Personal mobile device, method for controlling stability thereof, and recording medium

Abstract

The present disclosure relates to a personal mobility device, a method for controlling the stability of the personal mobility device, and a recording medium. The personal mobility device, configured to prevent multiple passengers from riding therein, and the method for controlling the stability of the personal mobility device, may include a sensor unit, a communication unit, and a controller. The sensor unit includes multiple sensors configured to detect the current vehicle weight on the personal mobility device, pressure applied to the deck, and driving speed. The communication unit is configured to send and receive data to and from a user's communication terminal device. The controller is configured to analyze information about the user's weight provided by the communication unit and sensing information provided by the sensor unit to determine whether multiple passengers are riding in the personal mobility device and control the operation of the driving unit to prevent accidents when multiple passengers are riding therein.

Description

[0001] This application claims priority from Korean Patent Application No. 10-2020-0104505, filed on August 20, 2020, which is hereby incorporated by reference in its entirety. Technical Field

[0002] The present invention relates to a personal mobility device configured to prevent multiple occupants from riding therein and a method of controlling stability using the personal mobility device. Background Art

[0003] As part of the so-called Fourth Industrial Revolution, technologies for the sharing economy are already underway, and in particular, personal mobility is most actively moving from private ownership to the shared realm.

[0004] In line with these trends, electric two-wheeled vehicles, such as electric kickboards, have become widely popular. Electric kickboards are typically used as personal mobility devices and are designed to travel at speeds significantly higher than a typical walking pace. During nighttime travel, electric kickboards can collide with protrusions on the front surface or unexpected terrain features, causing a rider to lose balance or fall. When two or more people ride on an electric kickboard, the restoring force generated by rapid steering maneuvers is difficult to recover, and the electric kickboard can easily overturn, potentially injuring passengers.

[0005] The information included in the Background of the Invention section is only for enhancement of understanding of the general background of the invention and should not be considered as an acknowledgment or any form of suggestion that this information forms the prior art already known to a person skilled in the art. Summary of the Invention

[0006] Various aspects of the present invention are directed to providing a personal mobility device configured to prevent multiple occupants from riding therein and a method of controlling stability using a personal mobility device.

[0007] Various aspects of the present invention are directed to a personal mobility device and method of controlling stability thereof that are configured to prevent accidents when multiple occupants are riding therein.

[0008] Technical problems solved by the exemplary embodiments are not limited to the above-mentioned technical problems, and other technical problems not described herein will become apparent to those skilled in the art from the following description.

[0009] In one aspect, various aspects of the present invention are directed to providing a personal mobility device comprising: a drive unit configured to control the rotation of wheels; a sensor unit comprising a plurality of sensors configured to detect the current vehicle load weight, pressure applied to the deck, and driving speed on the personal mobility device; a communication unit configured to send data to or receive data from a user's communication terminal device; and a controller configured to analyze information about the user's weight provided by the communication unit and sensing information provided from the sensor unit to determine whether multiple passengers are riding in the personal mobility device, and to control the operation of the drive unit.

[0010] On the other hand, a method for controlling the stability of a personal mobility device includes: receiving information about the weight of a user from an authenticated communication terminal device of the user; receiving sensing values from a plurality of sensors included in a sensor unit; analyzing the information about the weight of the user and the sensing values, and determining whether a plurality of passengers are riding in the personal mobility device; and controlling the operation of a driving unit of the personal mobility device when it is determined that a plurality of passengers are riding in the personal mobility device.

