A multi-layer spiral tunnel sight guidance system combining audio and video

Abstract

The invention relates to tunnel safety facilities, and discloses a multi-layer spiral tunnel sight guidance system combining audio and video, comprising a vehicle detection module, a sound broadcast module, and a control module; the vehicle detection module comprises an infrared sensing unit for monitoring the passing of vehicles and a position information unit for storing the installation coordinates of each infrared sensing unit, the control module comprises a voice unit for storing the broadcast content, the control module matches the infrared sensing unit received with the broadcast content in the voice unit, and sends a broadcast instruction carrying the broadcast content to the sound broadcast module; the sound broadcast module comprises a sound generating unit, the sound generating unit is arranged in the vehicle, and the sound broadcast module controls the sound generating unit to broadcast the number of floors of the spiral tunnel where the vehicle is located in real time according to the received broadcast instruction, so as to solve the technical problem that the driver cannot accurately judge the current floor position when driving in the multi-layer spiral tunnel.

Description

Technical Field

[0001] The invention relates to tunnel safety facilities, in particular to a multi-layer spiral tunnel sight line induction system combining sound and image. Background Art

[0002] In the construction of mountainous cities with complex and changeable terrain such as Chongqing, due to the unique ups and downs of mountain cities, the height difference between the two interchanges is large, sometimes up to 20 to 30 meters, and the interchange is limited by land conditions and does not have enough extension length to transition such height differences. To solve the above contradictions, engineers often use the spiral tunnel solution in the design process. The spiral tunnel converts the height change in the vertical direction into a spiral rise or fall in the horizontal direction, so that vehicles can complete the transition from low to high or from high to low in a relatively short horizontal distance through spiral rise or fall, thereby effectively reducing the height difference.

[0003] When the terrain through which the tunnel passes has a very large height difference, in order to maintain the continuity of the road and the slope to meet the design standards, a multi-layer spiral tunnel design is required, which can effectively reduce the slope and improve driving safety and comfort. Especially for Chongqing, which is located in a mountainous area with large terrain fluctuations, in order to build underground garages in the city center or areas with tight land resources, a multi-layer spiral tunnel design can effectively connect each floor and adapt to terrain changes, reducing land occupation.

[0004] However, multi-layer spiral tunnels have the following disadvantages: (1) The curves and slopes in spiral tunnels vary slightly. When a vehicle is traveling between different floors, it is often difficult for the driver to accurately judge the current floor position; this may cause confusion for the driver when looking for an exit or meeting other vehicles, increasing driving risks; (2) In order to reduce the slope, multi-layer spiral tunnels need to be designed with sharper turns, which limits the driver's view of the tunnel sidewall in front, which restricts the driver's field of vision; the driver is difficult to observe the road conditions and potential obstacles ahead during driving, increasing driving risks. (3) Due to sharp turns and limited vision, the driver is prone to crossing the line during driving; (4) The interior of a multi-layer spiral tunnel is usually dark, and artificial lighting is required to ensure driving safety. However, due to the complex structure of the tunnel, it is difficult to evenly distribute lighting equipment, which may lead to insufficient lighting in some areas, affecting the driver's vision and judgment. Summary of the invention

[0005] The present invention is intended to provide a multi-layer spiral tunnel sight guidance system combining sound and image, so as to solve the technical problem that the driver cannot accurately judge the current floor position when driving in the multi-layer spiral tunnel.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical scheme: a multi-layer spiral tunnel sight guidance system combining audio and video, comprising a vehicle detection module, a sound broadcast module, and a control module;

[0007] The vehicle detection module includes an infrared sensing unit for monitoring the passing of vehicles and a position information unit for storing the installation coordinates of each infrared sensing unit. The infrared sensing units are multiple and are sequentially arranged at intervals on the tunnel access road. The vehicle detection module is connected to the control module by electrical signals.

[0008] The control module includes a voice unit for storing broadcast content, the control module matches the infrared sensing unit received with the broadcast content in the voice unit, and sends a broadcast instruction carrying the broadcast content to the sound broadcast module;

[0009] The sound broadcast module includes a sound generating unit, which is arranged in the vehicle. The sound broadcast module controls the sound generating unit to broadcast the number of layers of the spiral tunnel where the vehicle is located in real time according to the received broadcast instruction.

