Portable Hazard Zone Indicator

Abstract

The present invention relates to a portable danger area indicator device that indicates a danger area when transporting a work target (cargo) to ensure safety even in the event of a fall of the transported cargo, and is designed to be portable to facilitate use. The device comprises: an operating unit for setting functions for an electromagnet driving function and a danger area indicator; a work target measuring unit that scans a work target to be transported using heavy equipment to generate work target appearance information; a danger area indicator control unit that generates a danger area visual indicator control signal to visually indicate the danger area based on the work target appearance information measured when the danger area indicator function is set by the operating unit, and controls the driving of a laser and the indicator length using the generated visual indicator control signal; a danger area visual indicator unit that adjusts the indicator length of the laser according to the control of the danger area indicator control unit to visually indicate the danger area on the ground; a warning voice generating unit that transmits a warning voice through a speaker to indicate the danger area when transporting the work target according to the control of the danger area indicator control unit; and a warning alarm generating unit that generates a warning alarm to indicate the danger area when transporting the work target according to the control of the danger area indicator control unit.

Description

Technology Field

[0001] The present invention relates to a portable danger zone indicator, and more specifically, to a portable danger zone indicator device that indicates a danger zone during the transport of a work object (cargo) to ensure safety even in the event of a fall of the moving cargo, and is manufactured to be portable to facilitate convenience of use. Background Technology

[0002] Generally, high levels of noise are generated at shipbuilding sites, construction sites, and civil engineering sites. When large and heavy structures are moved using mobile industrial vehicles (e.g., cranes, etc.), workers or passersby in the vicinity may not perceive the movement of the industrial vehicles or structures unless they pay close attention.

[0003] In particular, during shipbuilding, extra caution is required due to the frequent movement of large and heavy structures such as blocks.

[0004] Therefore, when transporting bulky and heavy structures, multiple signalmen are stationed within the radius where the work vehicle and structure move to prevent accidents involving workers or pedestrians caused by the structures.

[0005] Here, if a bulky and heavy ship structure (e.g., a block) separates from the transport device and falls during transport, there is a risk of a major accident.

[0006] To prevent such major accidents, multiple signalmen are stationed around the radius of industrial vehicles and transported structures to ensure the safety of workers and pedestrians.

[0007] This method of ensuring safety by deploying multiple signalmen during the transportation of large structures has disadvantages, such as increased labor costs due to the deployment of many signalmen and the long transportation time required for the structures.

[0008] Therefore, there is a need for technology that can safely transport structures to their destination without the need for signalmen, thereby saving labor costs while ensuring safety, and shorten the transport time by enabling rapid movement without signalmen. Prior art literature

[0009] Republic of Korea Registered Patent 10-1937583 (Registered Jan. 04, 2019) (Work radius display device for heavy equipment vehicles using a laser) Republic of Korea Published Patent Application 10-2020-0117083 (Published Oct. 14, 2020) (Underground control system and control method for high-altitude work) Republic of Korea Registered Patent 10-2249142 (Registered Apr. 30, 2021) (Emergency guidance device using an advertising light) Republic of Korea Published Patent 10-2022-0069670 (Published May 27, 2022) (System and method for detecting and notifying access to hazardous areas within a workplace using image processing and location tracking technology) The problem to be solved

[0010] Therefore, the present invention is proposed to solve the problem of manpower waste caused by the deployment of multiple signalmen and the problem of transport time resulting from the deployment of signalmen when moving bulky and heavy structures in general industrial sites as described above. Its purpose is to provide a portable danger zone indicator that marks a danger zone during the transport of a work object (cargo), thereby ensuring safety even in the event of a fall of the moving cargo, and to facilitate convenience of use by being manufactured as a portable device. means of solving the problem

[0011] In order to achieve the above-mentioned purpose, the "portable danger zone indicator device" according to the present invention is,

[0012] An operating unit for setting functions regarding the electromagnet driving function and danger area indication;

[0013] A work target measuring unit that scans a work target to be transported using heavy equipment and generates work target appearance information;

[0014] A danger area display control unit that generates a danger area visual display control signal to visually display a danger area based on work target appearance information measured when the danger area display function is set by the above-mentioned control unit, and controls the driving of the laser and the display length using the generated visual display control signal;

[0015] A danger area visual display unit that visually displays a danger area on the ground by adjusting the display length of a laser according to the control of the danger area display control unit;

[0016] A warning voice generator that transmits a warning voice through a speaker indicating a danger area when a work object is transported, in accordance with the control of the above-mentioned danger area indication control unit; and

[0017] It is characterized by including a warning alarm generating unit that generates a warning alarm indicating a danger area when a work object is transported, in accordance with the control of the danger area indication control unit.

