Construction machinery system using Li-Fi technology
A construction machinery system using Li-Fi technology, according to an embodiment of the present disclosure, comprises an LED module unit, a Li-Fi signal reception unit, and a control unit. Each of a plurality of LED module units is arranged in an area in which a GPS signal is not received, and generates and transmits a Li-Fi signal. The Li-Fi signal reception unit is arranged in construction machinery and receives a Li-Fi signal. The control unit is arranged in the construction machinery and calculates the location of the construction machinery by using a Li-Fi signal.
1 . A construction machinery system using Li-Fi technology, comprising:
a GPS signal reception unit disposed at a first location where GPS signals are smoothly received, the GPS signal reception unit receiving GPS signals transmitted from GPS satellites and generating GPS coordinates;
a plurality of LED module units disposed at a second location, separated from the GPS signal reception unit and located in an area where the GPS signals are not received, the LED module units being electrically connected to each other to receive the GPS signals to generate and transmit Li-Fi signals;
a Li-Fi signal reception unit disposed on a construction machine located at the second location and receiving the Li-Fi signals generated by the LED module units;
a plurality of sensor units disposed on respective components of the construction machine, each of the sensor units measuring a rate and an amount of change with respect to posture transformation or positional movement of the respective components of the construction machine, or measuring angles of the respective components; and
a control unit calculating the positions of the construction machine and the respective components based on the Li-Fi signals received by the Li-Fi signal reception unit and the measurements of the respective components obtained by the sensor units,
wherein each LED module unit further includes an input unit into which the GPS coordinates of the GPS signal reception unit, a unique identification mark (ID) of the LED module unit, positioning coordinates of the LED module unit, illumination information, and time information of the LED module unit are input,
wherein the positioning coordinates of the GPS signal reception unit indicate the location of the GPS signal reception unit using the point where the GPS signal reception unit is placed as a reference point, and the positioning coordinates of the LED module unit indicate the location of the LED module unit using the point where the GPS signal reception unit is placed as a reference point.
2 . The system of claim 1 , wherein the LED module unit includes a Li-Fi signal generator that generates the Li-Fi signals and a light emitting diode (LED) that is electrically connected to the Li-Fi signal generator and transmits the Li-Fi signals.
3 . The system of claim 1 , wherein the Li-Fi signals are generated in one frame unit, and the one frame unit includes data on the GPS and positioning coordinates of the GPS signal reception unit, the unique identification mark (ID) of the LED module unit, the positioning coordinates of the LED module unit, and the illuminance and the time of the LED module unit.
4 . The system of claim 1 , wherein the LED module unit includes the LED that transmits the Li-Fi signals, and the LED continuously transmits the Li-Fi signals over time.
5 . The system of claim 3 , wherein the control unit calculates the positioning coordinates of the Li-Fi signal reception unit based on the positioning coordinates of the LED module unit and the distance between the LED module unit and the Li-Fi signal reception unit, and the positioning coordinates of the Li-Fi signal reception unit are coordinates for indicating the location of the Li-Fi signal reception unit using the point where the GPS signal reception unit is placed as a reference point.
6 . The system of claim 5 , wherein the control unit calculates the GPS coordinates of the Li-Fi signal reception unit by adding the GPS coordinates of the GPS signal reception unit to the positioning coordinates of the Li-Fi signal reception unit.
7 . The system of claim 1 , wherein the sensor unit is a sensor for measuring an angle, the construction machine is an excavator, and the sensor unit measures the angles of the main body, the boom, the arm, and the bucket of the excavator.
8 . The system of claim 7 , wherein the control unit analyzes the Li-Fi signals to calculate the location of the excavator, and calculates the position of the end of the bucket based on sensor values of the sensor unit disposed on the main body, the boom, the arm, and the bucket of the excavator.
9 . The system of claim 7 , further comprising a display unit that displays the position of the excavator and the position of the end of the bucket.
10 . The system of claim 9 , wherein the display unit displays the plurality of LED module units.
11 . The system of claim 1 , further comprising a map data storage unit including a working drawing of the second location.
12 . The system of claim 9 , further comprising the map data storage unit including the working drawing of the second location, wherein the display unit displays the working drawing.
13 . The system of claim 12 , wherein the map data storage unit includes a working drawing of the first location, and the display unit separately displays the working drawing of the first location and the working drawing of the second location.