[0010] The principles and advantages of this solution are as follows: in actual application, when a vehicle passes by an infrared sensing unit installed on a tunnel inspection road, the unit will detect the vehicle and send a signal to the control module. The control module pre-stores the broadcast content corresponding to each infrared sensing unit, that is, the tunnel layer information where each infrared sensing unit is located; the control module matches the corresponding broadcast content according to the received signal, and generates a broadcast instruction carrying the broadcast content and sends it to the sound broadcast module. After receiving the broadcast instruction, the sound broadcast module broadcasts the spiral tunnel layer information where the vehicle is located in real time through the sound unit in the vehicle;

[0011] By broadcasting the number of floors of the spiral tunnel where the vehicle is located in real time, the driver can accurately judge the current position and reduce driving risks caused by misjudgment of the floor, such as incorrect exit search and collision when meeting other vehicles. This solution does not rely on external light sources, but is broadcasted through the sound unit in the vehicle. Therefore, it is not affected by the lighting conditions inside the tunnel and can work normally even in areas with insufficient lighting. The present invention supplements the lack of visual information through sound information, so that the driver can have a more comprehensive understanding of the road conditions ahead during driving. The infrared sensing unit and the control module are installed on the tunnel's maintenance road to facilitate future maintenance and replacement; and the sound broadcast module is integrated inside the vehicle, without the need for large-scale transformation of the tunnel.

[0012] Preferably, as an improvement, the installation position and the number of the infrared sensing units are determined by the degree of the center angle of the circle; the calculation formula for the degree of the center angle of the circle is:

[0013] When the linear projection of the spiral tunnel is a circle,

[0014] When the linear projection of the spiral tunnel is an ellipse:

[0015] Where t is the driver's reaction time; f is the longitudinal adhesion coefficient; i is the average slope; R is the tunnel radius, R a is the major radius of the elliptical tunnel, R b is the short radius of the elliptical tunnel; α is the center angle; V is the initial braking velocity of the vehicle.

[0016] The beneficial effects of the improvement are as follows: the installation position and number of infrared sensing units are determined by the degree of the center angle of the circle, so that the infrared sensing units around a single-layer spiral tunnel can be effectively installed. The scheme can adapt to the design of tunnels of various circular or elliptical specifications to provide a more reasonable layout of infrared sensing units, ensuring that the driver can obtain floor information in time when driving to the next floor; and the infrared sensing units are arranged according to the center angle of the circle, which is convenient for determining and managing the coordinates of the infrared sensing units and the floors to which they belong; the traditional method of setting them at a certain distance cannot adapt to the complex line shape and slope changes in multi-layer spiral tunnels;

[0017] This calculation formula enables the driver to obtain timely and accurate floor information in areas with turns or large slope changes; reasonably distributed infrared sensing units can reduce unnecessary broadcasts and prevent the driver from being disturbed by too much information during driving; it helps the driver to better understand the vehicle's position and driving status and avoid driving risks caused by misjudgment or insufficient information.

[0018] Preferably, as an improvement, the value of the initial braking speed of the vehicle is calculated from the design speed of the spiral tunnel;

[0019] When the design speed of the spiral tunnel is 80-120km / h, the initial braking speed of the vehicle is 85% of the design speed;

[0020] When the design speed of the spiral tunnel is 40-80km / h, the initial braking speed of the vehicle is 90% of the design speed;

[0021] When the design speed of the spiral tunnel is less than 40km / h, the initial braking speed of the vehicle is the design speed.

[0022] The beneficial effect of this improvement is that it is easy to determine the specific value of the vehicle's initial braking speed, and the vehicle's initial braking speed value is adjusted according to the design speed of the spiral tunnel, which can ensure that the vehicle has sufficient braking distance when driving in the spiral tunnel, avoid traffic accidents caused by excessive speed, and thus improve driving safety.

[0023] Preferably, as an improvement, the sight line induction system also includes an image indication module, the image indication module includes a luminous sight line induction unit, the luminous sight line induction unit includes a luminous mark group, the luminous mark group is arranged on the side wall of the tunnel in front of the infrared sensing unit along the vehicle's driving direction, and the control module is also used to control the corresponding luminous mark group to light up when receiving the electrical signal emitted by the infrared sensing unit.