[0018] Preferably, the above-mentioned work target measuring unit is,

[0019] It is characterized by scanning a work target using an image sensor, extracting external size information from the scanned image, and providing it as work target external information.

[0020] Preferably, the above-mentioned danger area indicator control unit is,

[0021] A measurement information receiving unit that receives measurement information;

[0022] Area-specific classification unit that classifies measurement information received from the above measurement information receiving unit by area of ​​the work target;

[0023] A length calculation unit for each region that calculates the length for each region classified by the above-mentioned region classification unit;

[0024] A danger area marking length calculation unit that calculates a danger area marking length using a laser for the lengths calculated for each area by the above-mentioned area-specific length calculation unit;

[0025] A laser control value calculation unit that calculates a laser control value according to the danger area marking length calculated for each area by the danger area marking length calculation unit above;

[0026] It is characterized by including a display control unit that controls the visual display of a danger area based on the laser control value calculated by the laser control value calculation unit above.

[0027] Preferably, the above-mentioned area-specific classification unit is,

[0028] It is characterized by classifying each face of the work object into a region.

[0029] Preferably, the above-mentioned length calculation unit for each region is,

[0030] It is characterized by calculating the vertical length for the surface classified by the above-mentioned area.

[0031] Preferably, the above-mentioned risk area indication length calculation unit is,

[0032] It is characterized by calculating the laser display length by multiplying the calculated vertical length of each area by two.

[0033] Preferably, the laser control value calculation unit is,

[0034] It is characterized by calculating a laser control value by varying the laser driving voltage or current in correspondence with the calculated laser display length.

[0035] Preferably, the above-mentioned danger area indicator control unit is,

[0036] It is characterized by including a warning output unit that outputs a warning voice and a warning alarm for a danger area calculated by considering the size of the work object during the transfer of the work object.

[0037] Preferably, the above-mentioned danger area visual indicator is,

[0038] It is characterized by visually indicating a danger area by varying the laser length through adjusting the laser driving voltage or current according to the received laser control value.

[0039] In addition, the "portable danger zone indicator device" according to the present invention is,

[0040] A mounting unit that drives a mounted electromagnet to attach a portable danger zone indicator to a work target, and turns off the drive of the electromagnet to detach the portable danger zone indicator from the work target;

[0041] It is characterized by including a power supply unit that supplies driving power using a built-in battery.

[0042] Preferably, the above-mentioned operating unit, work target measuring unit, power supply unit, mounting unit, danger area display control unit, danger area visual display unit, warning voice generating unit, and warning alarm generating unit are mounted on a single body and are characterized by being manufactured to be compact so as to be portable. Effects of the invention

[0043] According to the present invention, a danger area is automatically marked using a laser when transporting a work object (cargo), thereby ensuring safety even in the event of a fall of the transported cargo.

[0044] In addition, by making the danger area indicator portable and using an electromagnet to attach and detach it to the work object, it also has the effect of promoting convenience of use. Brief explanation of the drawing

[0045] FIG. 1 is an example of attaching and using a portable danger zone indicator device according to the present invention to a work object, and FIG. 2 is a block diagram of a portable danger zone indicator device according to a preferred embodiment of the present invention, and Figure 3 is a block diagram of an exemplary embodiment of the danger area display control unit of Figure 1. Specific details for implementing the invention

[0046] A portable danger zone indicator device according to a preferred embodiment of the present invention will be described in detail below with reference to the attached drawings.

[0047] The terms or words used in the present invention described below should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0048] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely preferred embodiments of the present invention and do not represent all technical concepts of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0049] FIG. 1 is an example of mounting and using a portable danger zone indicator (100, 200, 300, 400) according to a preferred embodiment of the present invention on a work target.

