Vehicle safe passing pre-detection system

Abstract

The utility model discloses a vehicle safe passing pre-detection system, which is characterized by comprising a vehicle size safety detection device, a vehicle weight detection device and a vehicle pressure intensity detection device, the vehicle size safety detection device comprises a passing door arranged in the width direction of a running road surface, the passing door comprises two vertical rods vertically arranged on the two sides and further comprises a height limiting rod horizontally arranged above the two vertical rods, and a row of laser sensors are arranged on the lower surface of the height limiting rod in the length direction; the laser sensors comprise laser emitters which are arranged downwards and used for emitting laser and corresponding laser detectors used for receiving reflected laser, the laser emitters are arranged in rows in an attached mode and are arranged at intervals with the corresponding rows of laser detectors in a front-back mode, and the laser detectors are connected with the control center. The system has the characteristics of more comprehensive detection and higher safety, and can better guarantee traffic safety, protect road facilities and optimize road management.

Description

Technical Field

[0001] This utility model relates to the field of vehicle driving safety detection technology, specifically to a vehicle safe passage pre-inspection system. Background Technology

[0002] With the continuous advancement of urbanization and the sustained development of the national economy in my country, the number of freight vehicles is increasing daily, and at the same time, the safety of freight vehicle traffic is becoming increasingly prominent in social life. Tunnels, underpasses, and viaducts, as basic components of road traffic, are very common in modern urban road networks.

[0003] Current vehicle safety inspections generally focus on two aspects: vehicle dimensions and vehicle weight. Dimensional inspections are typically for highways that pass through tunnels or underpasses. If a vehicle's height and width are unsuitable, it cannot pass, so prior inspection is necessary to ensure safety. Weight inspections are generally used for situations where weight restrictions are imposed on vehicles due to geological conditions or the need to pass under bridges with weight limits. Currently, dimensional inspections are generally implemented using height-restricted gates and width-restricted gates. These gates have limited height and width; if a vehicle can pass through, it is considered safe. This method is very simple and direct, but it has a significant drawback: the passage conditions at height-restricted gates and width-restricted gates differ from those at tunnels or underpasses. Height-restricted gates are short in length and allow for instantaneous passage, while tunnels or underpasses are long and vehicles travel within them for a considerable time, often including curves. This might not have a significant impact on height-restricted gates, but for width-restricted gates, it could lead to situations where, although the driver can pass through the width-restricted gate without problems, the increased distance during actual tunnel passage can cause friction between the vehicle's sides and the tunnel walls, resulting in inaccurate detection and compromised safety.

[0004] Currently, vehicle weight detection typically involves placing a floating platform on the road surface, with gravity sensors positioned beneath it. Vehicles then drive onto the platform, and the gravity sensors directly collect the vehicle's weight, comparing it to a safety threshold for detection. However, this method has several drawbacks: First, the weight sensors, operating under high pressure and dusty conditions, suffer from poor stability, are prone to malfunction or inaccuracy, and have a short lifespan. Second, this method only measures vehicle weight, but different vehicles have varying tire widths and even numbers, resulting in different pressures exerted on the road surface. Therefore, vehicle weight does not accurately represent the pressure exerted by the vehicle on the road. The destructive force a vehicle exerts on the road surface is not solely related to its weight but also, and often more importantly, to the pressure it exerts. Therefore, the current method of solely measuring vehicle weight to determine road surface destructiveness ignores the influence of vehicle pressure, leading to poor accuracy. Utility Model Content

[0005] To address the aforementioned shortcomings, the technical problem this utility model aims to solve is: how to provide a more comprehensive and safer vehicle safety passage pre-inspection system, so as to better ensure traffic safety, protect road facilities, and optimize road management.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A vehicle safety passage pre-inspection system, characterized in that it includes a vehicle size safety detection device, a vehicle weight detection device, and a vehicle pressure detection device;

[0008] The vehicle size safety detection device includes a passage gate set along the width of the road surface. The passage gate includes two vertical bars set on both sides, with the distance between the two bars being greater than the vehicle safety width threshold. It also includes a height limit bar set horizontally above the two vertical bars, located at the vehicle safety height threshold position. A row of laser sensors is set along the length of the lower surface of the height limit bar. The laser sensors include a laser emitter set downward for emitting laser light and a corresponding laser detector set for receiving reflected laser light. The laser emitters are arranged in a row and are spaced apart from the corresponding rows of laser detectors. The laser detectors are connected to a control center.

[0009] In this vehicle size safety detection device, the height dimension of the vehicle is directly detected using height restriction bars because the height of a vehicle typically does not change during tunnel travel. Therefore, directly using height restriction bars to detect the safe height dimension is convenient and cost-effective. Simultaneously, the width dimension of the vehicle is detected using rows of laser sensors. The laser emitter in the laser sensor above the vehicle emits laser light that shines onto the vehicle and returns to be received by the laser detector. The laser emitters in the laser sensors on both sides of the vehicle emit laser light that shines onto the road surface and returns to be received by the laser detector. The control center has a vehicle width detection module that can count the time intervals between the laser signals received by each laser detector. By analyzing the differences in the time intervals between the laser signals received by each detector, the position of the corresponding laser detector in the vehicle width direction can be determined, thus obtaining the vehicle width dimension. This vehicle width dimension is then compared with a vehicle width safety threshold. If the vehicle width dimension is less than the safety threshold, a safety alarm is issued. Therefore, this combination of physical detection and non-contact laser measurement detection methods can better achieve vehicle size safety detection and provide a better safety assessment for vehicle passage through tunnels.

