Alarm device

Abstract

This alarm system improves visibility through floor projection and enhances ease of installation through its integrated structure, thereby reducing the accident rate. [Solution] The alarm device comprises an AI camera, a warning projection device integrally connected to the AI ​​camera and projecting a warning line onto the floor surface using illumination, a warning light buzzer that warns with light and sound, and a power line having an external connection terminal that can be connected to the AI ​​camera, the warning projection device, and the warning light buzzer, and that can be connected to a power source.

Description

Technical Field

[0001] The present invention relates to an alarm device.

Background Art

[0002] Development Background Accidents involving pedestrians being hit by forklifts or heavy machinery at factories, logistics warehouses, and construction sites are still serious problems. For example, Non-Patent Document 1 reports the occurrence status of industrial accidents caused by forklifts. According to the labor accident statistics of the Ministry of Health, Labor and Welfare (2023), forklift-related fatal accidents account for 17.0% of the total, and 62.7% of the injured accidents are contact-type accidents such as "being sandwiched / entangled" and "collided". These accidents mainly occur in the manufacturing industry (warehouse / factory sites) and the transportation industry (logistics / cargo handling sites). The number of injured people exceeds 130,000 in total and has been increasing for four consecutive years. On the other hand, although the number of deaths is 755 (19 less than the previous year), the occurrence rate in small business establishments (less than 50 people) is increasing. This is analyzed to be due to fatigue / work peaks concentrated at 14-16 o'clock and 8-10 o'clock by time zone. For example, Patent Document 1 discloses an alarm device for a forklift. In the alarm device for a forklift disclosed in Patent Document 1, it is disclosed that traveling in a state where a movable part (a part that can move up and down for lifting and lowering of goods) is raised is prevented with a simple configuration.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Non-Patent Documents

[0004]

Non-Patent Document 1

[0005] However, conventional alarm systems had the following problems: (1) Ultrasonic and millimeter-wave sensors react to carts, pallets, pillars, cardboard boxes, etc., and malfunctions occur frequently (the main cause of contact accidents). (2) Buzzers and flashing lights have limited effectiveness in noisy environments. (3) Products equipped with AI cameras that utilize artificial intelligence (AI) technology have separate detection and warning projection units, making discrepancies between the detection range and the projection range unavoidable. These challenges, coupled with the increase in unskilled operators due to the Logistics 2024 problem (a 14% possibility of transportation capacity shortages), are leading to an accumulation of near misses (estimated precursors to collisions) and increasing the overall accident risk.

[0006] Therefore, the present invention aims to provide an alarm device that can reduce the accident rate by improving visibility through floor projection and enhancing ease of installation through an integrated structure. [Means for solving the problem]

[0007] An alarm device according to one aspect of the present invention comprises an AI camera, a warning projection device integrally connected to the AI ​​camera and projecting a warning line onto the floor surface using illumination, a warning light buzzer that provides warnings with light and sound, and a power line having an external connection terminal that can be connected to the AI ​​camera, the warning projection device, and the warning light buzzer, and that can be connected to a power source. [Effects of the Invention]

[0008] According to the above embodiment, it is possible to provide an alarm device that can reduce the accident rate by improving visibility through floor projection and enhancing ease of installation through an integrated structure. [Brief explanation of the drawing]

[0009] [Figure 1] A schematic diagram of the alarm device according to the first embodiment. [Figure 2] Wiring diagram of the alarm device according to the first embodiment. [Figure 3] Front view of the integrated structure according to the first embodiment. [Figure 4] Side view in line with arrow IV in Figure 3. [Figure 5] A diagram showing the normal operation according to the first embodiment. [Figure 6] A diagram showing the operation of the AI ​​camera according to the first embodiment when it detects a person. [Figure 7] A schematic diagram of the alarm device according to the second embodiment. [Figure 8] A diagram showing the normal operation according to the second embodiment. [Modes for carrying out the invention]

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the embodiments, as an example of an alarm device, an example of an LED (Light Emitting Diode) linked AI camera sensor (a structure in which the detection unit and the warning projection unit are integrated) configured to be installed on vehicles such as heavy machinery, construction machinery, and forklifts will be given and described.