[0024] The beneficial effect of this improvement is that the setting of the luminous sign group can provide the driver with clear visual guidance, especially when the light is dim or the visibility is poor in the tunnel, these luminous sign groups can significantly enhance the driver's perception of the situation ahead on the road and reduce the risk of traffic accidents caused by unclear visibility; through the linkage between the infrared sensing unit and the control module, when the vehicle approaches, the corresponding luminous sign group can light up quickly to achieve real-time visual prompts. This rapid response capability can ensure that the driver obtains accurate information at the first time and responds accordingly. In addition, due to the limited field of vision of the driver in the spiral tunnel, only the luminous sign groups that are closer can be seen. The luminous sign groups that are farther away and cannot be seen can save a certain amount of energy consumption by not lighting up temporarily; the luminous sign groups that suddenly light up can also provide visual stimulation for the driver, thereby reducing driving fatigue and improving the driving experience.

[0025] Preferably, as an improvement, the luminous mark group includes multiple luminous marks, and the control module is also used to control the multiple luminous marks in a single luminous mark group to light up in sequence along the direction of vehicle travel, with a lighting interval of 0.1s between two adjacent luminous marks, and each luminous mark lighting up for 3s.

[0026] The beneficial effects of this improvement are: multiple luminous signs light up in sequence to form a continuous, dynamic visual guide line, which can more effectively guide the driver's line of sight for vehicles traveling in tunnels, helping them to better perceive and judge the conditions and distance ahead of the road; dynamically changing luminous signs can attract the driver's attention better than static luminous signs and reduce driving fatigue; the luminous signs light up gradually, allowing the driver's eyes to gradually adapt to changes in brightness, avoiding visual impact and discomfort caused by sudden changes in high brightness; and also compensate for the lighting light in the tunnel.

[0027] Preferably, as an improvement, the luminous mark is in the shape of an arrow, and the direction of the arrow of the luminous mark points to the direction of travel of the vehicle.

[0028] The beneficial effects of this improvement are: enhancing directional indication: the arrow-shaped design makes the luminous sign have clear directional indication, which can intuitively tell the driver the direction the vehicle should go; for a two-way spiral tunnel, when the vehicle crosses the line when turning, the driver will move closer to the opposite lane on the other side. The infrared sensing unit in the opposite lane detects the vehicle and causes the luminous sign on the tunnel wall to light up. When the opposite direction arrow of the tunnel on the other side lights up, it will alert the driver of the crossing line behavior, forcing the driver to correct and return to the correct driving trajectory.

[0029] Preferably, as an improvement, the image indication module further includes a slope guide line, the slope guide line is arranged on the tunnel wall, and when the slope guide line is on an uphill section, it is arranged as an oblique line from bottom to top along the vehicle driving direction, and when the slope guide line is on a downhill section, it is arranged as an oblique line from top to bottom along the vehicle driving direction;

[0030] The length of the slope guide line is determined by the length of the road section with different slopes. If the length of the road section with constant slope is greater than 250m, the slope guide line of the road section is divided into two sections; if the length of the road section with constant slope is less than 250m and greater than 100m, the slope guide line of the road section is set as a whole section; if the length of the road section with constant slope is less than 100m, the slope guide line of the road section and the slope guide line of the next road section are combined into one section; two adjacent slope guide lines are separated by a vertical spacing line.

[0031] The beneficial effects of this improvement are: the slope guide line clearly shows the direction of the slope's rise or fall through an intuitive diagonal line design. This helps the driver to identify the slope change more quickly and prepare in advance, thus avoiding unexpected situations caused by the slope change; the length and segmentation of the slope guide line are set according to the length of the road section with constant slope. For longer slope sections, the segmentation setting can ensure that the driver can obtain clear slope information throughout the driving process; for shorter slope sections, the combined setting can reduce visual interference and improve driving continuity.

[0032] Preferably, as an improvement, the slope guide line and the interval line of a single section each include n single lines, the colors of the n single lines are arranged in yellow and blue, and the number n of the single lines is determined by the number of layers of the spiral tunnel; the color mode calculation formula of the slope guide line or the interval line of the nth layer of the spiral tunnel is:

[0033]

[0034] Where n is the number of layers and single lines of the spiral tunnel, a n It is the color mode of the slope guide line or interval line of the nth layer of the spiral tunnel. B is a single blue line and Y is a single yellow line.

