KR20210124101A - IoT device control and detection system using RS-485 communication module - Google Patents

Abstract

According to an embodiment of the present invention, an Internet of Things (IoT) device control and detection system comprises: an IoT devices; a user device that provides state information of the IoT device; a slave RS-485 communication module that receives a control signal from a server and transmits it to the IoT device; a master RS485 communication module that receives the state signal from the server and transmits it to the user device through a direct digital controller (DDC); and a server transmitting the control signal to the slave RS-485 communication module corresponding to the master RS-485 communication module. Therefore, the Internet of Things (IoT) device control and detection system increases facility management stability and convenience.

Description

IoT device control and detection system using RS-485 communication module

This specification proposes an IoT device control and detection system using a 485-communication module and an apparatus therefor.

In general, the method of exchanging information with the outside can be divided into two types: parallel communication and serial communication. When exchanging information with devices in a computer, a high-speed communication speed is usually required, so a parallel communication method capable of processing a lot of information at once is mainly used. This is because the performance of a computer can be improved by processing a large amount of information at once in a short time.

However, the parallel communication method cannot be used in all cases. The reason is that the communication distance is limited, the implementation is technically difficult, and the cost is too high. Also, there are many cases where the application itself does not require a high-speed communication speed. For this reason, when a computer communicates with the outside, the serial communication method is often used.

The serial communication method is a method of transmitting and receiving data bits to and from the outside in units of one bit. have. Typical examples of serial communication include modem, LAN, and RS-232. Furthermore, if serial communication is divided again, it can be divided into two types: an asynchronous method and a synchronous method.

RS-232 is one of the electrical signal methods that interfaces the digital signal from the asynchronous communication controller with the outside and corresponds to the asynchronous method. Asynchronous communication controllers are commonly referred to as UARTs (Universal Asynchronous Receiver & Transmitter). Since the signal coming from the UART usually has a TTL (Time To Live) signal level, it is weak against noise and has a limited communication distance. An interface IC that receives these TTL signals as input and is strong against noise and allows to go far is called LINE DRIVER/RECEIVER, and among them, RS-422 and RS-485 are representative.

In general, IoT devices communicate with the server based on the RS-485 communication protocol.

However, even if these IoT devices are distributed in multiple areas or remote areas, or because of their high risk and importance, it is impossible/difficult to install separate wiring and communication cables (e.g., nuclear/ In case of being located in a solar power plant, etc.), there is a limit in terms of distance/security in communication between the IoT device and the server only with the RS-485 communication protocol, which is a wired communication protocol.

In an Internet of Things (IoT) device control and detection system according to an embodiment of the present invention, the IoT device; Receives a control input for controlling the IoT device, generates and transmits a control signal including the control input, receives a status signal related to the status of the IoT device, and controls the IoT device included in the status signal. a user device that provides status information; a slave RS-485 communication module that receives the status signal from the IoT device and transmits it to a server, and receives the control signal from the server and transmits it to the IoT device; A master RS-485 communication module that receives the control signal from the user device through a DDC (Direct Digital Controller) and transmits it to the server, receives the status signal from the server and transmits it to the user device through the DDC ; and receiving the status signal from the slave RS-485 communication module and transmitting the status signal to a master RS-485 communication module corresponding to the slave RS-485 communication module, and the control signal from the master RS-485 communication module a server for receiving and transmitting the control signal to a slave RS-485 communication module corresponding to the master RS-485 communication module; Including, wherein the slave and master RS-485 communication modules include: a first communication module for using a first communication protocol and a communication module into which a second communication module for using a second communication protocol is inserted and mounted insert; comprising, selectively activating a communication protocol in which a signal strength is measured to be higher as a result of performing test communication with the server using the first and second communication protocols to communicate with the server, and the IoT device Alternatively, the DDC performs communication based on an RS-485 communication protocol, wherein the first communication protocol is Wi-Fi (Wireless Fidelity), the second communication protocol is LTE (Long-Term Evoluation), and the IoT device When a plurality of slave RS-485 communication modules are included in the control and detection system: Among the plurality of slave RS-485 communication modules, one of the first slave RS-485 communication modules is set as a gateway node, and the remaining slave RS -485 communication module is set as a relay node, the signal transmission order between the relay nodes is determined based on at least one of a distance to another relay node and a distance to the gateway node, and the gateway node is configured to use the second communication protocol communicates with the server using only A beamforming technology is applied to a signal transmitted and received between the servers through the second communication protocol, and when the server receives an abnormal state signal indicating a dangerous state or operation abnormality of the IoT device from the IoT device, the abnormal state The status signal is transmitted to the user device with the highest priority using only the second communication protocol, but the abnormal status signal is transmitted using the emergency message transmission service predefined in the second communication protocol, and the slave The RS-485 communication module includes a connection part for mounting or connecting to the IoT device, and the slave RS-485 communication module controls the IoT device and the connection part through the connection part. When the existing communication module is installed as an alternative to or additionally to the IoT device not registered in the detection system: The slave RS-485 communication module transmits a signal for registering the unregistered IoT device to the server, and the server The signal transmitted from the unregistered IoT device is transmitted to the master RS-485 communication module, and the master RS-485 communication module transmits the signal transmitted from the unregistered IoT device to the user device through the DDC, The user device integrates the unregistered IoT device into the IoT device control and detection system by registering the unregistered IoT device, wherein the IoT device: A communication unit that performs communication based on the RS-485 communication protocol ; a memory unit for storing digital data; and a control unit that controls the communication unit and the memory unit, including a refrigerator, a thermometer, lighting, an air conditioner, a thermometer, a hygrometer, a cleaner, a washing machine, a dehumidifier, a dryer, a speaker, a microwave oven, a gas stove, a switchboard, and a distribution board , switchgear, TV, DVD, electric vehicle, blind, CCTV, drone, PC, tablet PC, wearable device, boiler, air purifier, humidifier, camera, sensor, solar power plant, nuclear power plant and/or wind power plant may be applicable.