[0011] In the following explanation, expressions indicating relative or absolute arrangements, such as "parallel," "orthogonal," "centered," and "coaxial," mean not only strictly such arrangements or states, but also include arrangements or states that are relatively displaced by angles or distances that allow for tolerances or similar functions. In the drawings used in the following explanation, the scale of each component may be changed as appropriate to make each component recognizable.

[0012] <First Embodiment> FIG. 1 is a schematic diagram of an alarm device 1 according to the first embodiment. FIG. 2 is a wiring diagram of the alarm device 1 according to the first embodiment. FIG. 3 is a front view of an integrated structure according to the first embodiment. FIG. 4 is a side view taken along arrow IV in FIG. 3. Referring to FIGS. 1 to 4 together, the alarm device 1 includes an AI camera 2, a warning projection device 3, a warning light buzzer 4, and a power line 5.

[0013] In the following description, the orthogonal coordinate system of X, Y, and Z will be used for explanation as necessary. The X direction corresponds to the depth direction (front-rear direction) of the integrated structure (for example, the housing 20). The Y direction corresponds to the width direction (left-right direction) of the integrated structure. The Z direction corresponds to the height direction (up-down direction) of the integrated structure. In the following description, among the X direction, Y direction, and Z direction, the direction of the arrow in the figure is taken as the plus (+) direction, and the direction opposite to the arrow is taken as the minus (-) direction for explanation. The +Z direction corresponds to the upward direction in the vertical direction, and the -Z direction corresponds to the downward direction in the vertical direction.

[0014] The AI camera 2 is equipped with artificial intelligence (AI) and has the function of recording video and images and performing automatic analysis, recognition, and discrimination in real time. The AI camera 2 includes, for example, a detection unit that detects an object, and a control unit (not shown) that performs predetermined control based on the detection result of the detection unit.

[0015] The control unit of the AI camera 2 performs, for example, video and image analysis based on the detection result of the detection unit, identification of the object, pattern recognition of the behavior and situation of people within a predetermined area, cooperation and control with external devices based on the analysis result, and learning and optimization based on predetermined data. For example, the control unit may be built into the AI camera 2. Note that the installation location of the control unit is not limited to the above and can be changed according to the design specifications.

[0016] The angle of view (range that can be photographed) of the AI camera 2 is set to be 90° or more and 180° or less. In this embodiment, the angle of view of the AI camera 2 is set to about 120°. Note that the angle of view of the AI camera 2 may be set to other than the above angles.

[0017] The detection range of AI Camera 2 (the distance at which it can detect an object) is adjustable according to the installation position (e.g., installation height) of AI Camera 2. The detection range of AI Camera 2 can be adjusted within a range of approximately 2m to 12m depending on the installation height. The installation position and detection range of AI Camera 2 have the following correspondence, for example. (1) If the AI ​​camera 2 is installed at a distance of approximately 2m, the detection range of the AI ​​camera 2 will be approximately 6m. (2) If the AI ​​camera 2 is installed at a distance of approximately 3m, the detection range of the AI ​​camera 2 will be approximately 8m. (3) If the AI ​​camera 2 is installed at a distance of approximately 4m, the detection range of the AI ​​camera 2 will be approximately 10m. (4) If the AI ​​camera 2 is installed at a distance of approximately 5m, the detection range of the AI ​​camera 2 will be approximately 12m. Note that the installation location and detection distance of AI camera 2 may have different relationships than those described above.

[0018] The warning projection device 3 projects a warning line WL onto the floor surface 10 using illumination. The warning projection device 3 is integrated with the AI ​​camera 2.

