminal. 1 communication unit, and a second communication unit for receiving the update file from the management terminal through the wireless communication channel.

In addition, in the method of updating the built-in software in the solar label bottle, receiving a magnetic field pulse including the unique identification information and/or a first encryption key of the solar label bottle from a management terminal, the unique identification information and/or the first encryption key Opening a wireless communication channel by verifying a magnetic field pulse using a key, receiving an update file including an update code and/or a second encryption key from the management terminal using the wireless communication channel, and the second And verifying an update file using an encryption key and updating the built-in software.

According to the present invention as described above, a separate switch is provided between the solar cell of the solar label bottle and the battery, and the connection with the charging module is cut off when measuring the ambient illuminance, so that it is constant without the influence of the residual voltage and external temperature of the battery. It can be turned on and off in the illuminance.

In addition, the present invention can improve convenience by automatically turning off the solar marker bottle when the lighting time exceeds the reference time by setting a reference time.

In addition, according to the present invention, when a pulse is received from a management terminal by including a wireless communication module in the solar label bottle, a wireless communication channel is opened, and files are transmitted and received using the open wireless communication channel, thereby reinforcing the security of the update environment.

1 is a view showing the configuration of a solar label bottle according to an embodiment of the present invention.
2 is a circuit diagram for implementing a solar labeling bottle according to an embodiment of the present invention.
3 is a flowchart illustrating a method of updating a solar label according to an embodiment of the present invention.

The above-described objects, features, and advantages will be described later in detail with reference to the accompanying drawings, and accordingly, a person of ordinary skill in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, a detailed description will be omitted.

In the drawings, the same reference numerals are used to indicate the same or similar elements, and all combinations described in the specification and claims may be combined in any manner. And, unless otherwise specified, it should be understood that references to the singular may include more than one, and references to the singular may also include the plural.

The terms used in this specification are for the purpose of describing specific exemplary embodiments only and are not intended to be limiting. Singular expressions as used herein may also be intended to include plural meanings unless clearly indicated otherwise in the corresponding sentence. The term "and/or," "and/or" includes all combinations and any of the items listed in connection therewith. The terms "comprises", "comprising", "comprising", "having", "having", "having", etc. have inclusive meanings, and accordingly, these terms are used as described features, integers, It specifies steps, actions, elements, and/or components, and does not preclude the presence or addition of one or more other features, integers, steps, actions, elements, components, and/or groups thereof. The steps, processes, and actions of the methods described herein should not be construed as necessarily performing their performance in the particular order discussed or illustrated, unless the order in which they are specifically performed is determined. . It should also be understood that additional or alternative steps may be used.

In addition, each component may be implemented as a hardware processor, the above components may be integrated to be implemented as a single hardware processor, or the above components may be combined with each other to be implemented as a plurality of hardware processors.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing the configuration of a solar label according to an embodiment of the present invention. Referring to FIGS. 1 and 2, the solar label is a solar cell 100, a charging module 200, a battery 300, a switch ( 400), a communication module 500, a control unit 600, and may include a timer 700.

First, the solar label bottle according to an embodiment of the present invention further includes a Hall sensor (not shown), and it is possible to recognize whether a magnet is attached to the outside of the solar label bottle. The solar label bottle can block the lighting of the solar label bottle by determining whether a magnet is attached to the outside of the solar label bottle through a hall sensor. This can prevent the solar labeling bottle from being completely discharged when the product is shipped as it is packaged in an unattached state after being produced.

The solar cell 100 is a device that converts light energy of sunlight into electrical energy, and it is sufficient to use a solar cell that is generally used in the related art. The solar cell 100 will obtain energy from sunlight.

The charging unit 200 will charge the battery 300 with energy obtained from the solar cell 100. The charging unit 200 may convert energy into energy usable in the solar label bottle. The charging unit 200 may include a DC/DC converter and an analog digital converter (ADC). The battery 300 may be a secondary battery such as a lithium polymer battery, a lithium ion battery, or a nickel hydride battery.

When the solar cell 100 having a higher charging voltage than the battery 300 is used to charge the battery 300, the efficiency of the solar cell 100 may be lowered. Therefore, the solar labeling bottle according to an embodiment of the present invention can increase charging efficiency by more than two times by using a nickel hydride battery that is 1/3 of the charging voltage of a general secondary battery.

