CN111609865B - Assembly type automatic navigation blind road system based on wireless network - Google Patents
Assembly type automatic navigation blind road system based on wireless network Download PDFInfo
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- CN111609865B CN111609865B CN202010449685.3A CN202010449685A CN111609865B CN 111609865 B CN111609865 B CN 111609865B CN 202010449685 A CN202010449685 A CN 202010449685A CN 111609865 B CN111609865 B CN 111609865B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/3407—Route searching; Route guidance specially adapted for specific applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/20—Instruments for performing navigational calculations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/28—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network with correlation of data from several navigational instruments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/36—Input/output arrangements for on-board computers
- G01C21/3626—Details of the output of route guidance instructions
- G01C21/3629—Guidance using speech or audio output, e.g. text-to-speech
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Abstract
The invention provides an assembled automatic navigation blind road system based on a wireless network, which comprises: the system comprises a blind road, an electronic induction system, a voice device and a data processing background; the blind road is arranged on the road; the electronic induction system is arranged on the blind road and used for acquiring the walking path information of the user; the voice device is connected with the electronic induction system and used for acquiring destination information of a user, receiving walking path information and sending the destination information and the walking path information to the data processing background; the data processing background is connected with the voice device and used for calculating to obtain navigation information according to the destination information and the walking path information; the voice device is also used for playing the navigation information. The assembled automatic navigation blind road system can not only guide a user to arrive at a destination, but also ensure that the user does not deviate from the blind road, thereby improving the passing convenience and safety of the user and leading the blind road system of the urban road to be more intelligent.
Description
Technical Field
The invention belongs to the technical field of municipal engineering, and particularly relates to an assembled automatic navigation blind road system based on a wireless network.
Background
The current blind road system usually lays guide turning or prompting bricks on the road, generally depends on the self touch sense of visually impaired people to judge the road direction, and needs to be used together with tools such as crutches and the like, and if some road surfaces which are not suitable for being provided with concave-convex parts are used, inconvenience is brought to motor vehicles or pedestrians; the conventional handheld navigation system depends on satellite positioning of handheld equipment, and for some visually impaired people, such as roads without blind roads, even if the system is matched with the navigation system, the problem of deviating from a given route or colliding with an obstacle is easy to occur, so that the intelligent degree is low, and accurate guide information is difficult to form.
Disclosure of Invention
In order to overcome the technical defects, the invention provides an assembly type automatic navigation blind road system based on a wireless network, which can solve the problem of low intelligent level of the existing blind road.
In order to solve the problems, the invention is realized according to the following technical scheme:
an assembled automatic navigation blind road system based on a wireless network comprises: the system comprises a blind road, an electronic induction system, a voice device and a data processing background;
the blind road is arranged on a road;
the electronic induction system is arranged on the blind road and used for acquiring the walking path information of the user;
the voice device is connected with the electronic induction system and used for acquiring destination information of a user, receiving the walking path information and sending the destination information and the walking path information to the data processing background;
the data processing background is connected with the voice device and used for calculating navigation information according to the destination information and the walking path information;
the voice device is also used for playing the navigation information.
Compared with the prior art, the invention has the following beneficial effects: through set up the electronic induction system on the blind road, accurate walking path information who acquires the user realizes the accurate positioning to the user when the blind road is walked to calculate navigation information through the data processing backstage, guide the user to reach the destination, and can ensure that the user can not squint the blind road, improved user's current convenience and security, make the blind road system of urban road more intelligent.
As a further improvement of the present invention, the walking path information includes: pressure information and first positioning information;
the electronic sensing system includes:
the pressure sensing module is arranged on the bottom surface of the blind road or embedded in the blind road and used for acquiring the pressure information on the blind road, and the pressure information is used for indicating a user to be positioned on the blind road;
the local positioning modules are mutually networked, and the pressure sensing modules are relatively positioned to obtain the first positioning information;
the storage module is used for storing a characteristic label of the blind road, wherein the characteristic label comprises the width, the attribute and the environmental information of the blind road;
and the wireless communication module is connected with the local positioning module, the pressure sensing module and the storage module and is used for sending the pressure information, the feature tag and the first positioning information to the voice device.
As a further improvement of the present invention, the speech apparatus includes:
the voice reading module is used for acquiring the destination information;
the local communication module is connected with the wireless communication module and used for receiving the first positioning information, the pressure information and the feature tag;
the mobile positioning and internet communication module is used for acquiring second positioning information through a mobile positioning technology, and the second positioning information is used for indicating the current position of a user in a city area; the mobile positioning and internet communication module is connected with the local communication module and the voice reading module to acquire the destination information, the first positioning information, the pressure information and the feature tag.