[0011] The methods and apparatus of the present invention have other features and advantages that will become apparent from or be described in more detail in the accompanying drawings and the following detailed description incorporated herein, which together serve to explain certain principles of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a diagram showing an example of a configuration of a personal mobile device applicable to an exemplary embodiment of the present invention;

[0013] Figure 2 is a schematic diagram illustrating an example of a configuration of a rental system for using a personal mobile device according to various exemplary embodiments of the present invention;

[0014] Figure 3 is a block diagram functionally illustrating a configuration of a personal mobile device according to various exemplary embodiments of the present invention;

[0015] Figure 4 is a diagram illustrating an operational relationship of a system and illustrates the operation of a method of controlling stability of a personal mobility device according to various exemplary embodiments of the present invention;

[0016] Figure 5 is a flow chart of operations for determining whether multiple occupants are riding in a personal mobility device;

[0017] Figure 6is a diagram illustrating an operational relationship of a system and illustrates the operation of a method of controlling stability of a personal mobility device according to various exemplary embodiments of the present invention;

[0018] Figure 7 is a flowchart of operations performed by a controller of a personal mobility device when a service providing server determines whether a plurality of occupants are riding in the personal mobility device;

[0019] Figure 8 is a flow chart of operations for determining whether multiple occupants are riding in a personal mobility device; and

[0020] Figure 9 is a flowchart illustrating an operation for controlling a driving unit when it is determined that a plurality of occupants are riding in a personal mobility device.

[0021] It will be appreciated that the accompanying drawings are not necessarily drawn to scale and present a somewhat simplified representation of various features illustrating the basic principles of the invention. Specific design features of the present invention as incorporated herein include, for example, specific dimensions, orientations, locations, and shapes, which will be determined in part by the specific intended application and use environment.

[0022] In the drawings, reference numbers refer to the same or equivalent parts of the present invention throughout the figures. DETAILED DESCRIPTION

[0023] Reference will now be made in detail to various embodiments of the present invention, examples of which are illustrated in the accompanying drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments thereof, it should be understood that the description is not intended to limit the invention to those exemplary embodiments. On the other hand, the present invention is intended to cover not only the exemplary embodiments of the present invention, but also various alternatives, modifications, equivalents and other embodiments that may be included within the spirit and scope of the present invention as defined by the appended claims.

[0024] Exemplary embodiments of the present invention are described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. However, the present invention can be implemented in various forms and is not limited to these embodiments. To clearly describe the present invention, parts not related to the description are omitted from the drawings, and the same reference numerals in the specification represent the same elements.

[0025] Throughout the specification, unless explicitly described to the contrary, the word "comprise" and variations such as "comprises" or "comprising" will be understood to imply the inclusion of stated elements but not the exclusion of any other elements. Throughout the drawings, the same reference numerals designate the same or similar parts.

[0026] According to an exemplary embodiment of the present invention, although the case where the personal mobility device is an electric kickboard has been described, this is for convenience of description, and the personal mobility device may be any device as long as the device includes a controller configured to control a drive unit of a transport device to drive the drive unit of the transport device using a drive motor operated by power provided by a battery provided therein.

[0027] Figure 1 is a diagram illustrating an example of a configuration of a personal mobile device applicable to an exemplary embodiment of the present invention.

[0028] Reference Figure 1 , the personal mobility device 100 according to various exemplary embodiments of the present invention may broadly include frame units 110 , 120 , 130 , and 140 , and wheel units 150 , 151 , 160 , and 161 .

[0029] The frame unit may include a deck 110 on which a user steps, a handlebar 130 connected to the front wheel 150 to steer the front wheel 150 , a steering tube 120 through which the handlebar 130 penetrates, and a connector 140 for connecting the deck 110 and the steering tube 120 .

[0030] The front wheel 150 may include a front wheel brake 151, and the rear wheel 160 may include a rear wheel brake 161. The front wheel brake 151 and the rear wheel brake 161 may apply a method using brake pads attached to a brake disc and a brake caliper, or may also use a drum braking method, but the present invention is not limited thereto.

[0031] The front wheel brake 151 and the rear wheel brake 161 may be configured to apply a braking force in response to manipulation of a plurality of brake levers that are generally provided on opposite sides of the handlebar 130 , respectively.