[0050] Since the configuration and operation of the portable danger area indicators (100, 200, 300, 400) are identical, only one portable danger area indicator (100) will be described below.

[0051] When a work object being transported using a crane or heavy equipment (1) has a rectangular (cuboid) shape as shown in FIG. 1, a portable danger area indicator (100, 200, 300, 400) is attached to four sides excluding the top and bottom surfaces using an electromagnet at appropriate locations, and then a danger area is indicated using a laser. Here, the portable danger area indicator is shown as being composed of four parts, but this is limited to cases where the work object is a rectangular cuboid; if the work object is triangular, the portable danger area indicator is attached to only three sides excluding the bottom surface. Similarly, if the work object is circular, a safety zone can be formed for the circular work object by selecting an appropriate location and attaching the portable danger area indicator, thereby ensuring safe work.

[0052] In Fig. 1, the explanation will be limited to the portable danger zone indicator (100).

[0053] FIG. 2 is a block diagram of a “portable danger area indicator device (100)” according to the present invention, and may include an operating unit (110), a work target measuring unit (120), a power supply unit (130), a mounting unit (140), a danger area indicator control unit (150), a danger area visual indicator unit (160), a warning voice generating unit (170), and a warning alarm generating unit (180).

[0054] The control unit (110) serves to set functions for the electromagnet driving function and the danger area display. A function setting button is provided in advance, and the function can be easily set by turning it on or off.

[0055] The user may also manually operate the control unit (110) to set the length of the line light, i.e., the working radius (danger area).

[0056] In addition, the user can set situational mode control functions through the control unit (110). For example, depending on the situation, it is possible to set situational modes such as using only line lighting or using line lighting and sound simultaneously, and control is possible according to the set situational mode.

[0057] Here, mode settings, etc., can be set by the user directly operating the mode setting button provided on the control unit (110) manually, or by using a remote control or a smartphone application. When using a remote control, the function set by the user using the remote control is received by utilizing the infrared receiving function provided in advance on the control unit (110) and provided to the danger area display unit (150). When using a smartphone application, the setting and control functions are received through the smartphone application via a Bluetooth module, which is a short-range wireless communication module provided in advance on the control unit (110), and provided to the danger area display unit (150).

[0058] The power supply unit (130) serves to supply driving power for the danger zone indication using a built-in battery. This power supply unit (130) supplies driving power by discharging power charged in the built-in battery, and may use a rechargeable secondary battery for the built-in battery.

[0059] The mounting part (140) drives the mounted electromagnet to attach the portable danger area indicator (100) to the work target, and turns off the drive of the electromagnet to easily detach the portable danger area indicator (100) from the work target.

[0060] The work target measuring unit (120) scans the work target to be transported using heavy equipment and generates work target appearance information.

[0061] Here, the work target measuring unit (120) has an artificial intelligence camera (AI camera) built in, and if a worker or another person approaches within a pre-set work radius (danger area) according to the size of the work target, it detects this and transmits it to the danger area display unit (150).

[0062] In addition, the work target measuring unit (120) can scan the work target using an image sensor such as a camera, and extract external size information from the scanned image to provide as work target external information. The external size information may be information in the length direction of the surface.

[0063] The danger area display control unit (150) generates a danger area visual display control signal to visually display the danger area based on the work target appearance information measured when the danger area display function is set by the operating unit (110), and controls the operation and display length of the laser using the generated visual display control signal.

[0064] As illustrated in FIG. 3, the danger area display control unit (150) may include a measurement information receiving unit (151) that receives measurement information, an area classification unit (152) that classifies the measurement information received from the measurement information receiving unit (151) by area of ​​the work target, an area length calculation unit (153) that calculates the length for each area classified by the area classification unit (152), a danger area display length calculation unit (154) that calculates the danger area display length using a laser for the length calculated by each area by the area length calculation unit (153), a laser control value calculation unit (155) that calculates a laser control value according to the danger area display length calculated by each area by the danger area display length calculation unit (154), a display control unit (156) that controls the danger area visual display based on the laser control value calculated by the laser control value calculation unit (155), and a warning output unit (157) that outputs a warning voice and a warning alarm for the danger area calculated by considering the size of the work target when transporting the work target.