[0035] The beneficial effects of this improvement are: the use of yellow and blue single lines at intervals makes the slope guide lines and interval lines more visually eye-catching and easy to identify. This color contrast can quickly attract the driver's attention, especially in low light or fast driving conditions, and ensure that the driver can clearly see and understand these visual cues; by using different numbers of single lines and different color patterns for different layers, the driver can more intuitively perceive the number of layers and structure of the spiral tunnel; this enhanced spatial perception helps the driver better understand the driving status and position of the vehicle, so as to make more accurate driving decisions.

[0036] Preferably, as an improvement, the sight line induction system also includes a projection warning module, the projection warning module includes a stereoscopic window projection device, the stereoscopic window projection device is arranged on the inspection road in front of the infrared sensing unit along the vehicle's driving direction, and the control module is also used to control the corresponding stereoscopic window projection device to project a projection image containing the spiral tunnel floor information onto the road surface when receiving the electrical signal emitted by the infrared sensing unit.

[0037] The beneficial effect of this improvement is that when the infrared sensing unit detects the approach of a vehicle, the stereoscopic window projection device at the corresponding position will immediately project the floor information. This immediate warning can quickly alert the driver to avoid driving errors or dangerous situations caused by missing the floor information; compared with traditional flat signs or signs, it has more visual impact. This design can quickly attract the driver's attention, increase their attention to the floor information, and supplement the lighting in the tunnel and widen the distribution space of the signs.

[0038] Preferably, as an improvement, the stereoscopic window projection devices are arranged in a group of three at 30 m in front of the infrared sensing unit along the direction of vehicle travel, and the stereoscopic window projection devices in a single group are spaced 15 m apart. The control module is also used to control the stereoscopic window projection devices in a single group to project in sequence along the direction of vehicle travel, and the lighting interval of two adjacent stereoscopic window projection devices is 1 s, and the projection time of each stereoscopic window projection device is 5 s, and the projected image of the stereoscopic window projection device is 2 m long and 3 m wide.

[0039] The beneficial effects of this improvement are: the large-area projection pattern can illuminate the road conditions to a certain extent, help the driver obtain floor information and promptly discover and respond to potential dangerous situations, and the gradual lighting can avoid the interference of sudden strong light to the driver, further improving the safety of road driving. The projected image is located on a single lane, and the image width is smaller than the lane width. Visually, the projected image can completely fill the road width and is located within the road markings on both sides, visually narrowing the lane width and alerting the driver of crossing the line; it only lights up when a vehicle is detected passing, which can minimize unnecessary energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0041] Figure 2 This is a schematic diagram of the structure of the luminous mark and slope guide line.

[0042] Figure 3 This is a schematic diagram of the structure of the first-layer image indication module of the spiral tunnel.

[0043] Figure 4 This is a schematic diagram of the structure of the second-layer image indication module of the spiral tunnel.

[0044] Figure 5 It is a structural schematic diagram of a stereoscopic window projection device.

[0045] Figure 6 It is the projection image of the stereoscopic window projection device. DETAILED DESCRIPTION

[0046] The following is further described in detail through specific implementation methods:

[0047] The reference numerals in the drawings of the specification include: an infrared sensing unit 1 , a luminous mark 2 , a slope guide line 3 , a spacing line 4 , a stereoscopic window projection device 5 and a projection image 6 .

[0048] Example

[0049] A multi-layer spiral tunnel sight guidance system combining audio and video, comprising a vehicle detection module, a sound broadcast module, and a control module;

[0050] As attached Figure 1 As shown, attached Figure 1 It is a one-way two-lane spiral tunnel. The vehicle detection module includes an infrared sensing unit 1 for monitoring the passing of vehicles and a position information unit for storing the installation coordinates of each infrared sensing unit 1. There are multiple infrared sensing units 1, and the multiple infrared sensing units 1 are sequentially arranged at intervals on the tunnel inspection road; the vehicle detection module is connected to the control module by electrical signals;

[0051] The control module includes a voice unit for storing the broadcast content. The control module matches the received infrared sensing unit 1 with the broadcast content in the voice unit, and sends a broadcast instruction carrying the broadcast content to the sound broadcast module;

[0052] The sound broadcast module includes a sound generating unit, which is arranged in the vehicle. The sound broadcast module controls the sound generating unit to broadcast the number of layers of the spiral tunnel where the vehicle is located in real time according to the received broadcast instruction.