[0032] Typically, the rear wheels 160 may be connected to a drive source (e.g., a drive motor) for providing a driving force and may serve as drive wheels, but the present invention is not limited thereto. For example, the drive source may be connected to the front wheels 150, or may be connected to both the front wheels 150 and the rear wheels 160.

[0033] Figure 21 is a schematic diagram illustrating an example configuration of a rental system for using personal mobility devices according to various exemplary embodiments of the present invention. As shown in the figure, the personal mobility rental system may include a plurality of personal mobility devices 100 distributed in a predetermined area, a passenger's communication terminal device 300 for transmitting or receiving data to or from the personal mobility devices 100 using a wireless communication method, and a service providing server 500 for performing data communication with the communication terminal device 300 via a communication network. The service providing server 500 may include a database 510 for storing information about users of the personal mobility rental system.

[0034] An electronic tag for recording an identification (ID) of the personal mobility device 100 to identify the personal mobility device 100 may be attached to one side of each personal mobility device 100 .

[0035] The electronic skirting board rental service application may be provided in the communication terminal device 300 , and may have a function for identifying an electronic tag attached to the personal mobile device 100 .

[0036] The communication terminal device 300 can drive the rental service application of the personal mobile device 100 and can access the service providing server 500 through the communication network. The service providing server 500 can manage the rental and return of the personal mobile device 100 through the rental service application of the communication terminal device 300.

[0037] When the communication terminal device 300 recognizes the electronic tag of the personal mobile device 100 , the rental service application may transmit the occupant's member ID and the ID of the personal mobile device 100 recognized from the electronic tag to the service providing server 500 .

[0038] When the ID of the personal mobile device 100 and the member ID of the occupant correspond to each other, the service providing server 500 may process the rental of the personal mobile device 100 .

[0039] Figure 3 2 is a block diagram functionally illustrating the configuration of a personal mobility device according to various exemplary embodiments of the present invention. As shown in the figure, the personal mobility device according to various exemplary embodiments of the present invention may include a sensor unit 210, a controller 220, a communication unit 230, a display unit 240, and a drive unit 250.

[0040] The sensor unit 210 may include a plurality of sensors for sensing the weight and pressure of a passenger stepping on the deck. The sensor unit 210 may include a piezoelectric sensor 211, a pressure sensor 212, an acceleration sensor 213, and a friction sensor 214.

[0041] The piezoelectric sensor 211 may be provided in the deck 110 and may acquire the total weight value of the occupant. A plurality of pressure sensors 212 may be provided at different locations on the upper surface of the deck 110 or below the deck 110 and may be provided parallel to one another along the longitudinal axis of the deck 110 to acquire information on the distribution of pressure due to the weight of the occupant. Needless to say, the arrangement, position, and shape of the piezoelectric sensor are exemplary, and the piezoelectric sensor may not be limited to its position and shape as long as the sensor is configured to acquire the total weight of the occupant.

[0042] The acceleration sensor 213 can detect the driving speed of the personal mobility device. The acceleration sensor 213 can be provided in the handlebar 130 of the personal mobility device 100. The friction sensor 214 can be attached to the wheel to measure the friction between the wheel and the driving road according to the state of the surface of the driving road.

[0043] The driving unit 250 for controlling the rotation of the wheels may include a battery 251 provided in the deck and a driving motor 252 for driving the wheels using power supplied from the battery 251 .

[0044] The communication unit 230 can transmit or receive data to or from the passenger's communication terminal device. The communication unit 230 can include at least one of a short-range wireless communication module such as Bluetooth communication, Zigbee communication, near field communication (NFC) communication, or wireless fidelity (wifi), and a mobile communication module to connect to a mobile radio communication network.

[0045] The communication unit 230 can use the short-range wireless communication module to perform short-range wireless communication with the passenger's communication terminal device 300. The communication unit 230 can use the mobile communication module to perform wireless communication with the service providing server 500. The communication unit 230 can receive the user's data from the healthcare application executed by the user's communication terminal device.