According to an embodiment of the present invention, since it can be installed even in an indoor facility where network construction is impossible or difficult (eg, solar/nuclear power plant facility, etc.), it is possible to monitor the indoor facility in real time, so that the facility management stability and It has the effect of increasing convenience.

In addition, according to an embodiment of the present invention, there is an effect that an IoT device based on the RS-485 communication protocol can be controlled even from a long distance.

In addition, according to an embodiment of the present invention, since a communication protocol (eg, LTE) having a relatively high security level is (selectively) used for a control signal requiring security, the risk of hacking is low and security is guaranteed has the effect of being

1 is a schematic diagram of an IoT control and sensing system according to an embodiment of the present invention.
2 is a diagram illustrating an RS-485 communication module using an LTE communication protocol according to an embodiment of the present invention.
3 is a diagram illustrating an RS-485 communication module performing a function as a relay node according to an embodiment of the present invention.
4 is a diagram illustrating a user device providing state information of an IoT device according to an embodiment of the present invention.
5 is a diagram illustrating an embodiment in which an IoT device is integrated into an IoT control and detection system according to an embodiment of the present invention.
6 is a block diagram of a server, an RS-485 communication module, and a user device according to an embodiment of the present invention.

Since the technology to be described below may have various changes and may have various embodiments, specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the technology described below to specific embodiments, and it should be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the technology described below.

Terms such as first, second, A, and B may be used to describe various components, but the components are not limited by the above terms, and only for the purpose of distinguishing one component from other components. used only as For example, a first component may be named as a second component, and similarly, a second component may also be referred to as a first component without departing from the scope of the technology to be described below. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

In terms of the terms used herein, the singular expression should be understood to include a plural expression unless the context clearly dictates otherwise, and terms such as "comprises" refer to the described feature, number, step, operation, and element. , parts or combinations thereof are to be understood, but not to exclude the possibility of the presence or addition of one or more other features or numbers, step operation components, parts or combinations thereof.

Prior to a detailed description of the drawings, it is intended to clarify that the classification of the constituent parts in the present specification is merely a division according to the main function that each constituent unit is responsible for. That is, two or more components to be described below may be combined into one component, or one component may be divided into two or more for each more subdivided function. In addition, each of the constituent units to be described below may additionally perform some or all of the functions of other constituent units in addition to the main function it is responsible for. Of course, it may be carried out by being dedicated to it.

In addition, in performing the method or the method of operation, each process constituting the method may occur differently from the specified order unless a specific order is clearly described in context. That is, each process may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

1 is a schematic diagram of an IoT control and sensing system according to an embodiment of the present invention.

1 , the IoT control and detection system 100 includes at least one IoT device 110 , a slave RS-485 communication module 120 , a server 130 , a master RS-485 communication module 140 , a user device 150 and/or a DDC (or DDC controller) 160 .