[0019] The warning projection device 3 and the AI ​​camera 2 are integrated into a single structure by a common housing 20 (e.g., an aluminum die-cast integrated housing). The aluminum die-cast integrated housing is manufactured by a die-casting method in which molten aluminum alloy is injected into a mold under high pressure, and then cooled and solidified. In the aluminum die-cast integrated housing, the main parts of the housing (e.g., sides and back) are molded as a single unit without seams.

[0020] By adopting an integrated die-cast aluminum casing, the following advantages are available: (1) High rigidity and strength: The integrated housing reduces the number of parts and seams, improving rigidity and strength against twisting and impact. (2) Excellent heat dissipation: Because aluminum has a higher thermal conductivity than other metals (such as iron), the entire enclosure functions like a heat sink, allowing heat from inside the enclosure to be efficiently released to the outside. (3) Electromagnetic shielding effect: Because the aluminum alloy is integrated into the enclosure, it can suppress the intrusion of electromagnetic noise from outside the enclosure and the leakage of noise from inside the enclosure. (4) Dustproof and waterproof: The integrated housing reduces seams and gaps, resulting in improved airtightness and enhanced dustproof and waterproof performance.

[0021] In the housing 20, a portion of the warning projection device 3 and the AI ​​camera 2 (the lens portion) is exposed to the outside of the housing. The lens portion is made of a thermoplastic plastic such as polycarbonate. However, the lens portion may also be made of a thermoplastic plastic other than polycarbonate or other synthetic resin material.

[0022] The housing 20 is installed in a predetermined location via brackets 21, etc. The brackets 21 are attached to the left and right sides (Y-direction sides) of the housing 20. A pair of brackets 21 are provided, one on the left and one on the right. The brackets 21 are made of an alloy such as stainless steel. However, the brackets 21 may be made of an alloy other than stainless steel or other metals.

[0023] The housing 20 is attached to its left and right sides via a plurality of pins 22, 23 (e.g., support pins 22 and guide pins 23). The support pins 22 and guide pins 23 each protrude outward in the Y direction from the left and right sides of the housing 20. The housing 20 is rotatably supported about the support pins 22 as its central axis. The housing 20 has an arc-shaped guide hole 21h formed in it when viewed from the side. The guide pins 23 are located inside the guide hole 21h.

[0024] The housing 20 is rotatable within a predetermined angular range (with the support pin 22 as the central axis) while the bracket 21 is fixed in place. In the example shown in Figures 3 and 4, the housing 20 is rotatable within a predetermined angular range around an axis parallel to the Y direction while the bracket 21 is fixed in place. This allows for adjustment of the orientation of the integrated structure (integrated structure) in which the AI ​​camera 2 and the warning projection device 3 are integrally connected.

[0025] In this embodiment, the warning projection device 3 projects a straight line as the warning line WL. The warning projection device 3 includes a straight-line type LED line light 30.

[0026] The compatible colors (switchable colors) for the straight-line type LED line light 30 are, for example, blue, green, red, and red & blue. The straight-line type LED line light 30 may also be switchable to multiple colors (for example, two colors). For example, a configuration that allows switching between two colors may be set as an optional part for the straight-line type LED line light 30.

[0027] The warning light buzzer 4 has the function of providing warnings with light and sound. The warning light buzzer 4 includes, for example, an LED chip and a buzzer. The warning light buzzer 4 is, for example, a rotating warning light with a built-in buzzer.

[0028] The warning light buzzer 4 has, for example, four types of flashing patterns. The warning light buzzer 4 is designed so that the flashing pattern can be switched manually. The warning light buzzer 4 can switch between flashing (high speed) / flashing (low speed) / double flashing / rotating light as flashing patterns. The warning light buzzer 4 may also have flashing patterns other than those listed above.

[0029] The warning light buzzer 4 is designed to allow manual switching of sound patterns. The warning light buzzer 4 can switch between buzzer sounds such as a beeping sound, a warning to the right, a warning to the left, and a warning to the rear. The warning light buzzer 4 may also have sound patterns other than those listed above.