[0046] The controller 220 may analyze the information about the weight of the passenger provided from the communication unit 230 and the sensing information provided from the sensor unit 210. The controller 220 may determine whether a plurality of passengers are riding in the personal mobility device. The controller 220 may control the operation of the driving unit 250 according to the determination result.

[0047] The controller 220 may transmit the results of whether multiple passengers are riding in the personal mobility device to the communication terminal device 300 of the passenger via the communication unit 230. The controller 220 may include a memory for storing riding history information related to the user. The controller 220 may control the drive unit 250 based on the riding history information related to the user stored in the memory.

[0048] The display unit 240 may display safety travel control information to the occupants regarding whether a plurality of occupants are riding in the personal mobility device based on the result of the controller 220. In this case, the display unit 240 may include a sound device configured to output the safety travel control information in the form of voice.

[0049] According to various exemplary embodiments of the present invention, a method for controlling the stability of a personal mobility device configured to prevent multiple occupants from riding therein may include: an operation of determining whether multiple occupants are riding in the personal mobility device by the personal mobility device according to an exemplary embodiment, or an operation of determining whether multiple occupants are riding in the personal mobility device by a service providing server based on sensing information provided from the personal mobility device according to another exemplary embodiment of the present invention.

[0050] Figure 4 1 is a diagram illustrating an operational relationship of the system and illustrates the operation of a method of controlling stability of a personal mobility device according to various exemplary embodiments of the present invention. That is, the diagram illustrates a relationship when the personal mobility device 100 determines whether a plurality of passengers are riding in the personal mobility device.

[0051] The user of the personal mobility device 100 can drive the rental service application provided in the communication terminal device 300. The user refers to a person who uses the personal mobility device 100, and therefore will be used interchangeably with "passenger" in the following description. However, considering the case where multiple passengers ride in the personal mobility device, only the passenger who uses the service of the personal mobility device 100 is referred to as a "user" (S401).

[0052] The user can connect the communication terminal device 300 to the electronic tag provided on the personal mobile device 100. The communication terminal device 300 can receive the electronic tag ID data of the personal mobile device 100 (S402), and can transmit the user ID data including information about the user's weight and the electronic tag ID data to the service providing server 500. The healthcare application is executed by the user's communication terminal device 300 (S403).

[0053] The service providing server 500 may perform an authentication process on the data received from the user's communication terminal device 300 and may then approve the rental service ( S404 ).

[0054] The rental service application driven in the user's communication terminal device 300 may receive the approval information ( S405 ), and then may provide information on the occupant's weight to the personal mobility device 100 ( S406 ).

[0055] The controller 220 provided in the personal mobility device 100 may receive information on vehicle load weight, information on pressure distribution, and information on speed from the sensors 211 , 212 , and 213 of the sensor unit 210 ( S407 ).

[0056] The controller 220 may determine whether a plurality of passengers are riding in the personal mobility device based on the data received from the sensor ( S408 ).

[0057] When it is determined that a plurality of passengers are riding in the personal mobility device, the controller 220 may control the driving unit 250 to stop the personal mobility device 100 ( S409 ).

[0058] The controller 220 may control the communication unit 230 to transmit a result of whether a plurality of passengers are riding in the personal mobility device to the communication terminal device 300 of the user ( S410 ).

[0059] The possibility of accident risk may be displayed in the form of push notification through the rental service application of the communication terminal device 300. In this case, the risk when multiple passengers ride in the personal mobility device may also be indicated in the form of voice (S411).

[0060] The rental service application of the communication terminal device 300 may transmit a result of whether a plurality of passengers are riding in the personal mobility device to the service providing server 500 ( S412 ).

[0061] The service providing server 500 may update the user information stored in the database 510. The service providing server 500 may accumulate the number of times the user violates the rules regarding multiple passengers. When the accumulated number is greater than a predetermined number, the service providing server 500 may limit the user's right to use the service (S413).

