Ultrasonic detection blind guiding stick control system

Abstract

The invention discloses an ultrasonic detection blind guiding stick control system, and particularly relates to the technical field of blind guiding sticks, the ultrasonic detection blind guiding stick control system comprises a blind guiding stick, the blind guiding stick comprises a stick rod and a handle, the handle is internally provided with a CPU, a Beidou navigation module, a Bluetooth transceiver module and a sound reminding module, and the side edge of the handle is further provided with a switch button; a storage battery is arranged in the stick rod, and an ultrasonic transmitter and an ultrasonic receiver are arranged at the bottom of the stick rod. The ultrasonic detection blind guiding stick control system is combined with the smart phone, so that a more accurate and intelligent navigation function can be realized. The ultrasonic detection technology can detect surrounding obstacles in real time, it is ensured that a user of the blind guiding stick is prevented from being collided, and travel safety is improved. Meanwhile, through connection with the mobile phone, the system can feed back data detected by ultrasonic waves to the mobile phone application in real time, and more comprehensive path planning and navigation support are provided for the user in combination with the functions of map navigation, voice prompt and the like.

Description

Technical Field

[0001] The invention relates to the field of guide sticks for the blind, and in particular to an ultrasonic detection guide stick control system. Background Art

[0002] Blind or visually impaired people face many challenges in their daily travel, especially in navigating unfamiliar or complex environments. Traditional guide sticks provide physical obstacle detection but lack intelligent auxiliary functions, often relying on the user's experience and memory of the environment. Although some existing guide devices use ultrasonic, infrared and other sensor technologies to detect obstacles ahead, these devices still have problems such as limited detection range, poor environmental adaptability, and lack of personalized navigation support.

[0003] Ultrasonic guide sticks are a common assistive device that uses ultrasonic sensors to detect surrounding objects and feed back their distance to the user, helping the user avoid collisions. However, traditional ultrasonic detection guide sticks can usually only provide simple distance feedback of obstacles, and lack support for complex environmental changes (such as dynamic obstacles, non-rigid obstacles, etc.) and real-time navigation. In addition, traditional guide sticks lack integration with modern smart devices and cannot provide more diversified navigation information and real-time guidance.

[0004] In recent years, with the popularity of smart phones and smart wearable devices, intelligent blind guide systems that combine modern communication and positioning technologies have gradually attracted attention. Smart phones have powerful computing, positioning and navigation capabilities, and can provide more accurate and flexible navigation services for the visually impaired. By combining ultrasonic detection guide sticks with smart phones, it is possible to use the phone's GPS positioning, map navigation, and voice recognition functions to provide more comprehensive and dynamic blind guide support.

[0005] In this context, the guide cane control system based on ultrasonic detection technology combined with the navigation function of smartphones came into being. By utilizing the computing power and navigation system of the mobile phone, combined with ultrasonic sensors to detect obstacles in the surrounding environment in real time, the system can not only provide the obstacle detection function of the traditional guide cane, but also provide accurate path planning and navigation guidance based on the user's real-time location and environmental information. Such systems can effectively improve the travel experience of visually impaired people, improve travel safety and efficiency, and have great application potential, especially in complex or unfamiliar environments.

[0006] Therefore, the existing technology urgently needs a guide stick control system that can combine ultrasonic detection technology with the navigation function of a smartphone, so as to provide basic obstacle detection while also providing more intelligent and personalized navigation services based on the user's real-time location information and destination. Summary of the invention

[0007] The main purpose of the present invention is to provide an ultrasonic detection guide stick control system, which can effectively solve the problem.

[0008] To achieve the above object, the technical solution adopted by the present invention is:

[0009] An ultrasonic detection guide stick control system, the ultrasonic detection guide stick control system comprises a guide stick, the guide stick comprises a stick rod and a handle, the handle has a built-in CPU, a Beidou navigation module, a Bluetooth transceiver module, and a sound reminder module, and a switch button is also provided on the side of the handle; the stick rod has a built-in storage battery, and an ultrasonic transmitter and an ultrasonic receiver are provided at the bottom of the stick rod;

[0010] Specifically, the ultrasonic transmitters are provided in three groups and are arranged at the lower part of the pole. The lower part of the pole is provided with three reflective covers with an angle of 60°. The three ultrasonic transmitters are respectively arranged in the three reflective covers. The ultrasonic receiver is arranged in front of the lower part of the pole.

