Street-crossing auxiliary device for visually impaired people

Abstract

The utility model provides a crossing auxiliary device for visually impaired people, which relates to the technical field of traffic auxiliary devices and comprises a shell, a camera, an auxiliary monitoring sensor, a voice broadcast module and a trigger switch are arranged on the shell, and a power supply and a control mainboard are arranged in the shell. The camera, the auxiliary monitoring sensor, the voice broadcast module and the trigger switch are respectively in signal connection with the control mainboard, the power supply is used for supplying power to the camera, the voice broadcast module and the control mainboard, the camera is used for shooting intersection traffic light images, and the auxiliary monitoring sensor is used for monitoring pedestrian crossing traffic flow. According to the utility model, through combination of traffic light state identification and traffic flow detection, street-crossing auxiliary guidance is provided for visually impaired people, so that the safety risk of street crossing of the visually impaired people is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to traffic auxiliary device technical field especially, it relates to a kind of street-crossing auxiliary devices for visually impaired. BACKGROUND

[0002] Whether a city has barrier-free facilities directly reflects the degree of civilization and humanistic care of the city. Providing street-crossing guidance for the blind is an important part of building an inclusive city, reflecting the concern and respect of society for all members. Existing street-crossing auxiliary equipment usually only provides voice prompts to visually impaired people who need to cross the street based on the current state of the traffic light. In the event of abnormal or unexpected situations, it may not provide reliable assistance information, leading to misjudgment of the traffic status at the intersection by visually impaired people, thereby creating a safety hazard. SUMMARY

[0003] The utility model aims to provide a kind of street-crossing auxiliary devices for visually impaired people, which provides street-crossing assistance guidance for visually impaired people by combining traffic light state recognition and traffic flow detection, further reducing the safety risk of visually impaired people crossing the street.

[0004] To achieve the above-mentioned purpose, the utility model provides a kind of street-crossing auxiliary devices for visually impaired people, the device includes a shell, a camera, an auxiliary monitoring sensor, a voice broadcast module and a trigger switch are provided on the shell, a power supply and a control mainboard are provided in the shell, the camera, the auxiliary monitoring sensor, the voice broadcast module, the trigger switch are respectively connected with control mainboard signal, the power supply is used to power the camera, the voice broadcast module and the control mainboard, the camera is used to shoot the image of the traffic light at the intersection, the auxiliary monitoring sensor is used to monitor the traffic flow of pedestrian crossing.

[0005] Further, the auxiliary monitoring sensor is an infrared distance measuring sensor or a millimeter wave radar.

[0006] Further, the trigger switch includes a pyroelectric sensor and a fixed box with one side open, an opening is provided on the shell, the fixed box is arranged at the opening, the open side of the fixed box faces outward and is provided with a transparent cover plate, the pyroelectric sensor is arranged in the fixed box, and the sensing end of the pyroelectric sensor faces the side where the transparent cover plate is located, and the pyroelectric sensor is connected with the control mainboard signal.

[0007] Further, the shell further comprises a communication module, and the communication module is connected with the control mainboard signal.

[0008] Further, the device further comprises a power management chip, the power management chip is connected with the power supply, and the control mainboard is connected with the power management chip signal.

[0009] Further, the device further comprises a sound sensor connected with the control mainboard signal.

[0010] Further, the camera lens is provided with a light shield in front.

[0011] Further, the voice broadcast module comprises a power amplifier and a loudspeaker, the input end of the power amplifier is connected with the control mainboard, and the output end of the power amplifier is connected with the loudspeaker.

[0012] Compared with the prior art, the device has the beneficial effects that:

[0013] The auxiliary device for the visually impaired to cross the street provided by the utility model, through the camera shooting the traffic light image and transmitting to the control mainboard, the control mainboard identifies the traffic light state through the running traffic light image recognition software of the present technology which is very mature, and the device also monitors the pedestrian crossing traffic through the auxiliary monitoring sensor, when the traffic light state is that the pedestrian can pass, and there is no traffic on the pedestrian crossing, the device prompts the visually impaired to cross the street through the voice broadcast module, thereby providing the visually impaired with safer crossing guidance, and further reducing the safety risk of the visually impaired crossing the street. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only preferred embodiments of the utility model, and for the ordinary skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0015] Figure 1 It is the overall structure section schematic view of the auxiliary device for the visually impaired to cross the street provided by the utility model embodiment.

[0016] Figure 2 It is the circuit connection principle schematic view of the auxiliary device for the visually impaired to cross the street provided by the utility model embodiment.