As a further improvement of the present invention, the data processing background comprises:
the network interface is connected with the mobile positioning and internet communication module to transmit data, and is also connected with the internet to acquire city map information;
the computing device is connected with the network interface for data transmission and used for computing the navigation information according to the feature tag, the first positioning information, the second positioning information, the pressure information and the destination information;
the speech device further comprises: and the voice playing module is connected with the mobile positioning and internet communication module and is used for playing the navigation information.
As a further improvement of the present invention, the computing device comprises: the system comprises a local navigation calculation module and a road navigation calculation module; the navigation information includes: local navigation information and road navigation information, wherein the local navigation information is used for guiding a user on the blind road, and the road navigation information is used for guiding the user to a destination;
the local navigation calculation module is used for calculating the local navigation information according to the feature tag, the first positioning information and the pressure information;
the road navigation calculation module is used for calculating the road navigation information according to the destination information and the second positioning information.
As a further improvement of the present invention, the local navigation information includes: offset information and step number information; the offset information is used for indicating the condition that the user offsets the blind road; the step number information is used for indicating the step number of the user at the position where the user is far away from the next blind road change or slope abrupt change;
the local navigation computation module comprises: an offset information calculation unit and a step number information calculation unit;
the offset information calculation unit is used for calculating the offset information according to the pressure signal and the first positioning information;
the step number information calculating unit is used for calculating the step number information according to the pressure signal and the first positioning information.
As a further improvement of the present invention, the road navigation information includes: road planning information, direction guidance information and distance guidance information; the road planning information is used for indicating path planning to a destination; the direction guiding information is used for indicating the walking direction of the user; the distance guide information is used for indicating the distance between the user and the destination or/and the estimated time length;
the road navigation calculation module includes: the system comprises a road planning information calculation unit, a direction guide information calculation unit and a distance guide information calculation unit;
the road planning information calculation unit is used for calculating to obtain the road planning information according to the feature tag, the first positioning information, the second positioning information, the pressure information and the destination information;
the direction information calculation unit is used for calculating the direction information according to the feature tag, the first positioning information, the second positioning information, the pressure information and the destination information;
the distance guidance information calculation unit is used for calculating the distance guidance information according to the feature tag, the first positioning information, the second positioning information, the pressure information and the destination information.
As a further improvement, the present invention further comprises a read-write device, connected to the electronic sensing system, for inputting the feature tag; the read-write device comprises:
the writing module is used for inputting the characteristic label;
the display module is connected with the writing module and is used for displaying the feature tag;
and the wireless transceiver module is connected with the writing module and the wireless communication module and is used for transmitting the characteristic label to the wireless communication module of the electronic induction system.
As a further improvement of the invention, the voice device is a bone conduction type earphone with a microphone, a local wireless communication function and a mobile positioning and internet communication function.
As a further improvement of the invention, the invention also comprises: and the line channel is positioned right below the blind road and used for providing a walking channel for maintainers and setting a power supply circuit.
Drawings
Embodiments of the invention are described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic structural diagram of an automatic navigation blind road system according to embodiment 1;
FIG. 2 is a schematic diagram of the pavement of the blind road in embodiment 1;
FIG. 3 is a schematic structural diagram of a computing device according to embodiment 1;
description of the labeling: 1-blind road; 2-an electronic induction system; 21-a pressure sensing module; 22-local positioning module; 23-a storage module; 24-a wireless communication module; 3-a voice device; 31-a voice reading module; 32-local communication module; 33-mobile positioning and internet communication module; 34-a voice playing module; 4-data processing background; 41-network interface; 42-a computing device; 421-local navigation computation module; 4211-offset information calculating means; 4212-step number information calculating unit; 422-road navigation calculation module; 4221-road planning information calculation unit; 4222-a direction information calculation unit; 4223-distance guide information unit; 5-a read-write device; 51-a write module; 52-a display module; 53-wireless transceiver module; a 6-line channel; 7-road.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example one
The embodiment discloses an assembled automatic navigation blind road system based on a wireless network, as shown in fig. 1 and fig. 2, including: the blind sidewalk comprises a blind sidewalk 1, an electronic induction system 2, a voice device 3 and a data processing background 4; the blind road 1 is arranged on a road 7, the blind road 1 can comprise a blind person special road with a special mark, can be laid by special concave-convex bricks on the surface specified in urban road and building barrier-free design specifications, and can also be laid by a flat road with patterns on the surface, but the size of the blind road should have a uniform specification; the electronic induction system 2 is arranged on the blind road 1 and used for acquiring the walking path information of the user; the voice device 3 is a device carried by a user, is connected with the electronic induction system 2, and is used for acquiring destination information of the user, receiving walking path information, and sending the destination information and the walking path information to the data processing background 4; the data processing background 4 is connected with the voice device 3 and used for calculating navigation information according to the destination information and the walking path information; the speech means 3 are also used for playing navigation information.