The switch 400 may switch the charging mode and the lighting mode in order to measure the peripheral intensity irrespective of the remaining amount of the battery. The switch 400 may include a first switch 430 for switching an input to measure ambient illuminance and a second switch 460 for switching a charging mode and a lighting mode. By configuring the first switch 430 and the second switch 460 separately as described above, it is possible to prevent the impedance due to the remaining amount of the battery from affecting the measurement of brightness and illuminance of a solar sign.

The first switch 430 may terminate the charging mode in order not to be affected by the remaining amount of the battery 300 in measuring the illuminance. Accordingly, the first switch 430 will operate when the solar label bottle is in the charging mode.

The first switch 430 is an input switching switch for switching the charging mode, and by terminating the charging mode when measuring the illuminance, the solar marker can be turned on and off at a more accurate illuminance.

The second switch 460 may distinguish between day and night by comparing the measured ambient illuminance with a preset illuminance threshold. Therefore, the illuminance threshold will be set to a value that can distinguish day and night. When the ambient illuminance is higher than the illuminance threshold value, the second switch 460 sets the solar marker to the charging mode and blocks the lighting of the on/off lights.

The second switch 460 may set the solar label bottle to the charging mode when the state where the measured ambient illuminance is higher than the illuminance threshold value continues for more than a preset first duration time. The first duration is according to the value set by the administrator from 3 seconds to 30 seconds. By setting the first duration, it is possible to prevent a temporary increase in illuminance due to lighting such as a vehicle light.

When the ambient illuminance is lower than the illuminance threshold value, the second switch 460 ends the charging mode and sets the solar marker to the lighting mode.

According to another embodiment of the present invention, when the solar marker bottle is in the lighting mode, the second switch 460 checks the duration of the lighting mode measured through the timer 700, and the duration is a preset second duration time. If it is abnormal, the lighting mode will be forcibly terminated and the solar marker will be set to standby mode. The second duration may be set according to a time range in which the ambient illuminance is lower than the illuminance threshold value, and 16 hours may be set as a default value. Through this, the solar marker bottle of the present invention can conveniently control the lighting and lighting of the solar marker bottle through only the second duration without measuring the illuminance each time.

According to another embodiment of the present invention, when the solar label bottle is in the standby mode, the second switch 460 may set the solar label bottle to the charging mode every predetermined period based on the timer 700.

The communication module 500 provides location information of the solar marker and may perform magnetic field-based synchronous and/or asynchronous communication. The communication module 500 may include a first communication unit 530 for opening a wireless communication channel upon receiving a magnetic field pulse from a management terminal and a second communication unit 560 for receiving an update file through a wireless communication channel. The communication module 500 may perform asynchronous wireless communication with the management terminal such as LoRa, beacon, Bluetooth, and Wi-Fi.

The solar marker is provided with at least one electromagnet so that the first communication unit 530 and/or the second communication unit 560 can communicate with the management terminal using synchronous communication. The communication unit using synchronous communication can use an SCL electromagnet and an SDA electromagnet. The communication department will use two electromagnets to receive sync pulses and data files respectively.

The first communication unit 530 may open a wireless communication channel by performing synchronous and/or asynchronous communication with the management terminal.

The first communication unit 530 may periodically broadcast the location information of the solar label bottle and server information to provide the location information and server information of the solar label bottle to a user terminal located near the solar label bottle. The user terminal receiving the location information of the solar marker bottle and the server information can calculate the current location using the location information of the solar marker bottle, and access the server using the server information to receive road issue information corresponding to the current location. have.

Through this, the server can provide a risk notification function by providing the location of a pedestrian crossing and a government office to the user, and it can be particularly useful to a blind person who cannot see or have dark eyes at night. Furthermore, when the solar marker is installed in a tourist destination or a historic site, a tourist notification function may be provided to the user.

According to an embodiment of the present invention, the solar marker is installed on a road, and when the management terminal irradiates a magnetic field pulse near the solar marker, the management terminal may be verified by receiving the magnetic field pulse.

