KR102562666B1 - The LED Lighting Apparatus With Prediction Conservation Function - Google Patents

Abstract

The present invention is a predictive maintenance method performed in an LED lighting device, and more specifically, a controller provided inside the LED lighting device measures the current, power factor, and temperature of the corresponding LED lighting device, and the failure of only the corresponding LED lighting device. Prediction performed by the LED lighting device, which can know the risk of failure of the corresponding LED lighting device in advance by setting the reference temperature according to the risk and calculating the failure prediction score according to the criteria corresponding to each of the current, power factor, and temperature conservation method.

Description

LED Lighting Apparatus With Prediction Conservation Function {The LED Lighting Apparatus With Prediction Conservation Function}

The present invention is an LED lighting device having a predictive maintenance function, and more specifically, a controller provided inside the LED lighting device measures the current, power factor, and temperature of the corresponding LED lighting device, and the failure of only the corresponding LED lighting device. Predictive maintenance with a predictive correction function to know the risk of failure of the LED lighting device in advance by setting the reference temperature according to the risk and calculating the failure prediction score according to the criteria corresponding to each of the current, power factor, and temperature LED lighting device with functions.

In the past, sodium and metal halide discharge lamps and fluorescent lamps were mainly used for lighting devices, but as technology develops, LED lamps with longer lifespan, brighter brightness, and better power efficiency are gradually converted to LED lamps compared to conventional discharge lamps and fluorescent lamps. trend to become According to the data announced by the Ministry of Environment, the size of the domestic LED lighting market and procurement LED lighting market has been rapidly increasing since 2011, and the size of the domestic LED lighting market in 2019 is KRW 2.989 trillion, is an enormous scale as it amounts to 831.6 billion won.

In addition, with the rapid development of IoT technology including mobile communication technology, remote control and remote management by the control server have become possible without the manager visiting the site, and even if a malfunction report is not received, any of the lighting devices managed It is now possible to determine whether a lighting device has a problem in the control room where the control server is located.

As above, the conventional technology that can remotely manage them using wireless Internet technology when a problem occurs with the lighting device is a security light controller for smart public lighting and a remote control system including the same, as in Korean Patent Registration No. 10-2433956. etc.

However, such conventional technologies have a problem in that only when a problem occurs, it is possible to remotely determine whether or not a problem occurs, and a problem may occur in the corresponding lighting device, that is, predictive maintenance cannot be performed. In addition, when a malfunction occurs, in order to replace the malfunctioning part of the lighting device, it is necessary to know the information of the lighting device and the manufacturer information to proceed with the repair. There is a problem to go to the place and check. In particular, considering the feature of being installed at a high location with a wide interval, such as a lighting device installed outdoors such as on a road or in a residential area, a lot of time and expense may be consumed for the manager to go to the installation location every time as described above. Therefore, there is a need for a technology capable of grasping the information of the lighting device when a failure of the lighting device occurs, even if the manager does not go up to the installed location every time.

Republic of Korea Patent No. 10-2433956 (2022.08.19.)

The present invention is a predictive maintenance method performed in an LED lighting device, and more specifically, a controller provided inside the LED lighting device measures the current, power factor, and temperature of the corresponding LED lighting device, and the failure of only the corresponding LED lighting device. Prediction performed by the LED lighting device, which can know the risk of failure of the corresponding LED lighting device in advance by setting the reference temperature according to the risk and calculating the failure prediction score according to the criteria corresponding to each of the current, power factor, and temperature It aims to provide a preservation method.

In order to solve the above problems, an embodiment of the present invention is a predictive maintenance method performed in an LED lighting device, wherein the LED lighting device includes a controller; and a lighting unit, wherein the predictive maintenance method includes: a current measuring step of measuring a current input from the controller to the lighting unit; a power factor measurement step of measuring a power factor of power input from the controller to the lighting unit; a temperature measurement step of measuring the temperature of the lighting unit; At each predetermined cycle, it is determined whether the current, power factor, and temperature measured in the current measurement step, the power factor measurement step, and the temperature measurement step each reach their respective risk levels, and based on whether they have reached and the number of times, the corresponding LED lighting a failure predictive score calculation step of calculating a failure predictive score indicating a failure risk of the device; and a failure risk transmission step of transmitting the failure prognosis points to a manager terminal when the failure prognosis points accumulated during a predetermined period are calculated to be equal to or greater than a predetermined reference score, or upon request from the manager terminal. provides a way

In one embodiment of the present invention, the predictive maintenance method further includes a reference temperature setting step of setting a reference temperature only for the corresponding LED lighting device with respect to the temperature measured in the temperature measuring step, wherein the reference temperature setting step , When the current and power factor of the LED lighting device measured at each predetermined cycle reach the dangerous level at the same time, the average temperature of the lighting unit during the period reached at the same time is calculated, and the calculated average temperature is It can be set as a reference temperature.

In one embodiment of the present invention, in the step of calculating the number of probable failure points, it is determined that a dangerous level has been reached when the current measured in the current measuring step is out of a reference range having a range of 5% based on a preset reference current value. And, if the power factor measured in the power factor measuring step is less than the preset reference power factor value, it is determined that the dangerous level has been reached, and if the temperature measured in the temperature measuring step exceeds the reference temperature, it is determined that the dangerous level has been reached, and the current Whenever each of , power factor, and temperature reaches a dangerous level, the failure prediction score of the corresponding LED lighting device may be added.

In one embodiment of the present invention, in the step of calculating the number of failure points, when one of current, power factor, and temperature reaches a dangerous level at a specific time, the failure point is added by a first point, and the current at a specific time If two elements among , power factor and temperature reach the dangerous level at the same time, the failure prediction score is added by the 2nd score for each element, and if three of the current, power factor and temperature elements reach the dangerous level at the same time at a specific time A failure prognosis score may be added by a third score for each element, the second score may be greater than the first score, and the third score may be greater than the second score.