In the above embodiment, the walking path information includes: pressure information and first positioning information; the electronic induction system 2 includes: the system comprises a pressure sensing module 21, a local positioning module 22, a storage module 23 and a wireless communication module 24, wherein the pressure sensing module 21 is arranged on the bottom surface of the blind road 1 or embedded in the blind road 1 and used for acquiring pressure information on the blind road 1, the pressure information is used for indicating that a user is in the blind road 1, and the pressure sensing module 21 can be a pressure sensor; the adjacent local positioning modules 22 are mutually networked to relatively position the pressure sensing module 21 so as to obtain first positioning information, and the first positioning information is used for indicating the position of the blind road 1 where a user is currently located; the storage module 23 is configured to store a feature tag of the blind sidewalk 1, where the feature tag includes information such as width, attribute, and environment of the blind sidewalk 1, and in an initial stage of road construction, the feature tag may be input to a road on which an automatic navigation type blind sidewalk system is laid, so as to provide hardware support for construction of an intelligent automatic navigation type blind sidewalk system; the wireless communication module 24 is connected to the local positioning module 22, the pressure sensing module 21 and the storage module 23, and is configured to send the pressure information, the feature tag and the first positioning information to the speech device 3.
Specifically, when a user steps on the blind sidewalk, the pressure sensing module 21 generates a pressure signal, and after networking the plurality of adjacent local positioning modules 22, the pressure sensing module 21 which successively generates the pressure signal is positioned, so as to obtain first positioning information of the current user in a local area formed by the plurality of blind sidewalks.
In the above embodiment, the speech device 3 includes: the system comprises a voice reading module 31, a local communication module 32 and a mobile positioning and internet communication module 33, wherein the voice reading module 31 is used for acquiring destination information of a user; the local communication module 32 is connected with the wireless communication module 24 and is used for receiving the first positioning information, the pressure information and the characteristic label; the mobile positioning and internet communication module 33 is configured to obtain second positioning information through a mobile positioning technology, where the second positioning information is used to indicate a current position of a user in an urban area; the mobile positioning and internet communication module 33 is connected with the local communication module 32 and the voice reading module 31 to acquire destination information, first positioning information, pressure information and a feature tag.
In the above embodiment, as shown in fig. 1, the data processing background 4 includes: the network interface 41 and the computing device 42, the network interface 41 is connected with the mobile positioning and internet communication module 33 for data transmission, the network interface 41 is also connected with the internet for obtaining city map information, and the city map information may include all road information and building information in a city; the computing device 42 is connected to the network interface 41 for data transmission, and is configured to compute navigation information according to the feature tag, the first positioning information, the second positioning information, the pressure information, and the destination information.
Further, as shown in fig. 1, the speech apparatus 3 further includes: and the voice playing module 34 is connected with the mobile positioning and internet communication module 33 and is used for playing navigation information. The bone conduction type earphone with the microphone, the local wireless communication function, the mobile positioning function and the internet communication function is preferably adopted in the embodiment, the voice reading module 31 and the voice playing module 34 are integrated, the carrying is convenient, and the receiving of surrounding environment sound information by surrounding pedestrians is not influenced.
In the above embodiment, as shown in fig. 3, the computing device 42 includes: a local navigation calculation module 421 and a road navigation calculation module 422; the navigation information includes: the system comprises local navigation information and road navigation information, wherein the local navigation information is used for guiding a user on a blind road, and the road navigation information is used for guiding the user to a destination; the local navigation calculation module 421 is configured to calculate local navigation information according to the feature tag, the first positioning information, and the pressure information; the road navigation calculation module 422 is configured to calculate road navigation information according to the destination information and the second positioning information.
In the above embodiment, as shown in fig. 3, the local navigation information includes: offset information and step number information; the offset information is used for indicating the condition that the user offsets the blind road; the step number information is used for indicating the step number of the user at the position where the user is far away from the next blind road change or slope abrupt change; the local navigation computation module 421 includes: offset information calculation section 4211 and step number information calculation section 4212; the offset information calculation unit 4211 is configured to calculate offset information according to the pressure signal and the first positioning information; the step information calculation unit 4212 is configured to calculate step information from the pressure signal and the first positioning information.