[0065] The above area classification unit (152) can classify each face of the work target into areas, the above area length calculation unit (153) can calculate the vertical length for the face classified by area, and the above danger area marking length calculation unit (154) can calculate the laser marking length by multiplying the calculated vertical length of each area by two.

[0066] In addition, the laser control value calculation unit (155) can calculate a laser control value by varying the laser driving voltage or current in correspondence with the calculated laser display length.

[0067] The danger area visual display unit (160) adjusts the display length of the laser according to the control of the danger area display control unit (150) and serves to visually display the danger area on the ground.

[0068] This danger area visual display unit (160) can visually display the danger area by varying the laser length by adjusting the laser driving voltage or current according to the received laser control value.

[0069] The warning voice generator (170) can emit a warning voice through a speaker (171) indicating a danger area when transporting a work target, in accordance with the control of the danger area indicator control unit (150).

[0070] Additionally, the warning alarm generating unit (180) serves to provide a warning alarm for the danger area when the work object is transported, in accordance with the control of the danger area display control unit (150).

[0071] The control unit (110), work target measuring unit (120), power supply unit (130), mounting unit (140), danger area display control unit (150), danger area visual display unit (160), warning voice generating unit (170), and warning alarm generating unit (180) configured in this manner are mounted on a single body and can be manufactured to be compact so as to be portable.

[0072] The operation of the "portable danger area indicator device (100)" according to the present invention configured as described above is specifically explained as follows.

[0073] First, before attaching the portable danger area indicator (100) to the work target, the user supplies driving power through the power supply unit (130) and sets situational mode control functions, etc. through the control unit (110).

[0074] When driving power is supplied, the work target measuring unit (120) scans the work target. Here, scanning the work target is for automatically setting a danger area, and it is also possible for the user to set the danger area (work radius) through manual operation.

[0075] The aforementioned danger zone refers to an area where a worker or pedestrian could be injured if a connecting link, etc., breaks while transporting a work object using heavy equipment and the work object falls to the ground. Workers or pedestrians working outside the danger zone face no risk of injury even if the work object falls to the ground.

[0076] Here, if the work target is a square shape having a cuboid as shown in FIG. 1, each of the four portable danger area indicators (100) is used to scan only the corresponding side with the indicator device mounted on the corresponding side, excluding the top and bottom surfaces.

[0077] When the scanning function of the surface to be mounted is set, the work target measuring unit (120) scans the mounting surface of the work target to be transported using heavy equipment to generate work target appearance information.

[0078] Here, the mounting surface refers to the surface on which the portable danger area indicator is to be mounted.

[0079] For example, the work target measuring unit (120) scans the work target using an image sensor such as a camera, and extracts external size information from the scanned image using a size information extraction algorithm, and provides this as the work target external size information. Here, the external size information is information in the length direction of the surface, and the one with the longest length direction among the surfaces is provided as the external size information. There may be surfaces of the same size, and there may be surfaces with a height difference. For surfaces of the same size, the external size information can be calculated as a single piece, but for surfaces with a height difference, there may be multiple pieces of external size information in the length direction. In this case, the information with the longest length is set as the external size information.

[0080] When the surface scan of the work target is completed in this way, the user sets the electromagnet driving function through the control unit (110), and accordingly, the danger area display control unit (150) drives the electromagnet equipped in the mounting unit (140) to magnetize it.

[0081] Here, one embodiment of the present invention is described as scanning a work target using an image sensor to measure the vertical length of each side of the work target, but it is not limited to this, and it is also possible for the user to directly input size information (vertical length information) of each work target side through the operation unit (110) instead of the work target measuring unit (120).

[0082] Afterward, when the user contacts the mounting part (140) to the mounting surface, the portable danger area indicator (100) is attached to the mounting surface by an electromagnet.

[0083] Here, most work targets are made of metal, so there is no particular difficulty in attaching the portable danger zone indicator (100) to the work target, but some work targets may not be made of metal. In such cases, a method can be used in which a separate metal body is mounted on the work target and then the portable danger zone indicator (100) is attached to the metal body.

[0084] After mounting the portable danger area indicator (100) at an appropriate location on the work target, the user operates the danger area indicator function through the control unit (110).

[0085] When the danger area display function is set, the danger area display control unit (150) generates a danger area visual display control signal to visually display the danger area based on the measured work target appearance information, and controls the drive and display length of the laser with the generated visual display control signal to automatically create a safety zone, thereby ensuring safety without a signalman.