In one embodiment of the present invention, the predictive maintenance method further includes a device information transmission step, wherein the device information transmission step includes: receiving a communication request command from a manager terminal to a corresponding LED lighting device; Confirming whether the manager terminal sending the communication request command is an approved manager terminal; and, in the case of an approved manager terminal, transmitting device information of the corresponding LED lighting device to the manager terminal, wherein the device information of the LED lighting device includes: device information of the LED lighting device; manufacturer information; temperature, power factor, and current profiles; when to install; usage time; And A / S management history; may include.

In order to solve the above problems, one embodiment of the present invention is an LED lighting device including a predictive maintenance function, wherein the LED lighting device includes a controller; and a lighting unit, wherein the controller includes: a current measuring unit measuring a current input to the lighting unit; a power factor measurement unit for measuring a power factor of power input to the lighting unit; a temperature measurement unit for measuring the temperature of the lighting unit; At each predetermined period, it is determined whether the current, power factor, and temperature measured by the current measurement unit, the power factor measurement unit, and the temperature measurement unit each reach their respective risk levels, and based on whether or not they have reached and the number of times, the corresponding LED lighting a failure prediction score calculation unit that calculates a failure prediction score indicating a failure risk of the device; and a failure risk transmission unit configured to transmit the failure prognosis points to the manager terminal when the failure prediction points accumulated during a predetermined period are calculated to be equal to or greater than a predetermined reference score, or upon request from the manager terminal. It provides an LED lighting device comprising a.

According to an embodiment of the present invention, by calculating the number of failure prognostic points, it is possible to know in advance the possibility of a failure before a failure of the LED lighting device occurs, and through this, safety that may occur due to a failure of the lighting device It can exert an effect that can prevent an accident in advance.

According to one embodiment of the present invention, by calculating the number of failure prediction points considering a plurality of factors measured in the LED lighting device, it is possible to exert an effect of performing more accurate predictive maintenance.

According to one embodiment of the present invention, even if the manager of the LED lighting device does not climb directly onto the LED lighting device, it is possible to receive the information of the corresponding LED lighting device to the manager terminal using a wireless communication network, and through this, the maintenance of the LED lighting device And it can exert the effect of reducing the cost consumed for maintenance.

According to an embodiment of the present invention, it is possible to individually set the reference temperature for predicting the risk of failure of the LED lighting device, thereby exhibiting the effect of performing predictive maintenance in consideration of the elements provided in the LED lighting device and the environment in which they are installed. can

According to an embodiment of the present invention, the LED lighting device can exert an effect of performing short-range wireless communication capable of transmitting information even with low power by performing communication with a manager terminal in a BLE and UWB manner.

1 schematically shows the configuration of a predictive maintenance device provided in an LED lighting device according to an embodiment of the present invention.
2 schematically illustrates a configuration in which an LED lighting device and a manager terminal are connected according to an embodiment of the present invention.
FIG. 3 schematically illustrates the steps of calculating the number of possible failure points according to an embodiment of the present invention.
4 schematically illustrates a process of performing a reference temperature setting step according to an embodiment of the present invention.
5 schematically shows a derating curve for an LED module according to an embodiment of the present invention.
6 schematically illustrates a process of calculating the number of probable failure points according to an embodiment of the present invention.
7 schematically shows a table for calculating the number of prognostic points according to an embodiment of the present invention.
8 schematically illustrates the steps performed in the device information transmission step according to an embodiment of the present invention.
9 schematically shows a flowchart of a predictive maintenance method performed in an LED lighting device according to an embodiment of the present invention.

In the following, various embodiments and/or aspects are disclosed with reference now to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth in order to facilitate a general understanding of one or more aspects. However, it will also be appreciated by those skilled in the art that such aspect(s) may be practiced without these specific details. The following description and accompanying drawings describe in detail certain illustrative aspects of one or more aspects. However, these aspects are exemplary and some of the various methods in principle of the various aspects may be used, and the described descriptions are intended to include all such aspects and their equivalents.

Moreover, various aspects and features will be presented by a system that may include a number of devices, components and/or modules, and the like. It should also be noted that various systems may include additional devices, components and/or modules, and/or may not include all of the devices, components, modules, etc. discussed in connection with the figures. It must be understood and recognized.

"Example", "example", "aspect", "exemplary", etc., used herein should not be construed as preferring or advantageous to any aspect or design being described over other aspects or designs. . The terms '~unit', 'component', 'module', 'system', 'interface', etc. used below generally mean a computer-related entity, and for example, hardware, hardware It may mean a combination of and software, software.

Also, the terms "comprises" and/or "comprising" mean that the feature and/or element is present, but excludes the presence or addition of one or more other features, elements and/or groups thereof. It should be understood that it does not.

In addition, terms including ordinal numbers, such as first and second, may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. The terms and/or include any combination of a plurality of related recited items or any of a plurality of related recited items.

In addition, in the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, are generally understood by those of ordinary skill in the art to which the present invention belongs. has the same meaning as Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the embodiments of the present invention, an ideal or excessively formal meaning not be interpreted as

"User terminal" and "manager terminal" referred to below may be implemented as a computer or portable terminal capable of accessing a server or other terminals through a network, unless otherwise specified. Here, the computer includes, for example, a laptop, desktop, laptop, etc. equipped with a web browser, and the portable terminal is, for example, a wireless communication device that ensures portability and mobility. , Smartphone, PCS(Personal Communication System), GSM(Global System for Mobile communications), PDC(Personal Digital Cellular), PHS(Personal Handyphone System), PDA(Personal Digital Assistant), IMT(International Mobile Telecommunication)-2000, All kinds of wearable devices such as CDMA (Code Division Multiple Access)-2000, W-CDMA (W-Code Division Multiple Access), Wibro (Wireless Broadband Internet) devices that can collect biometric information of terminals and clients, etc. It may include a handheld-based wireless communication device.

In addition, the "LED lighting device" referred to below will be described based on being used as a street light or security light, but is not limited thereto, and various types of lighting devices using LEDs may be used as an embodiment of the present invention.

1 schematically shows the configuration of a predictive maintenance device provided in an LED lighting device according to an embodiment of the present invention.