The Internet of Things (IoT) device 110 is an electronic device in which IoT technology is implemented, and refers to an electronic device capable of transmitting and receiving various information/data/signals by embedding a sensor and/or a communication function. For example, the IoT device 110 is a refrigerator, thermometer, lighting, air conditioner, thermometer, hygrometer, cleaner, washing machine, dehumidifier, dryer, speaker, microwave oven, gas stove, switchboard, distribution board, switchboard, TV, DVD, electricity It may correspond to a car, blind, CCTV, drone, PC, tablet PC, wearable device, boiler, air purifier, humidifier, camera, sensor, solar power plant, nuclear power plant and/or wind power plant.

The IoT device 110 may communicate with the outside based on various communication protocols. The IoT device 110 in the present specification may refer to a device that communicates using the RS-485 communication protocol, which is a wired communication protocol. have. Accordingly, the IoT device 110 may be equipped with a hardware communication circuit/device for using the RS-485 communication protocol, and various signals (eg, control/status signals, etc.) based on the RS-485 communication protocol. can be transmitted/received from the outside (in particular, the DDC 160 and/or the slave RS-485 communication module 120).

The IoT device 110 may receive a control signal from the user device 150 and operate according to the received control signal. For example, when the IoT device 110 is a light, the IoT device 110 may turn on/off the power according to a power ON/OFF control signal received from the user device 150 . Also, the IoT device 110 may transmit a status signal regarding the current status to the user device 150 . For example, when the IoT device 110 is a dryer, the IoT device 110 may transmit information about the remaining time until drying is completed to the user device 150 as a status signal. In order for the actual IoT device and the user device to communicate, at least one gateway/repeater (eg, master/slave RS-485 communication modules 120, 140, server 130, and/or DDC 160), etc. ), which will be described in more detail below.

The slave RS-485 communication module 120 is a communication module that performs the RS-485 communication protocol, and may serve as a gateway for signal transmission between the IoT device 110 and the server 130 . In particular, the slave RS-485 communication module 120 receives the status signal from the IoT device 110 and transmits it to the server 130 , and receives a control signal from the server 130 and transmits it to the IoT device 110 . have. In this case, the slave RS-485 communication module 120 may perform communication with the IoT device 110 based on an RS-485 communication protocol and a communication protocol different from that of the server 130 . Here, as another communication protocol, for example, Long-Term Evoluation (LTE), Wireless Fidelity (WiFi), etc. may be used, where LTE is a radio standardized in 3GPP such as 3G, 4G, 5G, LTE-A, NR, etc. All communication protocols can be collectively referred to.

The slave RS-485 communication module 120 may be provided in a form that is directly mounted/connected/assembled/installed as one component to the IoT device 110 , or may be provided as an independent device separated from the IoT device 110 . have. In the former case, the slave RS-485 communication module 120 may include a connection unit for mounting or connecting to the IoT device 110 , and in the latter case, the range in which RS-485 communication is possible from the IoT device 110 . It may be installed separately from the IoT device 110 within. However, in the latter case, it is assumed that the IoT device 110 and the slave RS-485 communication module 120 are installed in a sufficiently close location, since RS-485 communication must be installed within a possible range, and below for convenience of explanation The positions of the slave RS-485 communication module 120 and the IoT device 110 will be described as substantially the same. In this case, the slave RS-485 communication module 120 may transmit/receive signals to and from the plurality of IoT devices 110 . The master RS-485 communication module 140 is also a communication module that performs the RS-485 communication protocol. , it can serve as a gateway that transmits signals between the server and the DDC. In particular, the master RS-485 communication module 140 receives the status signal from the server 130 and transmits it to the user device 150 through/through the DDC 160 , and the DDC 160 from the user device 150 . The control signal may be received through/through and transmitted to the server 130 . At this time, the master RS-485 communication module 140 also performs communication based on a communication protocol different from that of the server 130, similar to the slave RS-485 communication module 120, based on the RS-485 communication protocol with the DDC. can do. Here, as another communication protocol, for example, Long-Term Evoluation (LTE), Wireless Fidelity (WiFi), etc. may be used, where LTE is a radio standardized in 3GPP such as 3G, 4G, 5G, LTE-A, NR, etc. All communication protocols can be collectively referred to.