[0030] The power line 5 has external connection terminals 51 to 54 that can be connected to the AI ​​camera 2, warning projection device 3, warning light buzzer 4, etc. The power line 5 can be connected to a power source (e.g., power supply unit 7). The power line 5 can be connected to an external output 8.

[0031] External connection terminals 51 to 54 include a first connection terminal 51 that can be connected to the AI ​​camera 2, a second connection terminal 52 that can be connected to the warning projection device 3, a third connection terminal 53 that can be connected to the warning light buzzer 4, and a fourth connection terminal 54 that can be connected to the external output 8.

[0032] In this embodiment, the system further includes a power supply (e.g., a power supply unit 7) and a DC converter 6 that can be connected to the vehicle 9. The DC converter 6 has the function of converting a direct current (DC) voltage to another DC voltage. The DC converter 6 has the role of increasing (boosting), decreasing (stepping down), or keeping the voltage constant. The DC converter 6 can generate the voltage required for each component of the alarm device 1 from the battery of the vehicle 9.

[0033] The power supply (for example, power supply unit 7) can be connected to the vehicle 9 via a DC converter 6. The DC converter 6 is designed to handle voltages from approximately 12V to 48V. However, the DC converter 6 may also be designed to handle voltages other than those mentioned above.

[0034] Figure 5 shows the normal operation according to the first embodiment. Figure 6 shows the operation when the AI ​​camera 2 according to the first embodiment detects a person. Referring to Figures 5 and 6, the alarm device 1 normally keeps the warning line WL constantly illuminated. When the AI ​​camera 2 detects an object that resembles a person, it immediately flashes the warning line WL, flashes the light of the warning light buzzer 4, and emits an audible warning. Objects that resemble a person include people themselves, objects that mimic the shape of a person (for example, humanoid robots, etc.).

[0035] In the examples shown in Figures 5 and 6, the integrated structure (including the AI ​​camera 2 and the warning projection device 3) is installed on top of the forklift. Note that this integrated structure is not limited to forklifts; it may also be installed in logistics warehouses, construction sites, or other heavy machinery.

[0036] Alarm device 1 has, for example, the following functions (main functions): (1) When the AI ​​camera 2 detects a person, the LED line light 30 will turn on in conjunction. (2) When the LED line light 30 is activated, it will flash and a buzzer will sound, so that the surrounding area and the operator will be notified. (3) In the case of the two-color switching model, the color switches when AI camera 2 detects something.

[0037] In the example shown in Figure 5, the alarm device 1 normally keeps a straight-line type LED line light 30, which projects a straight line as a warning line WL, constantly illuminated. Normally, this means when the AI ​​camera 2 does not detect an object that resembles a person. In the example shown in Figure 5, this occurs when the AI ​​camera 2 detects a trolley, and when a trolley is detected, the straight-line type LED line light 30 is kept constantly illuminated.

[0038] In the example shown in Figure 6, when the AI ​​camera 2 detects a person, the alarm device 1 immediately flashes the straight-line type LED line light 30, flashes the light of the warning light buzzer 4, and provides an audible warning. When the AI ​​camera 2 detects a person, it corresponds to when a person enters the field of view of the AI ​​camera 2. The field of view of the AI ​​camera 2 is set to the area inside the boundary line BL (the area on the vehicle 9 side), for example, with the straight line (outer edge) of the straight-line type LED line light 30 as the boundary line BL.

[0039] In this embodiment, when the AI ​​camera 2 detects an object that resembles a person, it immediately issues a warning (triple warning) by flashing the warning line WL (LED flashing), flashing the light of the warning light buzzer 4, and sounding an audible alarm (warning light flashing and buzzer sound). This logic significantly reduces malfunctions (object reactions) of conventional sensors and ensures visibility through projection onto the floor surface 10 even in noisy environments.