As shown in FIG. 1, as a predictive maintenance device provided in an LED lighting device, an LED lighting device including a predictive maintenance function, the LED lighting device including a controller 100; and a lighting unit 200; and the controller 100 includes a current measuring unit 121 measuring a current input to the lighting unit 200; a power factor measurement unit 122 for measuring a power factor of power input to the lighting unit 200; a temperature measurement unit 140 for measuring the temperature of the lighting unit; At each predetermined period, it is determined whether the current, power factor, and temperature measured by the current measurement unit 121, the power factor measurement unit 122, and the temperature measurement unit 140 each reach their respective risk levels, and Failure prediction score calculation unit 131 for calculating a failure prediction score indicating the risk of failure of the LED lighting device based on whether or not and the number of times; and a failure risk transmission unit 151 for transmitting the failure prognosis points to the manager terminal when the failure prognosis points accumulated during a predetermined period are calculated to be equal to or greater than a predetermined reference score, or upon request from the manager terminal.

Specifically, the LED lighting device in which the predictive maintenance method of the present invention is performed is largely composed of a controller 100 and a lighting unit 200. The controller 100 diagnoses the state of the street light and controls the operation, and the lighting unit 200 can turn on or turn off the light according to the control of the controller 100 .

More specifically, the controller 100 includes a power supply unit 110 into which external power is input; a current measurement unit 121 sensing a current output from the power supply unit 110 and introduced into the lighting unit 200 and a power factor measurement unit 122 sensing a power factor of power; Control unit 130 for controlling the operation of the corresponding LED lighting device; a temperature measurement unit 140 for measuring the temperature of the lighting unit 200 at all times; and a wireless communication unit 150 that performs wireless communication with an external control server, user terminal or manager terminal, and although not shown in FIG. 1, the controller 100 has a power storage unit capable of storing predetermined power. (not shown); and a data storage unit (not shown) capable of storing data. In addition, the lighting unit 200 includes an SMPS 210 that receives power output from the controller 100; and an LED module 220 including a plurality of LED elements receiving power from the SMPS 210 and emitting light.

Meanwhile, in the configuration of the controller 100 shown in FIG. 1, a solid line means movement of power, and a dotted line means movement of data. In addition, although solid lines are not shown to transfer power between the control unit 130, the temperature measurement unit 140, and the wireless communication unit 150 to the power supply unit 110, in the present invention, the control unit 130 , The power supply line for supplying power to the temperature measuring unit 140 and the wireless communication unit 150 is connected to the power supply unit 110 .

The power supply unit 110 includes a plurality of electric/electronic devices and modules including an AC/DC conversion module and a switching module. When AC power is input to the power supply unit 110, it is converted into DC power by the AC/DC conversion module of the power supply unit 110, and the converted DC power is sent to the current measurement unit 121 and the power factor measurement unit 122. It is passed on. At this time, the amount of power delivered to the current measurement unit 121 and the power factor measurement unit 122 may be adjusted by the switching module. The power storage unit is connected to the power supply unit 110 to store power that can be used to drive the corresponding LED lighting device.

The current measurement unit 121 and the power factor measurement unit 122 measure the current and power factor of the power output from the power supply unit 110 . Although the current measurement unit 121 and the power factor measurement unit 122 are shown separately in FIG. 1 for explanation, they may actually be configured as one module 120 in the present invention. The current measurement unit 121 performs a current measurement step of measuring a current input from the controller 100 to the lighting unit 200, and the power factor measurement unit 122 measures the current input from the controller 100 to the lighting unit ( 200) performs a power factor measurement step of measuring the power factor of the input power. According to an embodiment of the present invention, the current measurement unit 121 and the power factor measurement unit 122 measure the current and power factor at each predetermined period, and transmit the measured values to the control unit 130, The controller 130 may generate a current profile over time and a power factor profile over time. On the other hand, according to another embodiment of the present invention, the current measuring unit 121 and the power factor measuring unit 122 based on the current and power factor measured by the current measuring unit 121 and the power factor measuring unit 122 Each may generate a current profile according to time and a power factor profile according to time, and transmit the generated profile to the control unit 130 .

The controller 130 includes one or more memories and one or more processors, and controls all components included in the controller 100 . For example, a switching module included in the power supply unit 110 may be controlled, or a current measurement period of the current measurement unit 121 may be controlled. The control unit 130 includes a failure prediction point calculation unit 131 and a reference temperature setting unit 132. The failure prognosis point calculation unit 131 determines whether each of the current, power factor, and temperature measured in the current measurement step, the power factor measurement step, and the temperature measurement step reaches each risk level at each predetermined cycle, , a failure prediction point calculation step of calculating a failure prediction point indicating the failure risk of the corresponding LED lighting device based on whether or not the LED lighting device has reached and the number of times is performed.

In addition, the reference temperature setting unit 132, when the current and power factor of the LED lighting device measured at each predetermined period reach the dangerous level at the same time, the average temperature of the lighting unit 200 during the period reached at the same time Calculate and perform a reference temperature setting step of setting the calculated average temperature as the reference temperature only for the corresponding LED lighting device. The data storage unit is connected to the controller 130 and stores a plurality of data input to the controller 130 .

The temperature measurement unit 140 is connected to a temperature sensor and performs a temperature measurement step of measuring the temperature of the lighting unit 200 through the temperature sensor. The temperature sensor is preferably located outside the controller 100, and more preferably located where the temperature of the lighting unit 200 can be accurately sensed directly or indirectly.

According to an embodiment of the present invention, the temperature measuring unit 140 measures the temperature at each predetermined period, and transmits the measured temperature value to the controller 130, so that the controller 130 can measure the temperature over time. A temperature profile can be created. Meanwhile, according to another embodiment of the present invention, based on the temperature measured by the temperature sensor, the temperature measurement unit 140 generates a temperature profile according to time, and sends the generated profile to the control unit 130. can be conveyed

The wireless communication unit 150 performs wireless communication with a user terminal or manager terminal outside the LED lighting device, and includes a wireless communication module for wireless communication with the manager terminal. The wireless communication unit 150 includes a failure risk transmission unit 151 and a device information transmission unit 152. On the other hand, as an embodiment of the present invention, the wireless communication unit 150 is an external control server; Alternatively, a communication module capable of communicating with a gateway capable of communicating with the control server may be further included.