More specifically, the first communication unit 530 receives at least one of unique identification information of the communication module 500 from the management terminal, a first encryption key for a first communication protocol used by the first communication unit 530, or a checksum. Upon receiving the included magnetic field pulse, the management terminal will be verified using the information included in the magnetic field pulse.

The first communication unit 530 will verify the management terminal by comparing the information included in the magnetic field pulse with the previously stored unique identification information and the first encryption key of the first communication protocol.

In verifying the management terminal, the first communication unit 530 may block access of the management terminal for a predetermined time if the unique identification information and/or the first encryption key do not match for a predetermined number of times or more. For example, the first communication unit 530 blocks the access of the management terminal for 30 seconds if the unique identification information and/or the first encryption key does not match three or more times, and if it does not match more than three times thereafter, 30 It will block access to the management terminal for a minute. Through this configuration, the solar label bottle of the present invention has an effect of excellent security by blocking access to external devices.

The first communication unit 530 will open a wireless communication channel when it is verified that the management terminal is valid.

The second communication unit 560 may perform wireless communication with the management terminal using a wireless communication channel opened by the first communication unit 530. The second communication unit 560 may receive the update file from the management terminal and transmit the state of the solar marker.

The second communication unit 560 may use the program jig as an intermediate medium in communication with the management terminal, or may directly communicate with the management terminal. When the program jig is used as an intermediate medium, the second communication unit 560 may perform wireless communication (magnetic field and/or visible light communication) with the program jig connected to the management terminal via USB.

The second communication unit 560 may receive an update file of the built-in software of the solar label bottle through the management terminal. The update file may include an update code and a second encryption key of a second communication protocol used by the second communication unit 560.

The second communication unit 560 may determine whether the first version information is newer than the second version information by comparing the first version information of the update file with the second version information of the pre-stored current file. If the first version information is newer than the second version information, the second communication unit 560 will determine that the update file is valid.

Furthermore, the second communication unit 560 may compare the second encryption key included in the update file with the previously stored second encryption key of the second communication protocol. The second communication protocol The second encryption key may be set to 16 bits or more to enhance security.

In verifying the update file, the second communication unit 560 may block access of the management terminal for a certain time if the second encryption key does not match a certain number of times or more.

The second communication unit 560 according to another embodiment of the present invention may use an asymmetric encryption algorithm in communication between the second communication unit 560 and the management terminal. The second communication unit 560 may use RSA, elliptic curve encryption, and electronic signature as encryption algorithms. The second communication unit 560 may share the public key with the management terminal in advance, and decrypt the update file generated by the management terminal encrypting the update code using the held private key.

The controller 600 may control the switch 400 and update software embedded in the solar label bottle using the received update file. In updating the built-in software, the controller 600 quickly flashes the solar labeling bottle from the moment when the first communication unit 530 and the second communication unit 560 operate to the moment the update is completed, thereby minimizing current consumption with the same brightness. can do. According to an embodiment of the present invention, if the amount of charge of the battery 300 is less than 75% while the update is in progress, the control unit 600 can minimize the brightness of the solar label and increase the operating time by two or more times.

Further, the controller 600 may control the lighting of the solar marker bottle based on the operation of the switch 400 and the ambient illuminance. The controller 600 will control the lighting of the solar label bottle according to the amount of charge of the battery 300 shown in Table 1. The condition of the charging amount of the battery 300 described in Table 1 can be changed according to the settings of the administrator.

BAT voltage/LED condition table NO. Voltage LED/charging status One 1.52 Stop charging (overcharge) 2 1.5 100% brightness on/charging 3 1.3 100% brightness on/charging 4 1.1 Lighting reference voltage 5 1.05 30% brightness on/charging 6 0.95< Flashing 20%/Brightness 20%/Charging 7 0.95 Off reference voltage (standby mode) 8 0.8 Standby/Charge (over-discharge) 9 0.7 Standby/Charge (over-discharge) 10 0.6 Standby/Charge (over-discharge)

For example, if the amount of charge of the battery 300 is more than a preset overcharge reference value, the controller 700 determines that the battery 300 is in an overcharge state, ends the charging mode, and sets the standby mode to damage the battery 300. Can be prevented. The standby mode is to minimize the power consumption of the battery 300 so that the battery 300 does not consume unnecessary power. As shown in Table 1, the controller 700 controls the battery 300 according to the voltage of the battery 300. You can check the status (over-discharge, over-charge), flash on/off lights, or control the brightness to extend the operating time of the solar marker.