[0062] Figure 5 is a flow chart of an operation of determining whether a plurality of passengers are riding in the personal mobility device 100, as shown in FIG. Figure 4 The controller 220 in the personal mobile device 100 may be the subject of each operation.

[0063] As shown in the figure, user authentication information may be received from the user's communication terminal device 300, and the personal mobile device 100 may be converted into a state in which the personal mobile device 100 is configured to be driven (S510).

[0064] Information on the weight of the riding user included in the user authentication information may be extracted (S520).

[0065] The value of the current vehicle load weight may be received from the piezoelectric sensor 211 of the sensor unit 210 ( S530 ).

[0066] Information on the distribution of pressure applied to the deck may be received from the pressure sensor 212 of the sensor unit 210 ( S540 ).

[0067] Information on the current driving speed may be received from the acceleration sensor 213 of the sensor unit 210 ( S550 ).

[0068] The controller 220 may analyze information about each sensor and may determine whether a plurality of passengers are riding in the personal mobility device ( S560 ).

[0069] When it is determined that a plurality of passengers are riding in the personal mobility device, the controller 220 may control the driving unit 250 to stop driving the personal mobility device 100 ( S570 ).

[0070] Figure 6 1 is a diagram illustrating an operational relationship of the system and illustrates the operation of the method of controlling the stability of a personal mobility device according to various exemplary embodiments of the present invention. That is, the diagram illustrates a relationship when the service providing server 500 determines whether a plurality of passengers are riding in the personal mobility device.

[0071] The user of the personal mobile device 100 may drive a rental service application provided in the communication terminal device 300 (S601).

[0072] The user may connect the communication terminal device 300 to the electronic tag provided on the personal mobile device 100. The communication terminal device 300 may receive the electronic tag ID data of the personal mobile device 100 (S602), and may transmit the user ID data including information about the user's weight and the electronic tag ID data to the service providing server 500 (S603).

[0073] The service providing server 500 may perform an authentication process on the data received from the user's communication terminal device 300 and may then approve the rental service ( S604 ).

[0074] The rental service application driven in the user's communication terminal device 300 may receive the approval information (S605), and then may transmit the approval information including the user information to the personal mobile device 100. In this case, information about the user's average weight may be transmitted through the healthcare application executed by the communication terminal device 300 (S606).

[0075] The personal mobility device 100 may receive information about vehicle load weight, information about pressure distribution, and information about speed from the sensors 211 , 212 , and 213 of the sensor unit 210 ( S607 ).

[0076] The personal mobile device 100 may transmit the sensing information to the service providing server 500 ( S608 ).

[0077] The service providing server 500 may analyze the received sensing information and may determine whether a plurality of passengers are riding in the personal mobility device ( S609 ).

[0078] When it is determined that a plurality of passengers are riding in the personal mobility device, the service providing server 500 may transmit a control signal for a driving unit to the personal mobility device 100 ( S610 ).

[0079] The personal mobility device 100 may control the driving unit 250 to stop being driven according to the received control signal ( S611 ).

[0080] When it is determined that multiple passengers are riding in the personal mobility device, the service providing server 500 may transmit a control signal to the user's communication terminal device 300 to push a notification indicating the accident risk through the rental service application of the communication terminal device 300. In this case, when multiple passengers are riding in the personal mobility device, the user's communication terminal device 300 may also indicate the risk in the form of voice (S612).

[0081] The service providing server 500 may update the user information stored in the database 510. The service providing server 500 may accumulate the number of times the user violates the rules regarding multiple passengers. When the accumulated number is greater than a predetermined number, the service providing server 500 may limit the user's right to use the service (S613).

[0082] Figure 7 Yes Figure 6 1 is a flowchart of operations performed by the controller 220 of the personal mobility device when the service providing server 500 determines whether a plurality of passengers are riding in the personal mobility device.