The reason why the slave/master RS-485 communication modules 120 and 140 communicate with the IoT device 110/DDC 160 and the server 130 using different communication protocols is as follows. First, since many IoT devices 110 in the prior art perform communication based on the RS-485 communication protocol, this is to improve compatibility with the already installed IoT devices 110/system 100 . In this case, the effect of reducing the cost for system reconfiguration occurs. Second, when the IoT device 110 corresponds to an indoor facility/facility where it is impossible/difficult to install a separate wiring and communication cable, the user device is installed at a remote location from the indoor facility/equipment, so the introduction of a stable telecommunication protocol is required. do. Finally, when the IoT device 110 is installed in a government office, a public institution, or a government institution, a military institution that requires a high security level, the RS-485 communication protocol has weak security, so communication with a relatively high security level Introduction of the protocol is required. In this regard, the slave RS-485 communication module 120 has a high security level, and uses the LTE or WiFi communication protocol that provides long-distance communication distance and stable communication function, and the master RS-485 (wired connection with the user device) It may communicate with the communication module 140 .

To this end, the slave / master RS-485 communication module (120, 140) is a communication module insert that can be installed / installed by inserting the LTE or WiFi protocol module so that the LTE or WiFi communication protocol can also be additionally used. have. Therefore, the user can make the slave / master RS-485 communication module 120 proposed in this specification simply by inserting the LTE and / or WiFi communication module into the slave / master RS-485 communication module (120, 140). .

A correspondence/affiliation relationship of N:1 (N is a natural number) may be formed/set between the slave RS-485 communication module 120 and the master RS-485 communication module 140 . For example, at least one slave RS-485 communication module 120 belongs to one master RS-485 communication module 140 and a structure/relationship divided into one group may be preset. In this case, the server 130 may play a role of intermediately transmitting the status signal and the control signal to the corresponding slave and/or master RS-485 communication modules 120 and 140 based on this structure/relationship. . For example, the server 130, based on the structure set between the slave and master RS-485 communication modules 120 and 140, when transmitting the status signal, the slave RS-485 communication module 120 that transmits the status signal The status signal can be transmitted to the master RS-485 communication module 140 to which it belongs. Similarly, the server 130, based on the structure set between the slave and the master RS-485 communication module 120, 140, when transmitting the control signal, the master RS-485 communication module 140 that transmits the control signal A control signal may be transmitted to the slave RS-485 communication module 120 belonging to the . When there are a plurality of slave RS-485 communication modules 120 belonging to the corresponding master RS-485 communication module 140, the receiving target slave RS-485 communication module 120 is based on the receiving target information included in the control signal. ) can be specified to transmit a control signal.

The server 130 may transmit/receive a control signal for controlling the IoT device 110 , and may transmit/receive a status signal related to the state of the IoT device 110 . In more detail, the server 130 receives the status signal from the slave RS-485 communication module 120 to the slave RS-45 communication module 120 and the corresponding (belonging) master RS-485 communication module. A slave RS-485 communication module that transmits a status signal to 140, receives a control signal from the master RS-485 communication module 140, and corresponds to (belongs to) the master RS-485 communication module 140 A control signal may be transmitted to 120 . The server 130 may store and manage control and status signals received from the outside for each IoT device 110 that is a reception/transmission target.

The server 130, as an embodiment, may correspond to MQTT (MQ Telemetry Transport). MQTT is a lightweight messaging protocol for communication between sensor devices, embedded devices such as Raspberry Pi, and mobile devices. Based on TCP/IP, it is a protocol designed to operate in a low-bandwidth network.

The DDC 160 may be connected to the master RS-485 communication module 140 and the user device 150 by wire, and may transmit/receive a status signal and a control signal thereto. In particular, the DDC 160 receives the status signal from the master RS-485 communication module 140 in the form of an RS-485 communication signal, and converts it into a form of a signal recognizable by the user device 150 to the user device ( 150) can be transferred. Similarly, the DDC 160 may receive a control signal from the user device 150 , convert it into an RS-485 communication signal form, and transmit it to the master RS-485 communication module 140 . That is, the DDC 160 may serve as an intermediate bridge between the master RS-485 communication module 140 and the user device 150 .

The user device 150 corresponds to an electronic device that receives a control input for controlling the IoT device 110 from a user and provides state information of the IoT device 110 received from the IoT device 110 to the user. More specifically, the user device 150 may receive a control input for controlling the IoT device 110 from the user, generate a control signal including the control input, and transmit it to the server 130 . Also, the user device 150 may receive the status signal of the IoT device 110 from the server 130 and provide status information of the IoT device 110 included in the status signal to the user. In particular, the user device 150 may be an electronic device in which a specific application/program designed/developed to perform these functions is installed. Accordingly, the user can easily and simply monitor/manage/control the IoT device 110 through the user device 150 .