The failure risk transmission unit 151 transmits the failure prediction score to the manager terminal when the failure prediction score accumulated during a predetermined period is calculated to be equal to or greater than a predetermined reference score, or upon request from the manager terminal. do the steps In addition, the device information transmission unit 152 receives a connection command to the corresponding LED lighting device from the manager terminal; Confirming whether the manager terminal sending the connection command is an approved manager terminal; and, in case of an approved manager terminal, transmitting device information of the corresponding LED lighting device to the manager terminal.

The SMPS 210 includes a power factor correction circuit for compensating the power factor of the power input from the current measurement unit 121 and the power factor measurement unit 122, and the power that has passed through the power factor correction circuit is converted into the LED module 220 ) is forwarded to The LED module 220 is composed of a plurality of LED elements, and the number of the LED elements may vary depending on the place and environment where the corresponding LED lighting device is installed.

2 schematically illustrates a configuration in which an LED lighting device and a manager terminal are connected according to an embodiment of the present invention.

Specifically, the LED lighting device may perform wireless communication with a manager terminal using a wireless communication network. The manager terminal corresponds to a terminal of a manager who manages the corresponding LED lighting device. The manager may check the state of the corresponding LED lighting device through the manager terminal, and take actions corresponding to the state. More specifically, the manager terminal may transmit a communication request command to the LED lighting device after being located near the LED lighting device, and when the communication request command is approved by the LED lighting device, as shown in FIG. 2, the LED lighting The device and the manager terminal may perform wireless communication with each other. A more detailed description of this will be described later in the description of FIG. 8 .

According to an embodiment of the present invention, the LED lighting device and the manager terminal preferably perform wireless communication of the UWB (Ultra Wide Band) and BLE (Bluetooth Low Energy) method through the wireless communication network, the present invention According to another embodiment, wireless communication may also be performed using a wireless LAN (Wi-Fi) or low power wide area (LPWA) method. Referring to FIG. 1, the wireless communication unit 150 of the present invention can perform short-range wireless communication capable of transmitting information with low power by performing communication using BLE and UWB methods, and using UWB positioning technology By doing so, it is possible to grasp the exact location of the LED lighting device, which can have the effect of resolving the maintenance blind spot. Meanwhile, according to an embodiment of the present invention, the accurate location of the corresponding LED lighting device can be found by using the GPS module (not shown) built in the controller 100 and the UWB positioning technology together.

Meanwhile, the UWB communication preferably uses a frequency of 3.1 to 10.6 GHz band, the BLE communication preferably uses a frequency of 2.4 GHz band, and the wireless LAN communication preferably uses a frequency of 5 GHz band do.

FIG. 3 schematically illustrates the steps of calculating the number of possible failure points according to an embodiment of the present invention.

As shown in FIG. 3, in the predictive maintenance method performed in the LED lighting device of the present invention, the current, power factor, and temperature measured in the current measuring step, the power factor measuring step, and the temperature measuring step at each predetermined period. A failure prognosis score calculation step of determining whether each reaches each risk level and calculating a failure prognosis score indicating the failure risk of the corresponding LED lighting device based on whether or not it has reached and the number of times it has reached it,

In the step of calculating the prognostic point of failure, when the current measured in the current measurement step is out of the reference range having a range of 5% based on the preset reference current value, it is determined that a dangerous level has been reached, and the measurement is performed in the power factor measurement step. If the measured power factor is less than the preset reference power factor value, it is determined that the danger level has been reached, and if the temperature measured in the temperature measurement step exceeds the reference temperature, it is determined that the danger level has been reached, and each of the current, power factor, and temperature is a danger level Each time it reaches , the failure prediction score of the corresponding LED lighting device is added.

Specifically, the failure prognostic point calculation unit 131, with reference to FIG. A current profile, a power factor profile, and a temperature profile generated based thereon are received. The current profile, power factor profile, and temperature profile correspond to profiles over time, and according to an embodiment of the present invention, the predictive failure point calculation unit 131 converts the current profile, power factor profile, and temperature profile into an image. It can be input in the form and the failure prediction score can be calculated. Meanwhile, according to another embodiment of the present invention, the number of prognostic points may be calculated by receiving an input in the form of a data table corresponding to the current profile, power factor profile, and temperature profile.

The failure prediction point calculation unit 131 sets a checkpoint at each predetermined period (refer to FIG. 6). Each checkpoint is time-synchronized with each of the current, power factor, and temperature profiles. In other words, points in the current, power factor, and temperature profiles corresponding to one checkpoint all correspond to current, power factor, and temperature values measured at the same time.

The failure prognostic point calculation unit 131 determines whether current, power factor, and temperature each reach their respective risk levels (S10). In the case of the current and power factor, a preset reference current value and a reference power factor value exist, and it is determined whether the measured current and power factor have reached a dangerous level based on the reference current value and the reference power factor value. On the other hand, in the case of temperature, since the reference temperature that can cause a failure of the LED lighting device has a significant difference depending on the place where the corresponding LED lighting device is installed, the environment, and the elements used in the LED lighting device, a separate process is required. Calculate the unique reference temperature of each LED lighting device through The separate process will be described in more detail in the description of FIGS. 4 and 5 below.

The failure point calculation unit 131 checks which elements have reached each risk level for each checkpoint, and derives the number of times the risk level has been reached during a predetermined period (S11). At this time, the failure prognostic point calculation unit 131 determines that a dangerous level has been reached when the current is out of a reference range having a range of 5% based on a preset reference current value. For example, when the reference current value is 700 mA, the reference range corresponds to 665 to 735 mA. In addition, when the power factor is less than the preset reference power factor value, it is determined that the dangerous level has been reached. The preset reference current value is preferably set to 700 mA, and the live reference power factor value is preferably set to 90%, but is not limited thereto, and the reference current value and reference power factor value are provided in the corresponding LED lighting device It may be changed due to the design of the device or the corresponding LED lighting device.