[0053] When a vehicle passes by an infrared sensing unit 1, the infrared sensing unit 1 is triggered, and the vehicle detection module sends the coordinate information of the infrared sensing unit 1 to the control module by an electrical signal. The coordinate information of the infrared sensing unit 1 can represent the current driving position of the vehicle. The control module matches the coordinate information of the infrared sensing unit 1 with the broadcast content in the voice unit, and the control module then sends the matched broadcast content to the sound broadcast module. The sound broadcast module in the vehicle receives the signal, and the sound unit broadcasts the voice content, which informs the vehicle of the layer number of the spiral tunnel where it is currently located.

[0054] The installation position and number of the infrared sensing units 1 are determined by the degree of the center angle of the circle; the calculation formula for the degree of the center angle of the circle is:

[0055] When the linear projection of the spiral tunnel is a circle,

[0056] When the linear projection of the spiral tunnel is an ellipse:

[0057] Where t is the driver's reaction time; f is the longitudinal adhesion coefficient; i is the average slope; R is the tunnel radius, R a is the major radius of the elliptical tunnel, R b is the short radius of the elliptical tunnel; α is the center angle (radians); V is the initial braking velocity of the vehicle, that is, the instantaneous velocity before the vehicle starts to decelerate.

[0058] In order to facilitate determination of the initial braking speed of the vehicle, the value of the initial braking speed of the vehicle is calculated from the design speed of the spiral tunnel;

[0059] When the design speed of the spiral tunnel is 80-120km / h, the initial braking speed of the vehicle is 85% of the design speed;

[0060] When the design speed of the spiral tunnel is 40-80km / h, the initial braking speed of the vehicle is 90% of the design speed;

[0061] When the design speed of the spiral tunnel is less than 40km / h, the initial braking speed of the vehicle is the design speed.

[0062] As attached Figure 1 As shown, the sight line induction system also includes an image indication module, which includes a luminous sight line induction unit, and the luminous sight line induction unit includes a luminous mark group, which is arranged on the tunnel side wall 30m ahead of the infrared sensing unit 1 along the vehicle driving direction, and a single luminous mark group corresponds to a single infrared sensing unit 1. The control module is also used to control the corresponding luminous mark group to light up when receiving the electrical signal emitted by the infrared sensing unit 1.

[0063] The luminous sign group includes three luminous signs 2, and the control module is also used to control the three luminous signs 2 in a single luminous sign group to light up in sequence along the direction of vehicle travel, with a lighting interval of 0.1s between two adjacent luminous signs 2, and a lighting duration of 3s for each luminous sign 2. The luminous sign 2 is in the shape of an arrow, and the arrow direction of the luminous sign 2 points to the direction of vehicle travel.

[0064] When the control module receives the coordinate information of the infrared sensing unit 1, the control module controls the luminous mark group at the corresponding position to emit light, and the three luminous marks 2 of the group light up in sequence from the driving direction to form a gradual luminous effect.

[0065] As attached Figure 2 As shown, the image indication module also includes a slope guide line 3, which is set on the tunnel wall. When the slope guide line 3 is on an uphill section, it is set as a bottom-up oblique line along the vehicle's driving direction. When the slope guide line 3 is on a downhill section, it is set as a top-down oblique line along the vehicle's driving direction. The luminous mark 2 is set below the slope guide line 3.

[0066] Among them, as attached Figure 2 (a) is a schematic diagram of the structure of the luminous mark 2 and the slope guide line 3 when the vehicle is traveling in a downhill direction from right to left. The slope guide line 3 is a top-down oblique line from the upper edge of the tunnel to the lower edge of the maintenance road, and the arrow direction of the luminous mark 2 is in the downward direction; as shown in the attached figure Figure 2 Middle (b) is a schematic diagram of the structure of the luminous mark 2 and the slope guide line 3 when the vehicle is traveling in an uphill direction from right to left. The slope guide line 3 is a bottom-up oblique line from the lower edge of the maintenance road to the upper edge of the tunnel, and the arrow direction of the luminous mark 2 is in the upward direction.

[0067] The length of the slope guide line 3 is determined by the length of the road section with different slopes. If the length of the road section with a constant slope is greater than 250m, the slope guide line 3 of the road section is divided into two sections; if the length of the road section with a constant slope is less than 250m and greater than 100m, the slope guide line of the road section is set as a whole section; if the length of the road section with a constant slope is less than 100m, the slope guide line 3 of the road section is combined with the slope guide line 3 of the next road section into one section; two adjacent sections of the slope guide line 3 are separated by a vertically set spacing line 4.