On the other hand, when the distance between the IoT device (in the case of this figure, the video device) and the user device 150 is close enough to use the RS-485 communication protocol, as shown in this figure, the It may be directly wired (via DDC 160). In this case, separate RS-485 communication modules 120 and 140 are not required, and the IoT device may directly communicate with the user device 150 through the DDC 160 . In this case, the IoT device and the DDC 160 perform communication based on the RS-485 communication protocol.

Therefore, the RS-485 communication module (120, 140) proposed in the present specification cuts off the wired connection between the DDC (160) and the IoT device in order to widen the range of the existing system capable of short-distance connection by wire as described above. It can be understood that the slave RS-485 communication module 120 , the server 130 , and the master RS-485 communication module 140 are introduced (ie, compatibility is maintained). Therefore, it is possible to introduce the present invention while fully reusing the RS-485 communication protocol-based system that has been previously installed in advance, thereby reducing costs due to deletion and reinstallation of the existing IoT device control and detection system.

2 is a diagram illustrating an RS-485 communication module using an LTE communication protocol according to an embodiment of the present invention.

Referring to FIG. 2 , when the user device and the IoT device are separated by more than a preset distance, the slave RS-485 communication module 120 , the server 130 and the master RS-485 communication module 140 may be installed/introduced. In this case, they may transmit and receive control and status signals by performing communication using LTE and/or WiFi communication protocols.

As described above, for the IoT device 220 installed in a place where it is impossible/difficult to install communication/wiring, etc. with high risk, such as solar power and nuclear power plants, lower the risk and facilitate the installation of communication/wiring, etc. For this purpose, the user device 210 may be installed in a place 210 that is remote from the IoT device 220 .

In addition, when the IoT device (or the slave RS-485 communication module 120) is installed in a government office, public institution, government institution or military institution that requires a high security level, the slave and master RS-485 communication module 120, 140) can perform communication using the LTE communication protocol (only) with a relatively high security level (than RS-485 communication protocol and WiFi communication protocol). In the case of WiFi communication protocol, there is no need to pay a separate data usage fee, so there is no big restriction on data usage. Therefore, when a high security level is not required and communication costs are to be reduced, the RS-485 communication modules 120 and 140 may communicate with the server 130 using a WiFi communication protocol.

That is, the RS-485 communication modules 120 and 140 may perform communication by selectively using any one of LTE and WiFi communication protocols. Which protocol will be used may be determined according to which communication module the user has installed in the RS-485 communication module 120, 140 and/or whether specific conditions are satisfied.

In the former case, the user can directly apply which communication module in consideration of the place where the RS-485 communication modules 120 and 140 will be installed, the type of IoT device, the place where the IoT device is installed, and the distance between the IoT device and the server. is determined, and the determined communication module can be directly inserted/mounted/installed in the RS-485 communication module (120, 140). In this case, the RS-485 communication modules 120 and 140 communicate with the server using only the communication protocol of the inserted/mounted/installed communication module.

In the latter case, the user can insert/install/install both communication modules in the RS-485 communication modules 120 and 140 . In this case, the RS-485 communication modules 120 and 140 can selectively activate only one of the communication modules by determining whether a preset communication module activation condition is satisfied. For example, the RS-485 communication modules 120 and 140 can perform test communication with the server using both WiFi and LTE communication protocols (using dummy/test signals), You can select a communication protocol. Similarly, the RS-485 communication modules 120 and 140 may receive information about the type of IoT device, the place where the IoT device is installed, the distance between the IoT device and the user device, etc., and select an appropriate communication protocol based on this. have.

3 is a diagram illustrating an RS-485 communication module performing a function as a relay node according to an embodiment of the present invention.

Referring to FIG. 3 , the slave RS-485 communication module 120 may also perform a function/role as a relay node.

More specifically, a plurality of slave RS-485 communication modules 120-1 to 120-5 are installed in a short distance to each other, and the user device (or RS-485 communication module 140) is a plurality of slave RS -485 communication modules (120-1 ~ 120-5) when installed at a remote location, one of the plurality of slave RS-485 communication modules (120-1 ~ 120-5) communication module (120-5) The remaining communication modules 120-1 to 120-4 except for may perform a relay node function based on the WiFi communication protocol. The excluded one communication module 120 - 5 may perform a gateway function based on the LTE communication protocol in order to communicate with the remote user device (or the RS-485 communication module 140 ).