[0083] As shown, occupant authentication information may be received from the communication terminal device 300 , and the personal mobility device 100 may be converted into a state in which the personal mobility device 100 is configured to be driven ( S710 ).

[0084] The value of the current vehicle load weight, information on the pressure distribution applied to the deck, and information on the current traveling speed may be received from the plurality of sensors 211, 212, and 213 of the sensor unit 210 (S720).

[0085] The sensing information may be transmitted to the service providing server 500 through the communication unit 230 ( S730 ).

[0086] When it is determined that a plurality of passengers are riding in the personal mobility device, the service providing server 500 may receive a control signal for the driving unit through the communication unit 230 ( S740 ).

[0087] The driving unit 250 may be controlled to stop driving the personal mobility device 100 ( S750 ).

[0088] Figure 8 is based on Figure 4 or Figure 6 Flowchart of an operation of determining whether a plurality of passengers are riding in a personal mobility device based on sensing information of the personal mobility device 100 or the service providing server 500.

[0089] It can be determined whether the value of the current vehicle load detected by the piezoelectric sensor 211 is equal to or greater than the threshold weight value W th In this case, the threshold weight value W th The value obtained by adding the weight of the user's clothes and belongings to the average weight of the user of the rental service or adding the loading allowance of the objects placed on the deck may be included. In this case, the threshold weight value W th The average weight of the riding users may be determined with an error range of 5% to 10% (S810).

[0090] It may be determined whether the number of the plurality of pressure distributions provided by the plurality of pressure sensors 212 spaced apart from each other below the deck is equal to or greater than a threshold value N th That is, considering the situation where two passengers are riding on the personal mobility device, the threshold N th It may be equal to or greater than 3 (S820).

[0091] Speed information may be received from the acceleration sensor 213, and it may be determined whether the personal mobility device 100 starts traveling. Typically, the personal mobility device 100 travels at a low speed, so when the traveling speed is equal to or greater than 0 km / h, the current state may be determined as a traveling state (S830).

[0092] When each threshold condition is satisfied in the above-described operations S810 , S820 , and S830 , it may be determined that a plurality of passengers are riding in the personal mobility device ( S840 ).

[0093] Figure 9 2 is a flowchart illustrating an operation for controlling a driving unit when it is determined that multiple passengers are riding in a personal mobility device. When it is determined that multiple passengers are riding in a personal mobility device, a subject for controlling the operation of the driving unit may be the controller 220 of the personal mobility device 100.

[0094] A friction coefficient may be received from a friction sensor 214 provided on a wheel of the personal mobility device 100 ( S910 ).

[0095] The friction coefficient depending on the state of the surface of the travel road can be compared with the threshold value F th When the friction coefficient is greater than the threshold F th The controller 220 may cut off the power supplied from the battery 251 to the driving motor 252 and may forcibly reduce the speed of the personal mobility device 100 (S950).

[0096] When the friction coefficient is not greater than the threshold F th When the road surface is in good condition, the power supplied from the battery to the drive motor may be controlled (S930).

[0097] In this case, the personal mobility device 100 may be driven at a low speed to maintain a state in which the personal mobility device 100 is driven at a speed lower than the reference speed for a predetermined period of time T th (S940).

[0098] After the personal mobility device 100 is driven to decelerate and driven at a low speed, the personal mobility device 100 stops being driven ( S960 ).

[0099] The personal mobility device associated with at least various exemplary embodiments of the present invention as configured above can prevent accidents when multiple passengers ride in the personal mobility device.

[0100] A personal mobility device associated with at least various exemplary embodiments of the present invention may detect that multiple passengers are riding in the personal mobility device simultaneously or sequentially, and may control travel of the personal mobility device.

[0101] Those skilled in the art should understand that the effects that can be achieved by using the present invention are not limited to the above specific description, and other advantages of the present invention will be more clearly understood from the detailed description.