[0040] Traditionally, while sensor products and LED line light products have existed on the market as individual products, combined products have not yet been available. In conventional technology, sensor products, for example, are ultrasonic sensors mounted on vehicles to detect distance and alert the surroundings or the operator. Similarly, LED line light products, for example, are mounted on the top of vehicles to illuminate the surroundings, drawing lines and drawing the attention of pedestrians. However, because they react to both people and objects, malfunctions and a lack of attention due to habituation have been problematic.

[0041] In contrast, in this embodiment, as a solution to the above problem, a product combining an AI camera 2 and an LED line light 30 (straight-line type LED line light) is used, which is specialized in responding to people and can alert the surroundings and the operator.

[0042] <Effects and Effects> As described above, the alarm device of this embodiment (for example, alarm device 1 in the embodiment) comprises an AI camera (for example, AI camera 2 in the embodiment), a warning projection device (for example, warning projection device 3 in the embodiment) which is integrally connected to the AI ​​camera and projects a warning line (for example, warning line WL in the embodiment) onto the floor surface (for example, floor surface 10 in the embodiment) using illumination, a warning light buzzer (for example, warning light buzzer 4 in the embodiment) which warns with light and sound, and a power line (for example, power line 5 in the embodiment) which has external connection terminals (for example, external connection terminals 51 to 54 in the embodiment) that can be connected to the AI ​​camera, the warning projection device, and the warning light buzzer, and can be connected to a power supply (for example, power supply unit 7 in the embodiment). This configuration allows for improved visibility through floor projection by projecting warning lines onto the floor surface using a warning projection device and lighting. Furthermore, by integrating the AI ​​camera and the warning projection device, discrepancies between the detection range and the projection range can be suppressed compared to cases where the detection unit and warning projection unit are separate. This enhances ease of installation through an integrated structure. Therefore, by improving visibility through floor projection and enhancing ease of installation through an integrated structure, the accident rate can be reduced.

[0043] In this embodiment, under normal circumstances, the warning line is kept constantly illuminated. When the AI ​​camera detects an object that resembles a person, the warning line flashes, the warning light buzzer flashes, and an audible warning is immediately issued. This configuration significantly reduces malfunctions of conventional sensors (e.g., object detection) and ensures visibility through floor projection even in noisy environments.

[0044] In this embodiment, the warning projection device projects a straight line (for example, the straight line of the straight-line type LED line light 30 in the embodiment) as the warning line. With this configuration, by projecting a straight line as a warning line, visibility can be ensured through floor projection even in noisy environments.

[0045] In this embodiment, the system further includes a DC converter (for example, DC converter 6 in the embodiment) that can be connected to the power supply and the vehicle (for example, vehicle 9 in the embodiment). This configuration allows for the use of a DC converter to handle the vehicle's voltage.

[0046] If the alarm device according to this embodiment is designed, for example, to target contact accidents caused by forklifts (62.7% of fatal and injury accidents), the following effects can be expected. (1) Significant reduction in false alarms: Compared to conventional ultrasonic and millimeter-wave sensors, it reacts only to shapes similar to people, minimizing false alarms caused by objects in the factory (e.g., carts, pallets, etc.) and improving work efficiency. As a result, it helps prevent the accumulation of near misses and contributes to reducing the rate of contact accidents. (2) Improved visibility and attention-grabbing ability: The combination of a high-brightness warning line on the floor (constant illumination → flashing), a 104dB buzzer, and a rotating light allows pedestrians to immediately recognize danger even in noisy environments. For example, it is effective in preventing accidents concentrated during certain times of the day (e.g., 2pm to 4pm). (3) Excellent ease of installation: Installation takes only 5 minutes with just one wire and magnetic / screw fastening, and it can be used for rear and side access. It can be immediately introduced in workplaces with an increasing number of unskilled operators (e.g., small and medium-sized warehouses, construction companies, etc.). (4) Overall risk reduction: For forklift-related accidents, which account for 17.0% of fatal accidents, it is possible to provide early warnings for contact-type accidents that precede tipping and falling (35.2%). For example, it directly leads to the prevention of incidents such as falls while working on pallets (15 cases in total over 5 years). Furthermore, in the pilot program, there were cases where near-miss reports at the implementation sites decreased by 20-30%, and it is expected to contribute to a reduction in the overall accident rate.