For example, when the first to fifth slave RS-485 communication modules 120-1 to 120-5 are respectively disposed on the first to fifth floors in the five-story building 410, the first to fourth slaves The RS-485 communication modules 120-1 to 120-4 may perform a relay node function, and the fifth slave RS-485 communication module 120-5 may perform a gateway function. In this case, the signal transmitted by the IoT device to the server 130 is the first RS-485 communication module 120-1 → the second RS-485 communication module 120-2 → the third RS-485 communication module 120 -3) → the fourth RS-485 communication module (120-4) → the fifth RS-485 communication module (120-5) can be transmitted / transmitted in the order, and the signal transmitted from the server 130 to the IoT device may be transmitted/delivered in the reverse order. The signal transmission/transmission sequence is preset by the user, or each slave RS-485 communication module 120 is based on its location, the distance from other RS-485 communication modules 120 and/or gateways, etc. ( real-time) can be directly determined/set.

If the distance between the first to fourth slave RS-485 communication modules 120-1 to 120-4 and the fifth slave RS-485 communication module 120-5 is close enough to use the WiFi communication protocol, , each of the communication modules 120-1 to 120-4 may directly transmit a signal to the fifth RS-485 communication module 120-5 without going through a relay node.

The reason for performing the function as a relay node in this way is, as described above, in the case of the LTE communication protocol, long-distance communication is possible, but a separate data usage fee must be paid, whereas in the case of the WiFi communication protocol, it is necessary to pay a separate data usage fee This is because there is no communication cost. In addition, from the standpoint of the LTE base station, it is because there is an effect that beamforming technology is more advantageous for a signal transmitted in one constant direction than a signal transmitted in multiple directions simultaneously. Therefore, as in the above embodiment, by designating the slave RS-485 communication module 120 using the LTE communication protocol to the minimum possible number and allowing the remaining RS-485 communication modules 120 to use the WiFi communication protocol, communication It can reduce costs and improve communication quality.

4 is a diagram illustrating a user device providing state information of an IoT device according to an embodiment of the present invention.

Referring to FIG. 4 , the user device 510 may provide the user with status information of the IoT device included in the received status signal. In particular, when the user device 510 and the server receive an abnormal state signal informing of a dangerous state or operation abnormality of the IoT device, the user device 510 and the server may notify the user by processing it as the highest priority.

For example, when receiving the abnormal state signal, the server may process/transmit the abnormal state signal prior to processing/transmission of other previously received control/status signals. In this case, the abnormal state signal may be transmitted using an emergency message transmission service predefined in the LTE communication protocol. In this case, the user device 510 may output various visual 520 and/or audible notifications for notifying the abnormal state of the IoT device.

According to the above-described embodiment, the user can monitor information about the status abnormality of the IoT device in real time, so that not only can a safety accident be prevented in advance, but also a problem situation can be dealt with more quickly.

5 is a diagram illustrating an embodiment in which an IoT device is integrated into an IoT control and detection system according to an embodiment of the present invention.

In the case of the conventional IoT device 620 that performs communication using the RS-485 communication protocol, the slave RS-485 communication module of the present invention is inserted/mounted to simply insert the pre-created IoT control and detection system 610 into the IoT device 620 . Can be integrated/added. To this end, the slave RS-485 communication module may be provided with a connection unit for mounting or connecting to the IoT device 620 , and replaces or additionally installs/replaces the communication module installed in the IoT device 620 . can be installed.

The IoT device 620 newly equipped with the slave RS-485 communication module may transmit/receive signals to and from the server of the pre-created IoT control and detection system 610 . The server may deliver the signal received from the newly added IoT device 620 to the master RS-485 communication module included in the corresponding IoT control and detection system 610 (or generalize/control it). The user can simply add the new IoT device 620 to the server (or the IoT device control and detection system 610 ) by registering the corresponding IoT device 620 with the server through the user device. Furthermore, the user may directly designate a master-slave RS-485 communication module to control the corresponding IoT device 620 through the user device.

According to the above-described embodiment, since the slave RS-485 communication module is compatible with the conventional IoT device 620 , it is costly to configure the IoT control and detection system 610 including the conventional IoT device 620 . It costs less, and there is an effect of increasing the flexibility of the system configuration.