[0102] The present invention can also be implemented as computer-readable code on a computer-readable recording medium. A computer-readable recording medium is any data storage device that can store data that can be subsequently read by a computer system. Examples of computer-readable recording media include hard disk drives (HDDs), solid-state drives (SSDs), silicon disk drives (SDDs), read-only memories (ROMs), random-access memories (RAMs), CD-ROMs, magnetic tapes, floppy disks, and optical data storage devices.

[0103] In addition, terms related to control devices such as "controller", "control unit", "control device" or "control module" refer to a hardware device including a memory and a processor, wherein the processor is configured to execute one or more steps interpreted as an algorithmic structure. The memory stores the algorithmic steps, and the processor executes the algorithmic steps to perform one or more processes of the method according to various exemplary embodiments of the present invention. The controller according to the exemplary embodiment of the present invention can be implemented by a non-volatile memory and a processor, the non-volatile memory being configured to store algorithms for controlling the operation of various components of the vehicle or data about software commands for executing the algorithms, and the processor being configured to use the data stored in the memory to perform the operations described above. The memory and the processor may be separate chips. Alternatively, the memory and the processor may be integrated in a single chip. The processor may be implemented as one or more processors.

[0104] The control device may be at least one microprocessor operated by a predetermined program, and the predetermined program may include a series of commands for executing the methods included in the above-described various exemplary embodiments of the present invention.

[0105] In various exemplary embodiments of the present invention, each of the operations described above may be performed by a controller, and the controller may be configured by a plurality of controllers or an integrated single controller.

[0106] To facilitate interpretation and accurate definitions in the appended claims, the terms "above," "below," "inside," "outside," "up," "down," "upward," "downward," "front," "back," "rear," "inside," "outside," "inwardly," "outwardly," "interior," "exterior," "inner," "exterior," "forward," and "rearward" are used to describe features of the exemplary embodiments with reference to the positions of such features as shown in the drawings. It should be further understood that the term "connect" or its derivatives refers to both direct and indirect connections.

[0107] The above descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and it is apparent that many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described to explain certain principles of the present invention and their practical application, so as to enable others skilled in the art to make and utilize various exemplary embodiments of the present invention and various alternatives and modifications thereof. The scope of the present invention is intended to be defined by the appended claims and their equivalents.

Claims

1. A personal mobile device comprising: a drive unit configured to control rotation of a wheel mounted in the personal mobility device; a sensor unit comprising a plurality of sensors configured to detect a current vehicle load weight on the personal mobility device and a travel speed of the personal mobility device; a communication unit configured to transmit data to a communication terminal device of a user or receive data from the communication terminal device of the user; as well as a controller configured to analyze the information about the weight of the user provided by the communication unit and the sensing information provided from the sensor unit to determine whether a plurality of occupants are riding in the personal mobility device, and control the operation of the drive unit according to the determination of whether the plurality of occupants are riding in the personal mobility device, In a case where it is determined that the plurality of passengers are riding in the personal mobility device, controlling the operation of the driving unit includes: comparing a friction coefficient of the wheel, which depends on the surface condition of the travel road, with a threshold value; When it is determined that the friction coefficient exceeds a threshold range, cutting off power supplied from a battery connected to the drive unit to stop driving a drive motor of the drive unit; and When the friction coefficient is determined to be within the threshold range, the power supplied from the battery to the drive motor is controlled to travel at a speed lower than a reference speed for a predetermined period before the power supplied from the battery to the drive motor is cut off.

2. The personal mobility device according to claim 1, wherein: The sensor unit comprises: a piezoelectric sensor disposed on the deck and configured to obtain a value of the current vehicle load weight; a plurality of pressure sensors disposed on the deck and configured to acquire information regarding pressure distribution due to the weight of the occupants; an acceleration sensor configured to detect the driving speed; and A friction sensor is coupled to the wheel and configured to measure friction between the wheel and the driving road according to a surface condition of the driving road.