[0011] Preferably, the signal input ends of the three ultrasonic transmitters are all connected to the signal output end of the CPU, the signal output ends of the three ultrasonic transmitters are all connected to the signal input end of the CPU, the signal input end of the ultrasonic receiver is connected to the signal output end of the CPU, and the signal output end of the ultrasonic receiver is connected to the signal input end of the CPU. The CPU is used to calculate the distance to obstacles directly in front, left front and right front through the time difference between the three ultrasonic transmitters emitting ultrasonic waves and the ultrasonic receiver receiving the reflected ultrasonic waves.

[0012] Preferably, the Beidou navigation module is used to provide the real-time location of the guide stick, and the Bluetooth transceiver module is connected to the user's mobile phone to import real-time maps and user destination information and generate a planned route.

[0013] Preferably, the Bluetooth module is connected to the user's mobile phone or Bluetooth headset to prompt route turning information.

[0014] Preferably, the sound reminder module includes a buzzer. When it is detected that the distance to an obstacle is too close, the buzzer alarms and simultaneously transmits specific obstacle information to the user's mobile phone or user's Bluetooth headset via Bluetooth. The specific obstacle information includes the direction of the obstacle and the distance of the obstacle from the bottom of the pole.

[0015] Preferably, there are three buttons on the handle, the first button is used to control the on-off of the entire guide stick circuit, the second button is used to control the on-off of the sound reminder module circuit, and the third button is used to control the on-off of the Bluetooth transceiver module circuit.

[0016] Preferably, the battery built into the stick is a detachable battery module and a spare battery is provided, and a charging interface is reserved in the middle of the stick.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The ultrasonic detection guide stick control system provided by the present invention can realize a more accurate and intelligent navigation function by combining with a smart phone. The ultrasonic detection technology can detect surrounding obstacles in real time, ensure that the user of the guide stick avoids collisions, and improve travel safety. At the same time, through the connection with the mobile phone, the system can feed back the ultrasonic detection data to the mobile phone application in real time, and provide users with more comprehensive path planning and navigation support by combining map navigation, voice prompts and other functions. This improvement direction not only enhances the functionality of the guide stick and improves the user experience, but also realizes more personalized customization through the mobile phone terminal, meets the navigation needs of users in different environments, and makes the travel of blind people or visually impaired people more convenient, safe and intelligent.

[0019] 2. The present invention makes the power management of the guide stick more flexible and reliable through the reasonable configuration of the detachable battery module, spare battery design and charging interface. This design not only improves the endurance of the device, but also facilitates the maintenance and replacement of the battery by the user, so that the guide stick can provide continuous and stable services in different usage scenarios, while ensuring the user's experience and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a module block diagram of the present invention. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0022] like Figure 1 As shown, the present invention discloses an ultrasonic detection guide stick control system, the ultrasonic detection guide stick control system comprises a guide stick, the guide stick comprises a stick rod and a handle, in the present application, the stick rod and the handle of the guide stick are preferably made of wooden materials, although the relative weight thereof is increased, compared with the use of metal materials, the use of wooden materials can greatly improve the signal transmission effect, while taking into account the user's grip feel and comfort;

[0023] In addition, the handle of the present application has a built-in CPU, Beidou navigation module, Bluetooth transceiver module, and sound reminder module, and a switch button is also provided on the side of the handle; the stick has a built-in battery, and an ultrasonic transmitter and an ultrasonic receiver are provided at the bottom of the stick.

[0024] Specifically, three groups of ultrasonic transmitters are arranged at the lower part of the pole, three reflective covers with an angle of 60° are arranged at the lower part of the pole, the three ultrasonic transmitters are respectively arranged in the three reflective covers, and the ultrasonic receiver is arranged in front of the lower part of the pole.

[0025] The three reflectors are placed closely together to form a 180° coverage area at the front of the pole. The three ultrasonic transmitters are placed on the central axis of the three reflectors. The ultrasonic reflectors reflect the ultrasonic signal to enhance the signal strength and ensure that the signal can generate enough echoes in the target area, which is particularly important for applications such as distance measurement or defect detection. The shape and material of the reflector can optimize the propagation of the signal, making the echo signal clearer and stronger. This makes it easier for the ultrasonic receiver to better receive the rebounded ultrasonic wave, thereby improving the accuracy of detection.