6 is a block diagram of a server, an RS-485 communication module, and a user device according to an embodiment of the present invention.

Components to be described below may include at least one hardware/software configuration/device/circuit for performing each function, and may be configured as one element or integrated/separated into a plurality of elements.

The server, the RS-485 communication module, and the user equipment may include a control unit, a memory unit and a communication unit shown in FIG. 7 in common.

The control unit 710 includes at least one CPU (Central Processing Unit), MPU (Micro Processor Unit), MCU (Micro Controller Unit), AP (Application Processor), or any type of processor well known in the art. may be included. The control unit 710 may perform an operation on at least one application or program in order to execute embodiments of the present invention. In addition, the control unit 710 may control other constituent units and manage data transmission/reception between the units in order to implement embodiments of the present invention.

The memory unit 720 may store various digital data such as video, audio, photo, moving picture, and application. The memory unit 720 represents various digital data storage spaces, such as a flash memory, a hard disk drive (HDD), and a solid state drive (SSD).

The communication unit 730 may transmit/receive data by performing communication with the outside and at least one communication protocol (eg, RS-485 RS-485 communication protocol, WiFi communication protocol, LTE communication protocol, etc.) have. In particular, the communication unit 730 included in the IoT device uses the RS-485 communication protocol, and the communication unit 730 included in the server and the RS-485 communication module uses the RS-485 communication protocol, the WiFi communication protocol, and the LTE communication protocol. Each can be used for communication.

In addition, although not shown in this figure, the user device may further include a display/audio unit for providing a visual/auditory notification to the user. The display unit may display various images/videos/information under the control of the control unit 710 , and the audio unit may output various music/sounds under the control of the control unit 710 .

Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof. In the case of implementation by hardware, an embodiment of the present invention provides one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), FPGAs ( field programmable gate arrays), a processor, a controller, a microcontroller, a microprocessor, and the like.

In addition, in the case of implementation by firmware or software, an embodiment of the present invention is implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above, and is stored in a recording medium readable through various computer means. can be recorded. Here, the recording medium may include a program command, a data file, a data structure, etc. alone or in combination. The program instructions recorded on the recording medium may be specially designed and configured for the present invention, or may be known and available to those skilled in the art of computer software. For example, the recording medium includes a magnetic medium such as a hard disk, a floppy disk, and a magnetic tape, an optical recording medium such as a compact disk read only memory (CD-ROM), a digital video disk (DVD), and a floppy disk. magneto-optical media, such as a disk, and hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions may include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. Such hardware devices may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

In addition, the device or terminal according to the present invention may be driven by a command that causes one or more processors to perform the functions and processes described above. For example, such instructions may include interpreted instructions, such as script instructions, such as JavaScript or ECMAScript instructions, or executable code or other instructions stored on a computer-readable medium. Furthermore, the device according to the present invention may be implemented in a distributed manner over a network, such as a server farm, or may be implemented in a single computer device.

Furthermore, a computer program (also known as a program, software, software application, script or code) mounted on the device according to the invention and executing the method according to the invention includes compiled or interpreted language or a priori or procedural language. It can be written in any form of programming language, and can be deployed in any form, including stand-alone programs, modules, components, subroutines, or other units suitable for use in a computer environment. A computer program does not necessarily correspond to a file in a file system. A program may be in a single file provided to the requested program, or in multiple interacting files (eg, files that store one or more modules, subprograms, or portions of code), or portions of files that hold other programs or data. (eg, one or more scripts stored within a markup language document). The computer program may be deployed to be executed on a single computer or multiple computers located at one site or distributed over a plurality of sites and interconnected by a communication network.

Although each drawing has been described separately for convenience of description, it is also possible to design to implement a new embodiment by merging the embodiments described in each drawing. In addition, the present invention is not limited to the configuration and method of the embodiments described as described above, but the above-described embodiments are configured by selectively combining all or part of each embodiment so that various modifications can be made. could be

In addition, although preferred embodiments have been illustrated and described above, the present specification is not limited to the specific embodiments described above, and those of ordinary skill in the art to which the specification pertains without departing from the gist of the claims Various modifications are possible by the person, of course, these modifications should not be individually understood from the technical spirit or perspective of the present specification.