Thereafter, the failure probable point calculation unit 131 performs a probable failure point calculation step of calculating (S12) the number of probable failure points of the LED lighting device based on whether or not the number of arrivals and the number of arrivals derived in step S12 are performed. A more detailed description of the step of calculating the number of failure points will be described later in the description of FIGS. 6 and 7 below.

4 schematically illustrates the process of setting the reference temperature according to an embodiment of the present invention, and FIG. 5 shows a derating curve for the LED module 220 according to an embodiment of the present invention. show schematically.

As shown in FIG. 4, the predictive maintenance method further includes a reference temperature setting step of setting a reference temperature only for the corresponding LED lighting device with respect to the temperature measured in the temperature measuring step, wherein the reference temperature setting step , When the current and power factor of the LED lighting device measured at each predetermined cycle reach the dangerous level at the same time, the average temperature of the lighting unit 200 during the period reached at the same time is calculated, and the calculated average temperature is the corresponding LED light Set as the standard temperature for the device only.

Specifically, as described above, since the reference temperature corresponding to the risk level is different for each LED lighting device, the preset reference temperature value is not used in the calculation of the number of possible failure points, and the reference temperature of each LED lighting device is set. The reference temperature setting step is performed. As shown in FIG. 5 , it can be confirmed that the allowed forward current decreases according to the ambient temperature Ta in the thermal reduction curve. The degree of reduction and the temperature are inherent characteristics of the LED element or LED module 220, and there is a slight difference for each element or module. If the LED module 220 has a thermal reduction curve as shown in FIG. 5, in a state where the ambient temperature exceeds about 80 degrees and the allowable current is about 0.4 A or less, when the ambient temperature is 20 degrees and If the same current is applied, there is a risk that the corresponding LED module 220 may fail or cause a fire because a current exceeding the allowable current is applied.

Therefore, identifying and driving the temperature at which the power factor rapidly decreases is an element for maintaining the life of the LED lighting device for a long time, but it is practically difficult to store different heat reduction curve data for each street light in a street light or control server. . In addition, there is a problem that storing the thermal reduction curve data for each device in advance is not very helpful for maintenance because the thermal reduction curve data value is different when the original LED device is broken and replaced with another device. Therefore, the reference temperature setting unit 132 of the present invention performs the reference temperature setting step as follows in order to solve the above-mentioned problems.

As shown in FIG. 4, since the power factors measured at the first checkpoint and the second checkpoint are both larger than the reference power factor value, and the measured current value is measured within the reference range, the reference temperature setting unit 132 ) determines that a factor that can cause a failure of the corresponding LED lighting device does not occur in the first to second checkpoints. In addition, the current value measured at the third checkpoint in FIG. 4 was measured within the reference range, but the measured power factor value was measured to be less than the reference power factor value. In this way, when only one element reaches the dangerous level, the risk of failure of the corresponding LED lighting device is not great and is not separately processed.

However, at the fourth checkpoint, the measured power factor value was measured lower than the reference power factor value, and the measured current value was measured out of the reference range. In this way, when the reference temperature setting unit 132 determines that both the current and the power factor have reached a dangerous level, the average temperature for a preset section is calculated based on the fourth checkpoint, and the average temperature is used as the corresponding LED light. Set as the standard temperature of the device. Preferably, the predetermined interval is set from an intermediate point between the previous checkpoint and the current checkpoint to an intermediate point between the next checkpoint and the current checkpoint. Meanwhile, although FIG. 4 shows six checkpoints included within a predetermined period for convenience of description, in the present invention, it is preferable that more checkpoints exist within a predetermined period.

Additionally, according to an embodiment of the present invention, when there are two or more checkpoints in which both the power factor and the current reach the dangerous level, as shown in the fourth checkpoint of FIG. 4 during a predetermined period, both the power factor and the current are at the dangerous level. An average temperature for a preset section may be calculated based on each of all checkpoints reached, and an average value may be calculated for two or more calculated average temperatures to be set as the reference temperature. For example, assuming that the power factor and the current reach the dangerous level at the 4th, 7th, and 8th checkpoints, the average temperature (T ₄ ) is calculated in a preset section based on the 4th checkpoint, An average temperature (T ₇ ) is calculated in a preset section based on the seventh checkpoint, and an average temperature (T ₈ ) is calculated in a preset section based on the eighth checkpoint. Thereafter, the average values of T _{4 ,} T ₇ , and T ₈ are calculated and set as the reference temperature of the corresponding LED lighting device.

As described above, by performing the reference temperature setting step of setting its own reference temperature for each LED lighting device, more accurate predictive maintenance can be performed by setting a reference temperature suitable for the environment in which the corresponding LED lighting device is installed. , Even if a problem with the LED lighting device occurs and the LED module 220 of a manufacturer other than the conventional LED module 220 manufacturer is replaced, the reference temperature suitable for the replaced LED module 220 can be found by itself. The predictive maintenance method of the present invention can be used as it is without additional system modification.

6 schematically shows a process of calculating the number of probable points according to an embodiment of the present invention, and FIG. 7 schematically shows a table for calculating the number of probable points according to an embodiment of the present invention.

As shown in FIGS. 6 and 7, in the step of calculating the number of probable failure points, a dangerous level is reached when the current measured in the current measuring step is out of the reference range having a range of 5% based on the preset reference current value. If the power factor measured in the power factor measuring step is less than the preset reference power factor value, it is determined that the dangerous level has been reached, and if the temperature measured in the temperature measuring step exceeds the reference temperature, it is determined that the dangerous level has been reached , Whenever each of the current, power factor, and temperature reaches a dangerous level, the failure prediction score of the corresponding LED lighting device is added,

In the step of calculating the number of failure points, when one of current, power factor, and temperature reaches a dangerous level at a specific time, the failure point is added by a first point, and two elements of current, power factor, and temperature are added at a specific time. reaches the danger level at the same time, the failure prediction score is added by the second score for each element, and when three elements among current, power factor, and temperature reach the danger level at the same time at a specific time, the failure prediction score for each element It is added by 3 points, and the second score is greater than the first score, and the third score is greater than the second score.