[0068] The slope guide line 3 and the interval line 4 of a single section each include n single lines, the colors of the n single lines are set in yellow and blue, and the number n of single lines is determined by the number of layers of the spiral tunnel; the color mode calculation formula of the slope guide line 3 or the interval line 4 of the nth layer of the spiral tunnel is:

[0069]

[0070] Where n is the number of layers and single lines of the spiral tunnel, a nIt is the color mode of the slope guide line 3 or interval line 4 of the nth layer of the spiral tunnel, B is a blue single line, and Y is a yellow single line; the width of the single line is 40 cm, and the height of the single line is consistent with the tunnel height.

[0071] As attached Figure 3 As shown in FIG. 1 , the current vehicle driving direction is downhill from right to left, and the vehicle is located on the first floor of the spiral tunnel. The slope guide line 3 and the interval line 4 are both composed of a single line, and the color mode is yellow. Figure 4 As shown, the current vehicle driving direction is downhill from right to left, and the vehicle is located on the second floor of the spiral tunnel. The slope guide line 3 and the spacing line 4 are both composed of two single lines, and the color mode of the two single lines is yellow-blue; when the vehicle is located on the third floor of the spiral tunnel, the slope guide line 3 and the spacing line 4 are both composed of three single lines, and the color mode of the three single lines is yellow-blue-yellow.

[0072] As attached Figure 5 and attached Figure 6 As shown, the sight line induction system also includes a projection warning module, which includes a stereoscopic window projection device 5. The stereoscopic window projection device 5 is a rectangular parallelepiped with a shutter structure on the front, and a projector is placed inside. The stereoscopic window projection device 5 is arranged on the inspection road in front of the infrared sensing unit 1 along the driving direction of the vehicle. A single stereoscopic window projection device 5 corresponds to a single infrared sensing unit 1. The control module is also used to control the corresponding stereoscopic window projection device 5 to project when receiving the electrical signal emitted by the infrared sensing unit 1. The stereoscopic window projection device 5 projects a projection image 6 containing the spiral tunnel floor information onto the road surface.

[0073] The three stereoscopic window projection devices 5 are arranged in a group at 30m in front of the infrared sensing unit 1 along the driving direction of the vehicle, and the interval between each group of the stereoscopic window projection devices 5 is 15m. There is a single stereoscopic window projection device group and a single luminous mark group corresponding to the same infrared sensing unit 1, and the installation position of the first stereoscopic window projection device 5 in the corresponding stereoscopic window projection device group is consistent with the installation position of the first luminous mark 2 in the luminous mark group.

[0074] The control module is also used to control a single group of stereoscopic window projection devices 5 to project in sequence along the direction of vehicle travel, with the lighting interval of two adjacent stereoscopic window projection devices 5 being 1 second, and the projection time of each stereoscopic window projection device 5 being 5 seconds, and the projection image 6 of the stereoscopic window projection device 5 being 2 meters long and 3 meters wide; the content displayed by the projection image 6 includes the words "nth floor of the turning tunnel ahead"; as shown in the attached figure Figure 6 As shown, the vehicle is currently traveling on the first floor of the spiral tunnel, and the words displayed in the projection image 6 of this floor are "first floor of the turning tunnel ahead".

[0075] When the control module receives the coordinate information of the infrared sensing unit 1, the control module controls the stereoscopic window projection device group at the corresponding position to project. The three stereoscopic window projection devices 5 of the group project in sequence from the driving direction to form a gradual projection effect.