[0017] In the drawing, 1 is a shell, 2 is a camera, 3 is an auxiliary monitoring sensor, 4 is a voice broadcast module, 5 is a power supply, 6 is a control mainboard, 7 is a pyroelectric sensor, 8 is a fixed box, 9 is a transparent cover plate, 10 is a power management chip, 11 is a sound sensor, and 12 is a light shield. DETAILED DESCRIPTION

[0018] The principles and characteristics of the utility model are described below in combination with the drawings, and the enumerated embodiments are only used to explain the utility model and are not used to limit the scope of the utility model.

[0019] Referring to Figure 1The embodiment provides a crossing assisting device for the visually impaired, which comprises a shell 1, a camera 2, an auxiliary monitoring sensor 3, a voice broadcast module 4 and a trigger switch arranged on the shell 1. A power supply 5 and a control mainboard 6 are arranged in the shell 1. The camera 2, the auxiliary monitoring sensor 3, the voice broadcast module 4 and the trigger switch are respectively connected with the control mainboard 6 in signal, and the power supply 5 is used for supplying power for the camera 2, the voice broadcast module 4 and the control mainboard 6. The camera 2 is used for shooting the image of a traffic light at a road crossing, and the auxiliary monitoring sensor is used for monitoring the vehicle flow on a pedestrian crossing.

[0020] In the embodiment, after the visually impaired person approaches the device, the device can be triggered through the trigger switch. After the trigger switch is triggered, a signal is sent to the control mainboard 6. At this time, the control mainboard 6 collects the image of the traffic light at the road crossing through the camera 2, and identifies the image of the traffic light through the existing traffic light image recognition software, so as to judge whether the current state of the traffic light is a state in which pedestrians can pass. At the same time, the control mainboard 6 also monitors whether there is vehicle flow on the pedestrian crossing through the auxiliary monitoring sensor 3. When the state of the traffic light is that pedestrians can pass, and there is no vehicle flow on the pedestrian crossing, the control mainboard 6 controls the voice broadcast module 4 to broadcast a voice prompt that the visually impaired person can cross the street at this time, for example, "green light, can walk together". When the state of the traffic light is that pedestrians cannot pass, the control mainboard 6 controls the voice broadcast module 4 to broadcast a voice prompt that the visually impaired person cannot cross the street at this time, for example, "red light, please wait". When the state of the traffic light cannot be identified, or there is vehicle flow on the pedestrian crossing, the control mainboard 6 controls the voice broadcast module 4 to broadcast a voice prompt that the visually impaired person cannot cross the street at this time, for example, "there are vehicles passing through the road crossing, please wait". The device can be installed near the traffic light or the waiting area for pedestrians crossing the street, so as to ensure that the passing guide information can be accurately broadcasted.

[0021] As a possible implementation manner, the auxiliary monitoring sensor 3 is an infrared distance sensor or a millimeter wave radar. The infrared distance sensor uses infrared light for distance measurement, and has the advantages of small size, low power consumption and fast response speed, but is easily disturbed by other infrared sources. The millimeter wave radar is a device that uses short-wavelength electromagnetic waves for detection, and can provide high distance and speed resolution, so that it can accurately detect the distance and relative speed of the target object, and accurately distinguish multiple adjacent targets even in a complex environment. Through the millimeter wave radar, whether there is a vehicle on the pedestrian crossing can be accurately measured in various environments. Specifically, the control mainboard 6 measures whether the distance between the object in the direction of the pedestrian crossing and the device is less than a preset distance threshold through the millimeter wave radar, so as to judge whether there is a vehicle on the pedestrian crossing, so as to realize the detection of the vehicle flow, and thus the visually impaired person can be guided to cross the street safely even in the case that the traffic light signal is abnormal or faulty and there is a vehicle passing through the pedestrian crossing. The preset distance threshold can be the distance from the device to the sidewalk opposite the road.

[0022] As a possible implementation, the trigger switch comprises a pyroelectric sensor 7 and a fixed box 8 with one side open, and the shell 1 is provided with an opening, and the fixed box 8 is arranged at the opening, the open side of the fixed box 8 faces the outside of the shell 1 and is provided with a transparent cover plate 9, and the pyroelectric sensor 7 is arranged in the fixed box 8, and the sensing end of the pyroelectric sensor 8 faces the side where the transparent cover plate 9 is located, and the pyroelectric sensor 7 is connected with the control mainboard 6.

[0023] In this embodiment, the trigger switch adopts a non-contact triggering mode. When the hand of a visually impaired person sweeps near the trigger switch, the pyroelectric sensor 7 will sense the infrared radiation emitted by the human body and send a signal to the control mainboard 6 to complete the triggering. By using the trigger switch with the above structure, the visually impaired person or pedestrian can trigger the device without directly contacting the trigger switch, thereby avoiding the bacterial infection that may be caused by multiple people contacting the surface of the trigger switch.