[0047] <Second Embodiment> Figure 7 is a schematic diagram of the alarm device 201 according to the second embodiment. Figure 8 is a diagram showing the normal operation according to the second embodiment. The alarm device 201 according to the second embodiment will now be described with reference to Figures 7 and 8. In the configuration shown in Figures 7 and 8, components similar to those in the above-described embodiment are denoted by the same reference numerals, and their detailed descriptions are omitted.

[0048] Referring to Figures 7 and 8, the alarm device 201 comprises an AI camera 202, a warning projection device 203, a warning light buzzer 4, a power line 5, and a DC converter 6.

[0049] In this embodiment, the AI ​​camera 202 and the warning projection device 203 are integrated into a single structure by a plurality of fixing members 221, 222, etc. The plurality of fixing members 221, 222 include a first fixing member 221 which consists of a bracket or the like for fixing the AI ​​camera 202 in a fixed position, and a second fixing member 222 which consists of a bracket or the like for fixing the warning projection device 203 in a fixed position. The first fixing member 221 and the second fixing member 222 may be configured to be detachable from each other.

[0050] For example, the AI ​​camera 202 is rotatable within a predetermined angular range around a predetermined axis (for example, around an axis parallel to the Y direction) while the first fixing member 221 is fixed in place. For example, the warning projection device 203 is rotatable within a predetermined angular range around a predetermined axis (for example, around an axis parallel to the Y direction) while the second fixing member 222 is fixed in place. This makes it possible to adjust the orientation of the integrated structure in which the AI ​​camera 202 and the warning projection device 203 are connected.

[0051] In this embodiment, the warning projection device 203 projects a semicircular or arc-shaped line as the warning line WL. The warning projection device 203 includes a semicircular line-type LED line light 230.

[0052] The semi-circular line-type LED line light 230 is available in the following colors (switchable colors): blue, green, and red. The semi-circular line-type LED line light 230 may also be switchable to multiple colors (for example, two colors). For example, a configuration that allows switching between two colors may be offered as an optional component for the semi-circular line-type LED line light 230.

[0053] In the example shown in Figure 8, the integrated structure (including the AI ​​camera 202 and the warning projection device 203) is installed on top of the forklift. Note that the above integrated structure is not limited to forklifts; it may also be installed in logistics warehouses, construction sites, or other heavy machinery.

[0054] In the example shown in Figure 8, the alarm device 201 normally keeps a semicircular line-type LED line light 230 constantly illuminated, which projects a semicircular or arc-shaped line as a warning line WL.

[0055] Although not shown in the diagram, when the AI ​​camera 202 detects a person, the alarm device 201 immediately flashes the semicircular line-shaped LED line light 230, flashes the light of the warning light buzzer 4, and provides an audible warning. When the AI ​​camera 202 detects a person, it corresponds to when a person enters the field of view of the AI ​​camera 202. The field of view of the AI ​​camera 202 is set to the area inside the boundary line BL (the area on the vehicle side), for example, with the tangent line at a predetermined position on the arc (outer edge) of the semicircular line-shaped LED line light 230 as the boundary line BL.

[0056] In this embodiment, when the AI ​​camera 202 detects an object with a shape similar to a person, it immediately issues a warning (triple warning) by flashing the warning line WL (LED flashing), flashing the light of the warning light buzzer 4, and sounding it (warning light flashing and buzzer activation). This logic significantly reduces malfunctions (object reactions) of conventional sensors and ensures visibility through floor projection even in noisy environments. Furthermore, in this embodiment, by combining the AI ​​camera 202 with the LED line light 230 (semi-circular line-type LED line light), it becomes possible to specialize in responding to people and to draw attention to the surroundings and the operator.