Specifically, after the reference temperature setting step is performed, the failure prognostic point calculation unit 131 of the present invention sets a checkpoint at each predetermined period in the manner described above with respect to FIG. 3 . That is, the points in time of the current, power factor, and temperature profiles at each checkpoint correspond to current, power factor, and temperature values measured at the same time. The failure prediction point calculation unit 131 determines whether the current, power factor, and temperature reach a dangerous level at each checkpoint set at a preset period during a preset period, and calculates a failure prediction score based on this. 6 and 7 show six checkpoints included in a predetermined period for convenience of explanation, but in the present invention, it is preferable that more checkpoints exist within a predetermined period.

FIG. 7 schematically shows a table generated based on the results determined from the profile shown in FIG. 6, which is for explanation only, and is different from the form shown in FIG. Other methods can determine if the current, power factor, or temperature has reached a critical level. In addition, in FIG. 7, as an embodiment of the present invention, the first score is set to 1 point, the second score to 2 points, and the third score to 3 points to calculate the high score, but this is an example for explanation. only, and in the present invention, it can be changed by an administrator. When the difference between the first score, the second score, and the third score is set small, an effect of generating a failure risk notification sensitively even for a small problem can be exerted, and the first score, the second score, and the In the case of setting a large difference in the third score, it is possible to exert an effect of enabling a failure risk notification to be generated more reliably when there is a failure risk by giving weight to problems that occur simultaneously.

Referring to the three profiles shown in FIG. 6 , it can be confirmed that none of the current, power factor, and temperature reached a dangerous level at the first and second checkpoints, and as a result, a failure occurred at the first and second checkpoints. It can be seen that the predictive score was not calculated.

At the third checkpoint, it can be confirmed that the measured temperature is higher than the reference temperature and the measured power factor is smaller than the reference power factor value. Since the current was measured within the standard range, there are two factors that reached the critical level in the third checkpoint. Since two elements reached the risk level at the same time, the failure prediction score was added by the second score for each element, and as a result, the failure prediction score calculated at the third checkpoint is 4 points (= 2 X 2 points).

In the same way, at the fourth checkpoint, since the current, power factor, and temperature all reached the dangerous level, the failure prediction points were added by the third score for each element. As a result, the failure prediction points calculated at the fourth checkpoint is 9 points (= 3 X 3 points), and since only the temperature reached the critical level at the fifth checkpoint, only the first point is added to calculate a failure prediction score of 1 point.

In this way, with reference to FIG. 7 , it is possible to calculate the failure prognosis score for a predetermined period of time, and if the failure prognosis score exceeds the preset reference score, the manager terminal transmits the failure prognosis score of the corresponding LED lighting device. By doing so, you can request an inspection before a failure occurs. Through this, it is possible to notify the manager of the failure risk of the street light, and as a result, it is possible to exert an effect of preventing safety accidents that may occur due to the failure of the street light.

8 schematically illustrates the steps performed in the device information transmission step according to an embodiment of the present invention.

As shown in FIG. 8 , the predictive maintenance method further includes a device information transmission step, wherein the device information transmission step includes: receiving a communication request command from a manager terminal to a corresponding LED lighting device; Confirming whether the manager terminal sending the communication request command is an approved manager terminal; and, in the case of an approved manager terminal, transmitting device information of the corresponding LED lighting device to the manager terminal, wherein the device information of the LED lighting device includes: device information of the LED lighting device; manufacturer information; temperature, power factor, and current profiles; when to install; usage time; And A / S management history; includes.

Schematically, FIG. 8(a) schematically shows a state in which a manager checks device information of a streetlight through a manager terminal, and FIG. 8(b) schematically shows the execution step of the device information transmission step.

Specifically, in the prior art, when a lighting device malfunctions, in order to replace a malfunctioning part of the lighting device, it is necessary to know information about the lighting device and manufacturer information to perform repairs. In order to obtain such information, a manager directly There was a problem of going to the place where the device is installed and checking the information of the corresponding lighting device. In particular, considering the feature of being installed at a high location with a wide interval, such as a lighting device installed outdoors such as on a road or in a residential area, it takes a lot of time and money for the manager to go to the installation site every time as described above, and safety problems existed. Therefore, in the present invention, as shown in (a) of FIG. 8, even if the manager does not directly go up, the information and status of the corresponding lighting device can be received, and through this, quick follow-up processing is performed on the malfunctioning lighting device. You can exert the effect you can. FIG. 8(a) illustrates a state in which an LED lighting device and a manager terminal exchange information with each other by performing wireless communication with reference to FIG. 2 .

As shown in (a) of FIG. 8, the manager terminal may be located near the LED lighting device and perform tagging. When tagging is performed as above, the manager terminal transmits a communication request command to the corresponding LED lighting device (S20). At this time, the manager may perform communication with the corresponding LED lighting device through a program, software (software, s/w), or application (application, app) installed in the manager terminal. Upon receiving the communication request command, the wireless communication unit 150 of the LED lighting device verifies that the manager terminal that sent the communication request command is an approved manager terminal (S22). In order to verify the manager terminal, according to an embodiment of the present invention, the manager terminal inputs the manager password before sending the communication request command (S21) and then transmits the communication request command, thereby authenticating that it is an approved manager terminal. According to another embodiment of the present invention, first, the manager terminal transmits a communication request command, and the wireless communication unit 150 receiving it transmits a verification notification to the manager terminal, and then the manager terminal transmits the verification notification. It is possible to authenticate that it is an administrator terminal by inputting an administrator password for notification.

When confirming that the manager terminal is an approved manager terminal, the wireless communication unit 150 transmits device information of the corresponding LED lighting device to the manager terminal (S23). The device information is data stored in the data storage unit of the corresponding LED lighting device. A manager receiving the device information through the manager terminal may perform follow-up actions based on the device information.