[0086] For example, the measurement information receiving unit (151) of the danger area display control unit (150) receives measurement information provided from the work target measurement unit (120).

[0087] Next, the area-specific classification unit (152) classifies the measurement information received from the measurement information receiving unit (151) by area of ​​the work target.

[0088] For example, if the work target is a cuboid, measurement information is received for each of the four sides, so it is classified by area. A unique ID is assigned to each actual portable danger area indicator, and when the user installs it on the work target, the user sets which side of the cuboid it is through the control unit (110), so the area classification unit (152) can verify which side of the work target the measurement information is on.

[0089] The measurement information classified by area (length information of the corresponding surface of the work target) is provided to the area length calculation unit (153).

[0090] The above-mentioned area-specific length calculation unit (153) calculates the length for each classified area.

[0091] That is, the vertical length of the surface classified by area is calculated as the length of each area. The area length information calculated in this way is transmitted to the risk area indication length calculation unit (154).

[0092] The above-mentioned danger area marking length calculation unit (154) calculates the danger area marking length using a laser for the length calculated for each area.

[0093] Here, the danger zone marking length is the length at which the work object falls to the ground without causing danger to workers or pedestrians, and the laser marking length is calculated by multiplying the calculated vertical length of each area by two. By setting the laser marking length by multiplying the vertical length of each area by two in this way, a safe zone can be formed even if the work object does not fall straight down to the ground but moves in a different direction while falling.

[0094] Next, the laser control value calculation unit (155) calculates a laser control value according to the danger area display length calculated by the danger area display length calculation unit (154) for each area. Here, the laser control value is a value for adjusting the laser display length and can be a voltage or a current. The laser control value calculation unit (155) can calculate the laser control value by varying the laser driving voltage or current in correspondence with the calculated laser display length.

[0095] The display control unit (156) controls the danger area visual display by transmitting the laser control value to the danger area visual display unit (160) based on the laser control value calculated by the laser control value calculation unit (155).

[0096] The above danger area visual display unit (160) visually displays the danger area on the ground through line lighting by adjusting the display length of the laser according to the control of the danger area display control unit (150).

[0097] In other words, the laser driving voltage or current is adjusted according to the received laser control value to vary the laser length, thereby visually marking the danger area with line lighting.

[0098] In other words, a thick line is marked on the ground with a laser corresponding to the length of the laser to indicate the danger area.

[0099] In this way, four lasers are projected onto the ground for four area surfaces according to the vertical length of the corresponding surface of the work target.

[0100] Here, the laser (line light) displayed on the ground can be continuously lit or flashed using a flashing function. The continuous lighting or flashing of the line light can be set through the control unit (110) or set automatically.

[0101] In addition, the present invention uses a laser to mark a danger area on the ground as described above, and simultaneously outputs a warning voice and a warning alarm for the danger area calculated by considering the size of the work target when transporting the work target through a warning output unit (157).

[0102] The output warning sound is transmitted to the warning sound generating unit (170), and the warning sound generating unit (170) transmits a warning sound through the speaker (171) indicating a danger area when transporting a work target, in accordance with the control of the danger area indication control unit (150). That is, it outputs a warning sound such as "No Access" or "Danger" so that other workers or pedestrians can recognize it.

[0103] Likewise, the warning alarm generating unit (180) generates a warning alarm for the danger area when the work target is transported, in accordance with the control of the danger area display control unit (150), thereby notifying the danger area.

[0104] In this invention, depending on the situational mode control, a danger area can be indicated by using a laser for visual danger area indication, a warning voice, and a warning alarm, or by using a laser for visual danger area indication and a warning voice, or by using a laser for visual danger area indication and a warning alarm.

[0105] Meanwhile, as another feature of the present invention, when the danger area indicator device (100) is installed on the structure, the user can set functions, line lighting length, flashing function, situational mode control function, etc. using a remote control or a smartphone application.

[0106] This enables the control unit (110) to be equipped with an infrared receiving module capable of receiving a remote control signal and / or a Bluetooth module capable of receiving a smartphone signal, and allows the user to conveniently control the function settings and danger area indicator (100) remotely using a remote control or a smartphone application.