[0026] The signal input ends of the three ultrasonic transmitters are all connected to the signal output end of the CPU, the signal output ends of the three ultrasonic transmitters are all connected to the signal input end of the CPU, the signal input end of the ultrasonic receiver is connected to the signal output end of the CPU, and the signal output end of the ultrasonic receiver is connected to the signal input end of the CPU. The CPU is used to calculate the distance to obstacles in front, left front and right front through the time difference between the three ultrasonic transmitters emitting ultrasonic waves and the ultrasonic receiver receiving the reflected ultrasonic waves.

[0027] Specifically, three ultrasonic transmitters emit ultrasonic signals, which propagate in the air and are reflected when encountering an object. The propagation speed of ultrasonic waves in the air is generally 340 m / s (at normal temperature and pressure). When ultrasonic waves encounter an object, they are reflected back to the sensor. The ultrasonic receiver receives the reflected ultrasonic signal and then calculates the distance according to the following formula:

[0028]

[0029] Where D is the distance between the object and the ultrasonic sensor; V is the speed of sound waves in the air; and T is the time difference between the emission and reception of the ultrasonic wave.

[0030] The Beidou navigation module is used to provide the real-time location of the guide stick. The Bluetooth transceiver module is connected to the user's mobile phone to import real-time maps and user destination information and generate a planned route.

[0031] For example, if the user needs to go to destination A, the user only needs to enter the detailed location of the destination on the mobile phone, then select the walking route, and transmit the information to the guide stick. The Bluetooth module is connected to the user's mobile phone or Bluetooth headset to prompt the route turning information. During use, the Beidou navigation module can locate the user's actual location in real time, and provide location navigation information to guide the user to go straight, turn left or turn right.

[0032] The sound reminder module includes a buzzer. When it is detected that the distance to an obstacle is too close, the buzzer will alarm and transmit the specific obstacle information to the user's mobile phone or user's Bluetooth headset via Bluetooth. The specific obstacle information includes the direction of the obstacle and the distance of the obstacle from the bottom of the pole.

[0033] Combined with the sound reminder module, this application has the following similar usage scenarios: three ultrasonic transmitters detect obstacles in front of the user's left, right and front respectively, and the CPU determines the specific location of the obstacle in front by analyzing the detection results of the three ultrasonic transmitters;

[0034] If an obstacle is detected in the left front, but there is no obstacle in the front and right front, the user is reminded to avoid the obstacle in the left front. If an obstacle is detected in the right front, but there is no obstacle in the front and right front, the user is reminded to avoid the obstacle in the right front. This is a relatively simple application scenario.

[0035] In actual use, it is common for multiple ultrasonic sensors to detect obstacles at the same time. Especially when the obstacle is large, multiple sensors may receive reflected waves at the same time. The following are related solutions:

[0036] 1. Use the shortest distance point as the actual distance measurement;

[0037] In order to reduce the error caused by this situation, a common method is to select the shortest distance measured as the actual distance between the obstacle and the device. This is because large obstacles usually have a shorter distance on one side (for example, the edge of the obstacle is closest to the sensor), while the distance on the other side may be farther due to the shape of the obstacle. In this way, incorrect measurements caused by different positions or shapes of obstacles can be effectively avoided, thereby ensuring safety and measurement accuracy.

[0038] Reason for choosing the shortest distance: Large obstacles usually form a large reflective surface in front of the device or within a certain range. Therefore, the shortest distance point often represents the actual closest position of the obstacle.

[0039] 2. Safety Tips - "There is a large obstacle ahead";

[0040] In the process of detecting obstacles, in addition to accurately measuring the distance, the user's safety must also be considered, especially obstacles that may affect the normal use of the device or cause collisions. For safety reasons, the system can provide safety prompts in the following ways:

[0041] If the system detects that the obstacle is large and its reflected signal may come from multiple sensors or cause interference, the device can trigger a safety warning, such as "There is a large obstacle ahead." This can effectively remind users to avoid it and avoid accidents due to the existence of obstacles.

[0042] Obstacle classification and identification: By analyzing the measurement data of the three sensors, the system can further identify the type and location of obstacles. For example, if the obstacle is a large object placed vertically or horizontally, the system can identify it as "probably a wall or large object" and trigger the corresponding safety prompt.