Specifically, after the local positioning module 22 is networked, when first positioning information is acquired, the spatial arrangement rule of the blind sidewalk 1 near the pressure sensing module 21 can be acquired according to positioning signals in various directions, and the walking direction of the pedestrian and the approximate angle deviating from the axis of the blind sidewalk are judged according to the pressure signals of the pressure sensing module 21; in addition, the average stride of the pedestrian can be calculated according to the change of the pressure signal, so that the distance measurement is converted into the step number measurement, and the step number of the next blind road turning position is calculated.
In the above embodiment, the road navigation information includes: road planning information, direction guidance information and distance guidance information; the road planning information is used for indicating path planning to a destination; the direction guiding information is used for indicating the walking direction of the user; the distance guide information is used for indicating the distance between the user and the destination or/and the estimated time length; the road navigation calculation module 422 includes: a road plan information calculation unit 4221, a direction guide information calculation unit 4222, and a distance guide information unit 4223; the road planning information calculation unit 4221 is configured to calculate road planning information according to the feature tag, the first positioning information, the second positioning information, the pressure information, and the destination information; the direction information calculation unit 4222 is configured to calculate direction information according to the feature tag, the first positioning information, the second positioning information, the pressure information, and the destination information; the distance guidance information unit 4223 is configured to calculate distance guidance information according to the feature tag, the first positioning information, the second positioning information, the pressure information, and the destination information.
Based on the technical scheme, no matter the special bricks with concave and convex surfaces are paved or the road with flat surfaces is paved, a user can be guided to the blind sidewalk 1, yaw cannot be generated, the walking direction of the blind sidewalk can be corrected in time even if the blind sidewalk 1 deviates, and the automatic navigation blind sidewalk system can replace the traditional special bricks with concave and convex surfaces for paving, so that the influence on common pedestrians and non-motor vehicles is reduced; in addition, the step number of the position where the blind road turns or the slope is suddenly changed is reminded by voice; at a certain position away from the intersection, the road names of different steering directions can be prompted, so that the user can make preparation for reversing in advance, and great convenience is provided for the traveling of visually impaired people.
In the above embodiment, the system further includes a reading and writing device 5 connected to the electronic sensing system 2, and configured to input a feature tag before the blind sidewalk 1 is used, where the feature tag is used to indicate the arrangement of a road 7, such as a road named as XX major street, where the road is north and south, the width is X meters, the length is X meters, and the road surface is flat and has no slope.
In the above embodiment, the read/write device 5 includes: the system comprises a writing module 51, a display module 52 and a wireless transceiving module 53, wherein the writing module 51 is preferably a touch screen and is used for inputting a feature tag; the display module 52 is connected with the writing module 53 and is used for displaying the feature labels, and the display module 52 is preferably a liquid crystal screen; the wireless transceiver module 53 is connected to the write module 51 and the wireless communication module 24, and is configured to transmit the feature tag to the wireless communication module of the electronic induction system 2.
In the above embodiment, the method further includes: and the line channel 6 is positioned under the blind road 1 and used for providing a walking channel for maintainers and setting a power supply circuit, and the line channel 6 can be formed by splicing prefabricated assembled duct pieces.
The invention will be further explained with reference to specific embodiments, as follows:
1. in the initial stage of road construction, planning a blind road 1 of an urban road, laying pressure induction modules 21 on the blind road 1, such as the blind road 1 on a sidewalk, the blind road 1 on a zebra crossing and the like, and forming a directional networking by positioning all the pressure induction modules 21 through a local positioning module 22 so as to provide hardware support for the use of an automatic navigation type blind road system;
2. the data processing background 4 acquires urban subway information and provides hardware support for the use of an automatic navigation type blind road system;
3. when the blind sidewalk navigation system is used, a user inputs destination information through the voice reading module, when the user stands on a blind sidewalk, the pressure sensing module generates a pressure signal, so that first positioning information that the user is located on a certain blind sidewalk is detected, meanwhile, the mobile positioning and internet communication module 33 acquires second positioning information that the user is located in an urban area, the data processing background calculates navigation information through the first positioning information and the second positioning information, navigation is conducted for the user, the navigation can guide the user to the destination, the user can be guided on the blind sidewalk, the user is enabled to walk on the blind sidewalk 1 all the time, and yaw cannot be generated.