710: control unit
720: memory unit
730: communication unit

Claims (5)

In the IoT (Internet of Things) device control and detection system,
IoT devices;
Receives a control input for controlling the IoT device, generates and transmits a control signal including the control input, receives a status signal related to the status of the IoT device, and controls the IoT device included in the status signal. a user device that provides status information;
a slave RS-485 communication module that receives the status signal from the IoT device and transmits it to a server, and receives the control signal from the server and transmits it to the IoT device;
A master RS-485 communication module that receives the control signal from the user device through a direct digital controller (DDC) and transmits it to the server, receives the status signal from the server and transmits it to the user device through the DDC ; and
Receives the status signal from the slave RS-485 communication module, transmits the status signal to the master RS-485 communication module corresponding to the slave RS-485 communication module, and receives the control signal from the master RS-485 communication module a server for receiving and transmitting the control signal to a slave RS-485 communication module corresponding to the master RS-485 communication module; including,
The slave and master RS-485 communication modules are:
A first communication module for using the first communication protocol, and a second communication module for using the second communication protocol is inserted into the communication module insertion unit can be mounted; includes,
Performing communication with the server by selectively activating a communication protocol in which the signal strength is measured to be higher as a result of performing test communication with the server using the first and second communication protocols,
Perform communication with the IoT device or the DDC based on the RS-485 communication protocol,
The first communication protocol is Wi-Fi (Wireless Fidelity), the second communication protocol is LTE (Long-Term Evoluation),
When a plurality of slave RS-485 communication modules are included in the IoT device control and detection system:
Among the plurality of slave RS-485 communication modules, one of the first slave RS-485 communication modules is set as a gateway node, and the remaining slave RS-485 communication modules are set as relay nodes,
A signal transmission order between the relay nodes is determined based on at least one of a distance to another relay node and a distance to the gateway node,
The gateway node communicates with the server using only the second communication protocol, and the relay node communicates only with nodes assigned to the next order according to the determined signal transmission order, but uses only the first communication protocol to communicate,
A beamforming technology is applied to a signal transmitted and received through the second communication protocol between the gateway node and the server,
When the server receives an abnormal state signal indicating that the IoT device is in a dangerous state or abnormal operation from the IoT device, it transmits the abnormal state signal to the user device with the highest priority using only the second communication protocol. , transmitting the abnormal state signal using an emergency message transmission service predefined in the second communication protocol,
The slave RS-485 communication module includes a connection part for mounting or connection to the IoT device, and the slave RS-485 communication module is connected to the IoT device unregistered in the IoT device control and detection system through the connection part. When a module is installed in place of or in addition to:
The slave RS-485 communication module transmits a signal for registering the unregistered IoT device to the server,
The server transmits the signal transmitted from the unregistered IoT device to the master RS-485 communication module,
The master RS-485 communication module transmits a signal transmitted from the unregistered IoT device to the user device through the DDC,
The user device integrates the unregistered IoT device into the IoT device control and detection system by registering the unregistered IoT device,
The IoT device is:
a communication unit for performing communication based on the RS-485 communication protocol;
a memory unit for storing digital data; and
a control unit that controls the communication unit and the memory unit;
Refrigerator, thermometer, lighting, air conditioner, thermometer, hygrometer, vacuum cleaner, washing machine, dehumidifier, dryer, speaker, microwave oven, gas stove, switchboard, switchboard, switchboard, TV, DVD, electric vehicle, blind, CCTV, drone, PC, tablet IoT device control and detection system, corresponding to PC, wearable device, boiler, air purifier, humidifier, camera, sensor, solar power plant, nuclear power plant and/or wind power plant. The method of claim 1,
If the structure to which at least one slave RS-485 communication module belongs is set for one master RS-485 communication module,
The server transmits the status signal and the control signal to a corresponding slave and/or master RS-485 communication module based on the structure, an IoT device control and detection system. 3. The method of claim 2,
The server based on the structure,
When the status signal is transmitted, the status signal is transmitted to the master RS-485 communication module to which the slave RS-485 communication module that transmitted the status signal belongs,
An IoT device control and detection system that transmits the control signal to a slave RS-485 communication module belonging to a master RS-485 communication module that has transmitted the control signal when the control signal is transmitted. The method of claim 1,
If the slave RS-485 communication module is a device installed in a government office, public institution, government institution or military institution,
The slave RS-485 communication module performs communication using only the server and the second communication protocol, an IoT device control and detection system. The method of claim 1,
The user device is
When the abnormal state signal is received, an IoT device control and detection system for outputting a visual and/or audible notification for notifying the abnormal state.

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