3. The personal mobility device according to claim 2, wherein: The driving unit includes: the battery; and The driving motor is connected to the battery and the wheel and is configured to drive the wheel using electric power supplied from the battery.

4. The personal mobility device according to claim 3, wherein: The controller is configured to analyze a result obtained by comparing the value of the current vehicle load weight detected by the piezoelectric sensor with a threshold value, information about the pressure distribution detected by the multiple pressure sensors, and the detection result value of the acceleration sensor, and the controller is configured to determine whether the multiple occupants are riding in the personal mobility device.

5. The personal mobility device according to claim 2, wherein: The plurality of pressure sensors are disposed at different locations on the deck to support the occupant.

6. The personal mobility device according to claim 5, wherein: The plurality of pressure sensors are arranged parallel to each other along a longitudinal axis of the deck.

7. The personal mobility device of claim 1, wherein: The controller is configured to transmit a result obtained by determining whether the plurality of passengers are riding in the personal mobility device to the communication terminal device of the user through the communication unit.

8. The personal mobility device of claim 1 , further comprising: A display unit is configured to display safe travel control information to the passengers according to the result of the controller as to whether the plurality of passengers are riding in the personal mobility device.

9. The personal mobility device of claim 8, wherein: The display unit includes a sound device configured to output the safe travel control information according to the result obtained by determining whether the plurality of passengers are riding in the personal mobility device.

10. The personal mobility device of claim 1, wherein: The communication unit is configured to receive data of the user from a healthcare application executed in the communication terminal device of the user.

11. The personal mobility device of claim 1 , wherein: The controller includes a memory configured to store riding history information related to the user, and is configured to control the drive unit according to the riding history information stored in the memory.

12. A method of controlling stability of a personal mobility device, the method comprising: receiving, by a controller, information about the weight of a user from an authenticated communication terminal device of the user; receiving, by the controller, sensing values from a plurality of sensors included in a sensor unit of the personal mobility device; analyzing, by the controller, the information about the weight of the user and the sensed value, and determining whether a plurality of passengers are riding in the personal mobility device; as well as When it is determined that the plurality of passengers are riding in the personal mobility device, the controller controls the operation of the driving unit of the personal mobility device, Wherein, controlling the operation of the driving unit includes: comparing a friction coefficient of the wheel, which depends on the surface condition of the travel road, with a threshold value; When it is determined that the friction coefficient exceeds a threshold range, cutting off power supplied from a battery connected to the drive unit to stop driving a drive motor of the drive unit; and When the friction coefficient is determined to be within the threshold range, the power supplied from the battery to the drive motor is controlled to travel at a speed lower than a reference speed for a predetermined period before the power supplied from the battery to the drive motor is cut off.

13. The method according to claim 12, wherein: Receiving the sensed value includes: Obtaining a current vehicle load value on the personal mobility device; obtaining information about a pressure distribution due to an occupant's weight on the personal mobility device; and A travel speed of the personal mobility device is received.

14. The method according to claim 13, wherein Determining whether the plurality of occupants are riding in the personal mobility device includes: determining whether a difference between the acquired value of the current vehicle weight and the information about the weight of the user is within an error range; determining whether the number of acquired information related to the pressure distribution is equal to or greater than 3; and A determination is made as to whether the wheels of the personal mobility device are in a driving state.

15. The method according to claim 12, further comprising: A result obtained by determining whether the plurality of passengers are riding in the personal mobility device is transmitted by the controller to the communication terminal device of the user.

16. The method according to claim 12, further comprising: Safety travel control information according to a result obtained by determining whether the plurality of passengers are riding in the personal mobility device is displayed to the passengers by the controller.

17. The method according to claim 16, further comprising: The safe driving control information is output to the occupant in the form of voice.

18. A computer-readable recording medium having recorded thereon a program for executing the method according to claim 12.

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