Hereinafter, a method of updating the software embedded in the solar label bottle according to an embodiment of the present invention will be described with reference to FIG. 3. In the description of the method for updating the software embedded in the solar label bottle, detailed embodiments overlapping with the above-described solar label bottle may be omitted.

In step 100, the solar marker may receive a magnetic field pulse from the management terminal. The magnetic field pulse may include at least one of unique identification information of the communication module of the solar label, a first encryption key for a first communication protocol, or a checksum.

In step 110, the solar marker will verify the magnetic field pulse received from the management terminal using the previously stored unique identification information and the first encryption key. At this time, the solar marker can open a wireless communication channel when it is determined that the magnetic field pulse is effective.

In step 120, the solar marker may receive an update file from the management terminal using an open wireless communication channel. In this case, the solar marker may transmit state information of the solar marker using a wireless communication channel.

In step 130, the solar marker may verify the received update file. In order to verify the update file, the solar marker may compare first version information of the update file and second version information of a previously stored current file. The solar marker will determine that the update file is valid if the first version information is newer than the second version information.

In step 140, if the solar marker determines that the version information of the update file is valid, it may compare the second encryption key for the second communication protocol included in the update file with the previously stored second encryption key. In this case, the solar marker may use an asymmetric encryption algorithm without using an encryption key.

In step 150, the solar label bottle may update software embedded in the solar label bottle using the verified update file.

The embodiments of the present invention disclosed in the present specification and drawings are provided only to provide specific examples to easily explain the technical content of the present invention and to aid understanding of the present invention, and are not intended to limit the scope of the present invention. It is obvious to those of ordinary skill in the art that other modifications based on the technical idea of the present invention can be implemented in addition to the embodiments disclosed herein.

Claims (7)

A charging module for storing energy received from the solar cell;
A switch for switching a connection with the charging module to minimize the influence of the charging module when measuring ambient illumination;
Magnetic field-based communication module for providing location information and receiving an embedded software update file; And
Including a control module for updating the built-in software through the update file,
The communication module,
A first communication unit for opening a wireless communication channel upon receiving a magnetic field pulse from the management terminal;
And a second communication unit receiving the update file from the management terminal through the wireless communication channel.
The method of claim 1,
The switch,
In order to turn on and off based on a constant illuminance irrespective of the remaining battery capacity of the solar marker, when the solar marker bottle is in the charging mode, the solar marker bottle terminates the charging mode when measuring the illuminance.
The method of claim 1,
If the solar marker bottle is in the lighting mode, further comprising a timer for measuring the duration of the lighting mode,
The switch,
If the solar label bottle is in the lighting mode and the duration is longer than a preset second duration, the lighting mode is terminated, and the solar label bottle is set to the standby mode, and if the solar label bottle is in the standby mode, the solar label is set to the charging mode at regular intervals. Marker disease.
The method of claim 1,
The first communication unit,
Receives a magnetic field pulse including at least one of unique identification information of the communication module, a first encryption key for a first communication protocol used by the first communication unit, or a checksum from the management terminal, and using the magnetic field pulse A solar marker for opening the wireless communication channel by verifying the management terminal and verifying that the management terminal is valid.
The method of claim 1,
The second communication unit includes at least one electromagnet,
The second communication unit receives an update file from the management terminal through the wireless communication channel, and communicates with the management terminal using the electromagnet.
The method of claim 1,
The second communication unit,
A solar marker for verifying the update file by comparing first version information of the update file with second version information, which is a current version of the communication module, to determine whether the first version information is newer than the second version information.
In the method of updating the built-in software in the solar marker,
Receiving a magnetic field pulse including a first encryption key and/or unique identification information of the solar labeling bottle from a management terminal;
Opening a wireless communication channel by verifying a magnetic field pulse using the unique identification information and/or a first encryption key;
Receiving an update file including an update code and/or a second encryption key from the management terminal using the wireless communication channel; And
And verifying an update file using the second encryption key and updating the built-in software.

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