[0024] In another embodiment, the shell 1 of the device is further provided with a communication module, and the communication module is connected with the control mainboard 6. The visually impaired person can establish a communication connection with the communication module through a mobile phone or other equipment with communication function, so as to send a trigger signal to the control mainboard 6. This embodiment provides another option for the visually impaired person to trigger the device.

[0025] As another possible implementation, the device further comprises a power management chip 10, the power management chip 10 is connected with the power supply 5, and the power management chip 10 is connected with the control mainboard 6.

[0026] In this embodiment, the power management chip 10 is used to control the power supply 5 to enter a sleep state when the device is not triggered for a long time. Specifically, when the duration that the control mainboard 6 does not receive the trigger signal sent by the trigger switch exceeds the preset time, a signal is sent to the power management chip 10, and the power management chip 10 controls the power supply 5 to enter a sleep state after receiving the signal, thereby achieving the effect of energy saving.

[0027] As another possible implementation, the device further comprises a sound sensor 11, and the sound sensor 11 is connected with the control mainboard 6. The sound sensor 11 is used to detect the ambient sound of the surrounding environment and send a corresponding detection signal to the control mainboard 6, so that the control mainboard 6 can adjust the broadcast volume of the voice broadcast module 4 according to the ambient sound of the surrounding environment. For example, when the surrounding environment is relatively noisy, the control mainboard 6 controls the voice broadcast module 4 to amplify the volume, so that the visually impaired person can still clearly hear the crossing guide voice in the noisy environment.

[0028] As another possible implementation, a lens hood 12 is provided in front of the lens of the camera 2. The lens hood 12 can reduce glare, improve the contrast and color of the images captured by the camera, and protect the camera lens from damage and prevent stray light from entering the lens. The lens hood 12 can also reduce the damage to the camera caused by dust, rain, snow and other external factors.

[0029] In some embodiments, the voice broadcast module 4 includes a power amplifier and a speaker, the input end of the power amplifier is connected to the control mainboard 6, and the output end of the power amplifier is connected to the speaker. The function of the power amplifier is to amplify the weak audio signal and generate a large enough current to drive the speaker to play back the sound. For example, the power amplifier can be of LPA2101 model, which is suitable for applications requiring high-quality audio output and various protection functions. When the power amplifier receives the audio signal from the control mainboard 6, it broadcasts through the speaker.

[0030] It can be understood that in the above embodiments, specific models of various electronic components are not illustrated, and those skilled in the art can use existing known models on the market according to actual needs.

[0031] The above description is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A device for assisting a visually impaired person to cross a street, characterized in that, The device comprises a shell, a camera, an auxiliary monitoring sensor, a voice broadcast module and a trigger switch are arranged on the shell, a power supply and a control mainboard are arranged in the shell, the camera, the auxiliary monitoring sensor, the voice broadcast module and the trigger switch are respectively connected with the control mainboard, the power supply is used for supplying power for the camera, the voice broadcast module and the control mainboard, the camera is used for shooting the image of the traffic light at the intersection, and the auxiliary monitoring sensor is used for monitoring the vehicle flow on the pedestrian crossing.

2. The crossing aid for the visually impaired according to claim 1, characterized in that The auxiliary monitoring sensor is an infrared distance measuring sensor or a millimeter wave radar.

3. The crossing aid for the visually impaired according to claim 1, characterized in that, The trigger switch comprises a pyroelectric sensor and a fixed box with one side open, an opening is arranged on the shell, the fixed box is arranged at the opening, the open side of the fixed box faces the outside of the shell and is provided with a transparent cover plate, the pyroelectric sensor is arranged in the fixed box, the sensing end of the pyroelectric sensor faces the side where the transparent cover plate is located, and the pyroelectric sensor is connected with the control mainboard.

4. The crossing aid for the visually impaired according to claim 1, characterized in that, A communication module is further arranged in the shell, and the communication module is connected with the control mainboard.

5. The crossing aid for the visually impaired according to claim 1, characterized in that, The device further comprises a power management chip, the power management chip is connected with the power supply, and the control mainboard is connected with the power management chip.

6. The crossing aid for the visually impaired according to claim 1, characterized in that, The device further comprises a sound sensor, and the sound sensor is connected with the control mainboard.

7. The crossing aid for the visually impaired according to claim 1, characterized in that, An optical shield is arranged in front of the lens of the camera.

8. The crossing aid for the visually impaired according to claim 1, characterized in that, The voice broadcast module comprises a power amplifier and a loudspeaker, the input end of the power amplifier is connected with the control mainboard, and the output end of the power amplifier is connected with the loudspeaker.

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