[0057] As described above, in this embodiment, the warning projection device projects a semicircular or arc-shaped line (for example, the arc of the semicircular line type LED line light 230 in the embodiment) as the warning line. With this configuration, by projecting a semi-circular or arc-shaped line as a warning line, visibility can be ensured through floor projection even in noisy environments.

[0058] <Variation> In the embodiments described above, the warning line is normally kept lit, and when the AI ​​camera detects an object with a shape similar to a person, the warning line flashes, the warning light buzzer flashes, and an audible warning is immediately issued. However, the invention is not limited to this example. For example, when the AI ​​camera detects an object with a shape similar to a person, it is not necessary to immediately issue a warning by flashing the warning line. For example, when the AI ​​camera detects an object with a shape similar to a person, it is possible to immediately issue a warning by flashing the warning light buzzer and an audible warning. The manner in which the AI ​​camera issues a warning when it detects an object with a shape similar to a person can be changed according to the design specifications.

[0059] In the embodiments described above, an example was given in which a DC converter connectable to the power supply and the vehicle is further provided, but the invention is not limited to this. For example, the alarm device does not need to include a DC converter connectable to the power supply and the vehicle. The installation configuration of the DC converter connectable to the power supply and the vehicle can be changed according to the design specifications.

[0060] Furthermore, a program for realizing some or all of the functions of the control device in this invention (for example, the control unit of an AI camera) may be recorded on a computer-readable recording medium, and all or part of the processing performed by the control device may be performed by loading the program recorded on this recording medium into a computer system and executing it. Herein, "computer system" includes hardware such as an OS and peripheral devices. Furthermore, "computer system" also includes a WWW system equipped with a homepage provisioning environment (or display environment). Furthermore, "computer-readable recording medium" refers to portable media such as flexible disks, magneto-optical disks, ROMs, CD-ROMs, and storage devices such as hard disks built into a computer system. In addition, "computer-readable recording medium" also includes volatile memory (RAM) inside a computer system that acts as a server or client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line, which holds the program for a certain period of time.

[0061] Furthermore, the above program may be transmitted from a computer system that stores the program in a memory device or the like to another computer system via a transmission medium or by transmission waves within the transmission medium. Here, the "transmission medium" for transmitting the program refers to a medium that has the function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. Furthermore, the above program may be for the purpose of realizing a part of the functions described above. Moreover, it may be a so-called differential file (differential program) that can realize the functions described above in combination with a program already recorded in the computer system.

[0062] Although embodiments of the present invention have been described above, the present invention is not limited to these, and additions, omissions, substitutions, and other modifications to the configuration are possible without departing from the spirit of the present invention, and the above embodiments can be combined as appropriate. [Explanation of symbols]

[0063] 1,201…Alarm device, 2,202…AI camera, 3,203…Warning projection device, 4…Warning light buzzer, 5…Power line, 6…DC converter, 7…Power unit (power supply), 9…Vehicle, 10…Floor, 51~54…External connection terminals, WL…Warning line

Claims

1. AI camera and, A warning projection device is integrally connected to the aforementioned AI camera and projects warning lines onto the floor surface using illumination. A warning light and buzzer that warns with light and sound, The AI ​​camera, the warning projection device, and the warning light buzzer have external connection terminals that can be connected to them, and the device also has a power line that can be connected to a power source. Alarm device.

2. Under normal circumstances, the aforementioned warning line will remain illuminated. When the AI ​​camera detects an object that resembles a person, it immediately flashes the warning line, flashes the warning light and buzzer, and makes an audible warning. The alarm device according to claim 1.

3. The warning projection device projects a straight line as the warning line. The alarm device according to claim 1 or 2.

4. The warning projection device projects a semicircular or arc-shaped line as the warning line. The alarm device according to claim 1 or 2.

5. The system further comprises the aforementioned power supply and a DC converter that can be connected to the vehicle. The alarm device according to claim 1 or 2.

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