The device information includes device information of the corresponding LED lighting device; manufacturer information; temperature, power factor, and current profiles; failure prognosis score; when to install; usage time; Corresponds to data including; and A/S management history. the device information; and manufacturer information; can be used for maintenance of the corresponding LED lighting device, the temperature, power factor, and current profile; and failure prognosis points; may be used to determine the state of the corresponding LED lighting device. In addition, the installation time; usage time; and A/S management history; can be used as a main reference for maintenance of the LED lighting device. The device information includes, for example, the model name of the LED device used in the corresponding LED lighting device; operating temperature; preservation temperature; critical temperature; driving DC current; location information; and the model name and authentication information of the light source, instrument, and SMPS 210 used in the device; etc. may be included.

On the other hand, as an embodiment of the present invention, ordinary citizens can also tag the LED lighting device through their user terminal. For example, when a citizen discovers a street light or security light that is out of order, the citizen can report the failure of the corresponding LED lighting device using an application installed on his/her user terminal. Specifically, the citizen goes near the street light or lighting lamp and tries tagging the LED lighting device, receives the device information of the LED lighting device using an application installed on his or her user terminal, transmits it to the control server, and You can report a malfunction of the LED lighting device. At this time, the device information of the corresponding LED lighting device received by the citizen's user terminal corresponds to very limited information compared to the device information transmitted to the aforementioned manager terminal. For example, the citizen's user terminal can receive only the location information or identification information of the corresponding LED lighting device, and transmits it to the control server to report a failure of the corresponding LED lighting device. On the other hand, when reporting a malfunctioning terminal through a citizen's user terminal, the LED lighting device does not perform a step of verifying whether the user is authorized, as in the above steps S21 to S22.

9 schematically shows a flowchart of a predictive maintenance method performed in an LED lighting device according to an embodiment of the present invention.

As shown in FIG. 9, as a predictive maintenance method performed in an LED lighting device, the LED lighting device includes a controller 100; and a lighting unit 200, wherein the predictive maintenance method includes: a current measuring step of measuring a current input from the controller 100 to the lighting unit 200; a power factor measurement step of measuring a power factor of power input from the controller 100 to the lighting unit 200; a temperature measurement step of measuring the temperature of the lighting unit 200; At each predetermined cycle, it is determined whether the current, power factor, and temperature measured in the current measurement step, the power factor measurement step, and the temperature measurement step each reach their respective risk levels, and based on whether they have reached and the number of times, the corresponding LED lighting a failure predictive score calculation step of calculating a failure predictive score indicating a failure risk of the device; and a failure risk transmission step of transmitting the failure prognosis points to a manager terminal when the failure prognosis points accumulated during a predetermined period are calculated to be equal to or greater than a predetermined reference score, or upon request from the manager terminal.

Specifically, before the LED lighting device is installed for the first time, the device information of the corresponding LED lighting device is input to the controller 100 of the corresponding LED lighting device and stored (S30). The device information input at this time includes device information, manufacturer information, and installation time. Afterwards, the LED lighting device installed in the street light or security light performs operation according to the pre-stored logic or command. If there is no separate device information request (S20) from the manager terminal, the current measuring unit 121, power factor measuring unit 122, and temperature measuring unit 140 of the LED lighting device measure current, power factor, and temperature, respectively. Then, a profile according to time is created, and a failure prognosis score is calculated therefor to collect the operating state of the corresponding lighting device (S32.1 to S32.2). Additionally, the operating time during which the lighting unit 200 of the corresponding LED lighting device operates is separately recorded (S32.3).

While performing the above steps S32.1 to S32.3, the number of failure prediction points is calculated at a predetermined cycle, and when the calculated number of failure prediction points is less than or equal to the predetermined standard, no separate operation is performed, and the calculated failure prediction score is based on the predetermined standard. If it exceeds, separate follow-up measures such as sending a failure notification to the manager terminal may be performed (S33). In addition, the current, power factor, temperature profile, and operating time information collected in step S32 are stored in a data storage unit (S34). According to an embodiment of the present invention, data processing such as compression may be performed to secure data space in the storage process.

If the manager terminal attempts communication by tagging the corresponding LED lighting device (S31), and the corresponding LED lighting apparatus receives a corresponding communication request command from the manager terminal (S35), with reference to the description of FIG. 8, the Device information of the corresponding LED lighting device is transmitted to the manager terminal (S36). At this time, the transmitted device information corresponds to the data stored in the data storage unit in step S34.

According to one embodiment of the present invention, by calculating the number of failure prognostic points, it is possible to know in advance the possibility of a failure before a failure of the LED lighting device occurs, and through this, the possibility of a failure of the LED lighting device It can exert an effect that can prevent safety accidents in advance.

According to one embodiment of the present invention, by calculating the number of failure prediction points considering a plurality of factors measured in the LED lighting device, it is possible to exert an effect of performing more accurate predictive maintenance.

According to one embodiment of the present invention, even if the manager of the LED lighting device does not climb directly onto the LED lighting device, it is possible to receive the information of the corresponding LED lighting device to the manager terminal using a wireless communication network, and through this, the maintenance of the LED lighting device And it can exert the effect of reducing the cost consumed for maintenance.

According to an embodiment of the present invention, it is possible to individually set the reference temperature for predicting the risk of failure of the LED lighting device, thereby exhibiting the effect of performing predictive maintenance in consideration of the elements provided in the LED lighting device and the environment in which they are installed. can

According to an embodiment of the present invention, the LED lighting device can exert an effect of performing short-range wireless communication capable of transmitting information even with low power by performing communication with a manager terminal in a BLE and UWB manner.

As described above, although the embodiments have been described with limited examples and drawings, those skilled in the art can make various modifications and variations from the above description. For example, the described techniques may be performed in an order different from the method described, and/or components of the described system, structure, device, circuit, etc. may be combined or combined in a different form than the method described, or other components may be used. Or even if it is replaced or substituted by equivalents, appropriate results can be achieved. Therefore, other implementations, other embodiments, and equivalents of the claims are within the scope of the following claims.