[0043] The signal data of multiple ultrasonic sensors can be fused and optimized through signal processing algorithms. Common signal fusion methods include:

[0044] Weighted average method: The distances measured by multiple sensors can be weighted and combined with the signal strength or accuracy of different sensors to obtain a more stable distance value.

[0045] Multi-sensor data fusion: Combine the sensor data and optimize the distance value through filtering algorithms (such as Kalman filtering) to suppress errors caused by the complex shape of obstacles.

[0046] In actual application scenarios, there are three buttons set on the handle. The first button is used to control the on-off of the entire guide stick circuit, the second button is used to control the on-off of the sound reminder module circuit, and the third button is used to control the on-off of the Bluetooth transceiver module circuit.

[0047] The battery built into the stick adopts a detachable battery module and a spare battery is prepared, and a charging interface is reserved in the middle of the stick.

[0048] Since the guide stick may be used outdoors, the waterproof design of the charging port needs to be considered to prevent rain or moisture from damaging the battery and circuit. A common practice is to use a waterproof cover or design a strongly sealed port.

[0049] The charging interface can use a standard USB-C interface, which is convenient for users to charge with common charging cables. Wireless charging function can also be considered to further improve convenience and reduce interface loss.

[0050] Through the detachable battery module, backup battery design and reasonable configuration of charging interface, the power management of the guide stick becomes more flexible and reliable. This design not only improves the endurance of the device, but also facilitates the maintenance and replacement of the battery by the user, so that the guide stick can provide continuous and stable services in different usage scenarios, while ensuring the user experience and safety.

[0051] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An ultrasonic detection guide stick control system, the ultrasonic detection guide stick control system comprises a guide stick, the guide stick comprises a stick rod and a handle, characterized in that: The handle has a built-in CPU, Beidou navigation module, Bluetooth transceiver module, and sound reminder module. A switch button is also provided on the side of the handle. The stick has a built-in battery, and an ultrasonic transmitter and an ultrasonic receiver are provided at the bottom of the stick. Specifically, the ultrasonic transmitters are provided in three groups and are arranged at the lower part of the pole. The lower part of the pole is provided with three reflective covers with an angle of 60°. The three ultrasonic transmitters are respectively arranged in the three reflective covers. The ultrasonic receiver is arranged in front of the lower part of the pole.

2. The ultrasonic detection guide stick control system according to claim 1, characterized in that: The signal input ends of the three ultrasonic transmitters are all connected to the signal output end of the CPU, the signal output ends of the three ultrasonic transmitters are all connected to the signal input end of the CPU, the signal input end of the ultrasonic receiver is connected to the signal output end of the CPU, and the signal output end of the ultrasonic receiver is connected to the signal input end of the CPU. The CPU is used to calculate the distance to obstacles in front, left front and right front through the time difference between the three ultrasonic transmitters emitting ultrasonic waves and the ultrasonic receiver receiving the reflected ultrasonic waves.

3. The ultrasonic detection guide stick control system according to claim 1, characterized in that: The Beidou navigation module is used to provide the real-time location of the guide stick, and the Bluetooth transceiver module is connected to the user's mobile phone to import real-time maps and user destination information and generate a planned route.

4. The ultrasonic detection guide stick control system according to claim 3, characterized in that: The Bluetooth module is connected to the user's mobile phone or Bluetooth headset to prompt route turning information.

5. The ultrasonic detection guide stick control system according to claim 1, characterized in that: The sound reminder module includes a buzzer. When it is detected that the distance to an obstacle is too close, the buzzer will alarm and transmit the specific obstacle information to the user's mobile phone or user's Bluetooth headset via Bluetooth. The specific obstacle information includes the direction of the obstacle and the distance of the obstacle from the bottom of the pole.

6. The ultrasonic detection guide stick control system according to claim 1, characterized in that: There are three buttons arranged on the handle, the first button is used to control the on-off of the entire guide stick circuit, the second button is used to control the on-off of the sound reminder module circuit, and the third button is used to control the on-off of the Bluetooth transceiver module circuit.

7. The ultrasonic detection guide stick control system according to claim 1, characterized in that: The storage battery built into the stick adopts a detachable battery module and a spare battery is prepared, and a charging interface is reserved in the middle of the stick.

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