Therefore, the automatic navigation blind road system has the voice navigation of inputting the destination mode on the macroscopic level, and also has the voice navigation which can facilitate the high-efficiency communication of the visually impaired, thereby greatly improving the passing convenience and safety of the visually impaired, leading the blind road system of the urban road to be more intelligent and reducing the dependence of the visually impaired on the traditional special bricks with the concave-convex surfaces.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (5)
1. An assembled automatic navigation blind road system based on a wireless network is characterized by comprising: the system comprises a blind road, an electronic induction system, a voice device and a data processing background;
the blind road is arranged on a road;
the electronic induction system is arranged on the blind road and used for acquiring the walking path information of the user;
the voice device is connected with the electronic induction system and used for acquiring destination information of a user, receiving the walking path information and sending the destination information and the walking path information to the data processing background;
the data processing background is connected with the voice device and used for calculating navigation information according to the destination information and the walking path information; the voice device is also used for playing the navigation information; the walking path information includes: pressure information and first positioning information;
the electronic sensing system includes:
the pressure sensing module is arranged on the bottom surface of the blind road or embedded in the blind road and used for acquiring the pressure information on the blind road, and the pressure information is used for indicating a user to be positioned on the blind road;
the local positioning modules are mutually networked, and the pressure sensing modules are relatively positioned to obtain the first positioning information;
the storage module is used for storing a characteristic label of the blind road, wherein the characteristic label comprises the width, the attribute and the environmental information of the blind road;
the wireless communication module is connected with the local positioning module, the pressure sensing module and the storage module and is used for sending the pressure information, the feature tag and the first positioning information to the voice device;
the speech device includes:
the voice reading module is used for acquiring the destination information;
the local communication module is connected with the wireless communication module and used for receiving the first positioning information, the pressure information and the feature tag;
the mobile positioning and internet communication module is used for acquiring second positioning information through a mobile positioning technology, and the second positioning information is used for indicating the current position of a user in a city area; the mobile positioning and internet communication module is connected with the local communication module and the voice reading module to acquire the destination information, the first positioning information, the pressure information and the feature tag;
the data processing background comprises:
the network interface is connected with the mobile positioning and internet communication module to transmit data, and is also connected with the internet to acquire city map information;
the computing device is connected with the network interface for data transmission and used for computing the navigation information according to the feature tag, the first positioning information, the second positioning information, the pressure information and the destination information;
the speech device further comprises: the voice playing module is connected with the mobile positioning and Internet communication module and is used for playing the navigation information;
the computing device includes: the system comprises a local navigation calculation module and a road navigation calculation module; the navigation information includes: local navigation information and road navigation information, wherein the local navigation information is used for guiding a user on the blind road, and the road navigation information is used for guiding the user to a destination;
the local navigation calculation module is used for calculating the local navigation information according to the feature tag, the first positioning information and the pressure information;
the road navigation calculation module is used for calculating the road navigation information according to the destination information and the second positioning information;
the local navigation information includes: offset information and step number information; the offset information is used for indicating the condition that the user offsets the blind road; the step number information is used for indicating the step number of the user at the position where the user is far away from the next blind road change or slope abrupt change;
the local navigation computation module comprises: an offset information calculation unit and a step number information calculation unit;
the offset information calculation unit is used for calculating the offset information according to the pressure signal and the first positioning information;
the step number information calculating unit is used for calculating the step number information according to the pressure signal and the first positioning information.
2. The automatic navigation blind track system of claim 1, wherein the road navigation information comprises: road planning information, direction guidance information and distance guidance information; the road planning information is used for indicating path planning to a destination; the direction guiding information is used for indicating the walking direction of the user; the distance guide information is used for indicating the distance between the user and the destination or/and the estimated time length;
the road navigation calculation module includes: the system comprises a road planning information calculation unit, a direction guide information calculation unit and a distance guide information calculation unit;
the road planning information calculation unit is used for calculating to obtain the road planning information according to the feature tag, the first positioning information, the second positioning information, the pressure information and the destination information;
the direction information calculation unit is used for calculating the direction information according to the feature tag, the first positioning information, the second positioning information, the pressure information and the destination information;
the distance guidance information calculation unit is used for calculating the distance guidance information according to the feature tag, the first positioning information, the second positioning information, the pressure information and the destination information.
3. The automatic navigation blind track system according to claim 1, further comprising a read-write device connected to the electronic sensing system for inputting the feature tag; the read-write device comprises:
the writing module is used for inputting the characteristic label;
the display module is connected with the writing module and is used for displaying the feature tag;
and the wireless transceiver module is connected with the writing module and the wireless communication module and is used for transmitting the characteristic label to the wireless communication module of the electronic induction system.
4. The automatic navigation blind track system of claim 1, wherein the voice device is a bone conduction headset with a microphone, a local wireless communication function and a mobile positioning and internet communication function.
5. The automatic navigation blind track system of claim 1, further comprising: and the line channel is positioned right below the blind road and used for providing a walking channel for maintainers and setting a power supply circuit.
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