[0107] Meanwhile, as another feature of the present invention, an artificial intelligence camera (AI camera) is provided in the work target measuring unit (120), and when operation is started, it continuously detects whether a worker or another person approaches within the work radius (danger area). That is, the AI ​​camera is used to photograph and detect objects within the work radius, and when an object within the work radius is detected, this is transmitted to the danger area display control unit (150).

[0108] The warning output unit (157) within the above-mentioned danger area display control unit (150) generates a warning voice and a warning alarm regarding the danger through the warning voice generation unit (170) and the warning alarm generation unit (180) when a worker or another person approaches within the working radius by the artificial intelligence camera, and automatically stops the crane and / or heavy equipment in an emergency to ensure safety.

[0109] According to the present invention described above, a danger area is automatically marked using a laser when transporting a work object (cargo), thereby ensuring safety even in the event of a fall of the transported cargo.

[0110] In addition, the danger zone indicator is made portable and can be attached to and detached from the work object using an electromagnet, thereby enhancing convenience of use.

[0111] Although the invention made by the inventors has been specifically described according to the above embodiments, it is obvious to those skilled in the art that the invention is not limited to the above embodiments and can be modified in various ways without departing from the gist thereof. Explanation of the symbols

[0112] 100, 200, 300, 400: Portable danger zone indicator 110: Control panel 120: Working object measuring part 130: Power supply 140: Mounting part 150: Danger Area Indication Control Unit 151: Measurement information receiver 152: Classification by Area 153: Length calculation unit by area 154: Risk Area Marking Length Calculation Unit 155: Laser control value calculation unit 156: Display control unit 157: Warning Output Section 160: Danger area visual display 170: Warning voice generator 180: Warning alarm generator

Claims

Claim 1 A control unit for setting functions for an electromagnet driving function and a danger area display; a work target measuring unit that scans a work target to be transported using heavy equipment and generates work target appearance information; a danger area display control unit that generates a danger area visual display control signal to visually display a danger area based on the work target appearance information measured when the danger area display function is set by the control unit, and controls the driving of a laser and the display length using the generated visual display control signal; a danger area visual display unit that visually displays a danger area on the ground by adjusting the display length of a laser, which is a line light, according to the control of the danger area display control unit; a warning voice generating unit that transmits a warning voice through a speaker to indicate a danger area when transporting a work target according to the control of the danger area display control unit; and a warning alarm generating unit that generates a warning alarm indicating a danger area when transporting a work target according to the control of the danger area display control unit, wherein the danger area display control unit comprises: an area classification unit that classifies received measurement information by area of ​​the work target; and an area length calculation unit that calculates the length for each area classified by the area classification unit. A danger area marking length calculation unit that calculates a danger area marking length using a laser for the length calculated for each area by the above-mentioned area-specific length calculation unit; a laser control value calculation unit that calculates a laser control value according to the danger area marking length calculated for each area by the above-mentioned danger area marking length calculation unit;A portable danger area display device comprising: a display control unit that controls the visual display of a danger area based on a laser control value calculated by the laser control value calculation unit; a region classification unit that classifies each face of a work target into a region; a region length calculation unit that calculates the vertical length for the face classified by region; a danger area display length calculation unit that calculates the laser display length by multiplying the calculated vertical length of each region by two; a laser control value calculation unit that calculates a laser control value by varying the laser driving voltage or current in correspondence with the calculated laser display length; and a danger area visual display unit that visually displays the danger area by varying the laser length by adjusting the laser driving voltage or current according to the received laser control value; wherein the operating unit, work target measuring unit, danger area display control unit, danger area visual display unit, warning voice generating unit, and warning alarm generating unit are mounted on a single body and manufactured to be compact for portability. Claim 2 A portable danger area indicator device in claim 1, wherein the work target measuring unit scans a work target using an image sensor, extracts external size information from the scanned image, and provides it as work target external information. Claim 3 delete Claim 4 delete Claim 5 A portable danger area indicator device according to claim 1, characterized by comprising: a mounting part that drives a mounted electromagnet to attach a portable danger area indicator device to a work target and turns off the drive of the electromagnet to detach the portable danger area indicator device from the work target; and a power supply part that supplies driving power using a built-in battery.

Images