[0076] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A multi-layer spiral tunnel sight guidance system combining sound and image, characterized by: Including vehicle detection module, sound broadcast module and control module; The vehicle detection module includes an infrared sensing unit for monitoring the passing of vehicles and a position information unit for storing the installation coordinates of each infrared sensing unit. The infrared sensing units are multiple and are sequentially arranged at intervals on the tunnel access road. The vehicle detection module is connected to the control module by electrical signals. The control module includes a voice unit for storing broadcast content, the control module matches the infrared sensing unit received with the broadcast content in the voice unit, and sends a broadcast instruction carrying the broadcast content to the sound broadcast module; The sound broadcast module includes a sound unit, which is arranged in the vehicle. The sound broadcast module controls the sound unit to broadcast the number of layers of the spiral tunnel where the vehicle is located in real time according to the received broadcast instruction; The installation position and number of the infrared sensing units are determined by the degree of the center angle of the circle; the calculation formula for the degree of the center angle of the circle is: When the linear projection of the spiral tunnel is a circle, When the linear projection of the spiral tunnel is an ellipse: Where t is the driver's reaction time; f is the longitudinal adhesion coefficient; i is the average slope; R is the tunnel radius, R a is the major radius of the elliptical tunnel, R b is the short radius of the elliptical tunnel; α is the center angle; V is the initial braking speed of the vehicle; The sight line induction system further comprises an image indication module, the image indication module comprises a luminous sight line induction unit, the luminous sight line induction unit comprises a luminous mark group, the luminous mark group is arranged on the tunnel side wall in front of the infrared sensing unit along the vehicle driving direction, and the control module is further used to control the corresponding luminous mark group to light up when receiving the electrical signal sent by the infrared sensing unit; The image indication module further includes a slope guide line, which is arranged on the tunnel wall. When the slope guide line is on an uphill section, it is arranged as an oblique line from bottom to top along the vehicle travel direction. When the slope guide line is on a downhill section, it is arranged as an oblique line from top to bottom along the vehicle travel direction. The length of the slope guide line is determined by the length of the road section with different slopes. If the length of the road section with constant slope is greater than 250m, the slope guide line of the road section is divided into two sections; if the length of the road section with constant slope is less than 250m and greater than 100m, the slope guide line of the road section is set as a whole section; if the length of the road section with constant slope is less than 100m, the slope guide line of the road section and the slope guide line of the next road section are combined into one section; two adjacent slope guide lines are separated by a vertical spacing line.

2. The multi-layer spiral tunnel sight guidance system combining sound and image according to claim 1 is characterized by: The value of the vehicle's initial braking speed is calculated from the design speed of the spiral tunnel; When the design speed of the spiral tunnel is 80-120km / h, the initial braking speed of the vehicle is 85% of the design speed; When the design speed of the spiral tunnel is 40-80km / h, the initial braking speed of the vehicle is 90% of the design speed; When the design speed of the spiral tunnel is less than 40km / h, the initial braking speed of the vehicle is the design speed.

3. The multi-layer spiral tunnel sight guidance system combining sound and image according to claim 2 is characterized by: The luminous marker group includes multiple luminous markers, and the control module is also used to control the multiple luminous markers in a single luminous marker group to light up in sequence along the direction of vehicle travel, with a lighting interval of 0.1s between two adjacent luminous markers, and each luminous marker lighting up for 3s.

4. The multi-layer spiral tunnel sight guidance system combining sound and image according to claim 3 is characterized by: The luminous mark is in the shape of an arrow, and the direction of the arrow of the luminous mark points to the direction of travel of the vehicle.

5. The multi-layer spiral tunnel sight guidance system combining sound and image according to claim 4 is characterized by: The slope guide line and interval line of a single section include n single lines, and the colors of the n single lines are set in yellow and blue. The number of single lines n is determined by the number of layers of the spiral tunnel; the color mode calculation formula of the slope guide line or interval line of the nth layer of the spiral tunnel is: Where n is the number of layers and single lines of the spiral tunnel, a n It is the color mode of the slope guide line or interval line of the nth layer of the spiral tunnel. B is a single blue line and Y is a single yellow line.

6. The multi-layer spiral tunnel sight guidance system combining sound and image according to claim 5 is characterized by: The sight line guidance system also includes a projection warning module, which includes a stereoscopic window projection device. The stereoscopic window projection device is arranged on the inspection road in front of the infrared sensing unit along the vehicle's driving direction. The control module is also used to control the corresponding stereoscopic window projection device to project when receiving the electrical signal emitted by the infrared sensing unit. The stereoscopic window projection device projects a projection image containing the spiral tunnel floor information onto the road surface.

7. The multi-layer spiral tunnel sight guidance system combining sound and image according to claim 6 is characterized by: The three stereoscopic window projection devices are arranged in a group at 30m in front of the infrared sensing unit along the direction of vehicle travel, and the stereoscopic window projection devices in a single group are spaced 15m apart. The control module is also used to control the stereoscopic window projection devices in a single group to project in sequence along the direction of vehicle travel, the lighting interval between two adjacent stereoscopic window projection devices is 1s, and the projection time of each stereoscopic window projection device is 5s. The projected image of the stereoscopic window projection device is 2m long and 3m wide.

Images