Claims (6)

As a predictive maintenance method performed in an LED lighting device,
The LED lighting device includes a controller; And a lighting unit; including,
The predictive maintenance method,
a current measuring step of measuring a current input from the controller to the lighting unit;
a power factor measurement step of measuring a power factor of power input from the controller to the lighting unit;
a temperature measurement step of measuring the temperature of the lighting unit;
A reference temperature setting step of setting a reference temperature only for the corresponding LED lighting device with respect to the temperature measured in the temperature measuring step;
At each predetermined cycle, it is determined whether the current, power factor, and temperature measured in the current measurement step, the power factor measurement step, and the temperature measurement step each reach their respective risk levels, and based on whether they have reached and the number of times, the corresponding LED lighting a failure predictive score calculation step of calculating a failure predictive score indicating a failure risk of the device; and
And a failure risk transmission step of transmitting the failure prognosis points to a manager terminal when the failure prognosis points accumulated during a predetermined period are calculated to be equal to or greater than a predetermined reference score, or upon request from the manager terminal,
The reference temperature and the failure prognostic points are calculated based on at least two of profiles of the current, the power factor, and the temperature measured at a plurality of checkpoints set for each predetermined period, and the current at the checkpoint , the power factor, and each of the temperature profiles are time-synchronized with each other,
In the step of setting the reference temperature,
If the current of the corresponding LED lighting device measured at the checkpoint having a preset cycle is out of the standard range and the power factor value of the corresponding LED lighting device measured at the same checkpoint is measured as less than the standard power factor value, the corresponding checkpoint is the criterion Calculate the average temperature of the preset section, set the calculated average temperature as the reference temperature only for the LED lighting device,
The preset section may be set from a midpoint between a checkpoint previous to the corresponding checkpoint and a midpoint between a checkpoint next to the checkpoint and a midpoint between the checkpoint,
In the step of calculating the number of failure prediction points,
If the current measured in the current measuring step is out of the reference range having a range of 5% based on the preset reference current value, it is determined that the dangerous level has been reached,
When the power factor measured in the power factor measurement step is less than a preset reference power factor value, it is determined that the danger level has been reached;
If the temperature measured in the temperature measurement step exceeds the reference temperature, it is determined that the dangerous level has been reached,
Each time the current, power factor, and temperature reach a dangerous level, the failure prediction score of the corresponding LED lighting device is added,
When one of the current, power factor, and temperature elements reaches a dangerous level at a specific checkpoint, the failure prediction score calculated at the checkpoint is added by the first score,
At a specific checkpoint, if two elements among current, power factor, and temperature reach a dangerous level at the same time, the failure prediction score calculated at the checkpoint is added by the second score for each element,
At a specific checkpoint, if three elements among current, power factor, and temperature reach a dangerous level at the same time, the failure prediction score calculated at the checkpoint is added by the third score for each element.
The predictive maintenance method, wherein the second score is greater than the first score, and the third score is greater than the second score.
delete delete delete The method of claim 1,
The predictive maintenance method,
Further comprising the step of transmitting device information,
In the device information transmission step,
Receiving a communication request command from the manager terminal to the corresponding LED lighting device;
Confirming whether the manager terminal sending the communication request command is an approved manager terminal; and
In the case of an approved manager terminal, transmitting device information of the corresponding LED lighting device to the manager terminal; Including,
The device information of the LED lighting device,
device information of the LED lighting device; manufacturer information; temperature, power factor, and current profiles; when to install; usage time; And A / S management history; including, predictive maintenance method.
As an LED lighting device including a predictive maintenance function,
The LED lighting device includes a controller; And a lighting unit; including,
The controller,
a current measurement unit for measuring a current input to the lighting unit;
a power factor measurement unit for measuring a power factor of power input to the lighting unit;
a temperature measurement unit for measuring the temperature of the lighting unit;
a reference temperature setting unit for setting a reference temperature only for the corresponding LED lighting device with respect to the temperature measured by the temperature measurement unit;
At each predetermined period, it is determined whether the current, power factor, and temperature measured by the current measurement unit, the power factor measurement unit, and the temperature measurement unit each reach their respective risk levels, and based on whether or not they have reached and the number of times, the corresponding LED lighting a failure prediction score calculation unit that calculates a failure prediction score indicating a failure risk of the device; and
And a failure risk transmission unit for transmitting the failure prediction score to the manager terminal when the failure prognosis score accumulated during a predetermined period is calculated to be equal to or greater than a predetermined reference score, or upon request from the manager terminal,
The reference temperature and the failure prognostic points are calculated based on at least two of profiles of the current, the power factor, and the temperature measured at a plurality of checkpoints set for each predetermined period, and the current at the checkpoint , the power factor, and each of the temperature profiles are time-synchronized with each other,
The reference temperature setting unit,
If the current of the corresponding LED lighting device measured at the checkpoint having a preset cycle is out of the standard range and the power factor value of the corresponding LED lighting device measured at the same checkpoint is measured as less than the standard power factor value, the corresponding checkpoint is the criterion Calculate the average temperature of the preset section, set the calculated average temperature as the reference temperature only for the LED lighting device,
The preset section may be set from a midpoint between a previous checkpoint and the corresponding checkpoint to a midpoint between a next checkpoint and the corresponding checkpoint,
The failure prediction point calculation unit,
When the current measured by the current measurement unit is out of the reference range having a range of 5% based on the preset reference current value, it is determined that the dangerous level has been reached;
When the power factor measured by the power factor measurement unit is less than a preset reference power factor value, it is determined that a dangerous level has been reached;
When the temperature measured by the temperature measuring unit exceeds the reference temperature, it is determined that the dangerous level has been reached,
Each time the current, power factor, and temperature reach a dangerous level, the failure prediction score of the corresponding LED lighting device is added,
When one of the current, power factor, and temperature elements reaches a dangerous level at a specific checkpoint, the failure prediction score calculated at the checkpoint is added by the first score,
At a specific checkpoint, if two elements among current, power factor, and temperature reach a dangerous level at the same time, the failure prediction score calculated at the checkpoint is added by the second score for each element,
At a specific checkpoint, if three elements among current, power factor, and temperature reach a dangerous level at the same time, the failure prediction score calculated at the checkpoint is added by the third score for each element.
The LED lighting device including a predictive maintenance function in which the second score is greater than the first score and the third score is greater than the second score.

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