[0010] Furthermore, a proximity switch is also provided on the inner side of the height limit bar, and the proximity switch is connected in series in the start control circuit of the laser sensor.

[0011] This allows the laser sensor to be activated only when a vehicle approaches, while remaining off at other times.

[0012] Furthermore, the vehicle weight detection device includes a horizontally arranged floating pressure plate, which is supported by evenly arranged vertical springs on the road surface. A pressure rod is vertically fixed at the center of the lower surface of the floating pressure plate, and the lower end of the pressure rod can be slidably inserted into a closed detection chamber below the road surface. A pressure detection device for detecting the pressure of the pressure rod is installed in the detection chamber.

[0013] By installing the pressure detection device inside a sealed detection chamber, the influence of road dust can be shielded, greatly ensuring its detection accuracy and extending its service life.

[0014] Furthermore, the pressure detection device includes a detection lever arranged laterally, with the fulcrum of the detection lever hinged to a lever support. The long arm end of the detection lever has a conductive section with a sliding contact on it. The lower end of the pressure rod is pressed against the short arm end of the detection lever. The pressure detection device also includes an arc-shaped resistor arranged in the direction of rotation of the long arm end of the detection lever. The arc-shaped resistor has a groove that slides in cooperation with the sliding contact. One end of the arc-shaped resistor and the conductive section are connected to a resistance detection circuit module, which is connected to a control center.

[0015] When the vehicle presses down, it drives the pressure rod downward. The amplified movement distance by a detection lever causes the sliding contact head to slide within a groove. By detecting changes in the resistance value of the arc-shaped resistor, the maximum downward pressure of the pressure rod can be obtained by monitoring the extreme resistance values ​​detected as the vehicle travels over the floating pressure plate. This value has a one-to-one correspondence with the vehicle's weight, allowing the vehicle weight to be determined through a pre-determined relationship. This method, using a lever to amplify the resistance and then measuring it to determine the vehicle's weight, offers higher reliability and sensitivity. Furthermore, it is simple in principle, easy to implement, and inexpensive.

[0016] Furthermore, an insertion port is provided at the upper end of the detection cavity for the insertion of the pressure rod, and a flexible sealing skin is provided around the insertion port and between the pressure rod.

[0017] This ensures a better seal without affecting the force applied by the pressure rod. The detection chamber is completely sealed and isolated from the outside world, which better guarantees the reliability, accuracy, and service life of the pressure detection device.

[0018] Furthermore, each end of the floating pressure plate is hinged with an inclined ramp that connects to the road surface. This allows vehicles to drive onto the floating pressure plate more smoothly.

[0019] Furthermore, a roller is provided at the end of the inclined ramp that connects to the road surface. This ensures that the lower end of the inclined ramp is in rolling contact with the road surface, preventing it from affecting the pressing down of the floating pressure plate.

[0020] Furthermore, the vehicle pressure detection device includes two parallel detection strips corresponding to the wheels on both sides of the vehicle. The distance between the two detection strips is less than the distance between the inner sides of the smallest wheel of the vehicle, and the distance between the two detection strips is greater than the distance between the outer sides of the largest wheel of the vehicle. Several pressure sensors are evenly arrayed in the detection strips, and each pressure sensor is connected to the control center.

[0021] In this way, the control center sets up a corresponding pressure detection program, and when a vehicle travels over the detection strip, it can sense the number of pressure sensors under pressure. Based on the planar density of the pressure sensors, it calculates the contact area between the vehicle's wheels and the ground. Then, based on the vehicle weight obtained from the previous pressure detection device, it calculates the average pressure exerted by the vehicle on the road surface. This detected vehicle pressure value is then compared with a predetermined pressure safety threshold. If it exceeds the safety threshold, a safety issue is identified, and an alarm is triggered. This safety threshold is calculated based on the actual pressure-bearing capacity of road surfaces with pressure requirements (such as some special material pavements, sections with poor geological strength, or bridge pavements). This better ensures the driving safety of vehicles on special road surfaces with pressure requirements.

[0022] Furthermore, the detection strip is integrally provided with a mounting groove, the pressure sensor is installed in the mounting groove, and an elastic skin is sealed on the upper surface of the mounting groove.

[0023] This sealed design of the pressure sensor provides better protection, ensures its detection accuracy and stability, and extends its service life.

[0024] Furthermore, the bottom of the mounting groove is provided with a matching mounting groove for each pressure sensor. Each pressure sensor is installed in the corresponding mounting groove. When the pressure sensor is not under force, the upper surface protrudes above the upper surface of the mounting groove. When the pressure sensor is under pressure to the limit, the upper surface is lower than the upper surface of the mounting groove.

[0025] This design ensures that the pressure sensor only bears part of the vehicle's pressure. Once the vehicle presses the pressure sensor down to the same height as the mounting groove opening, it can no longer be pressed down, thus greatly ensuring the safety of the pressure sensor without affecting its sensing and detection capabilities.

[0026] Furthermore, a non-Newtonian fluid is also filled between the upper surface of the pressure sensor and the elastic skin inside the mounting groove.

[0027] Non-Newtonian fluids exhibit shear-thickening properties, meaning their viscosity increases with external force; therefore, the heavier the vehicle, the higher the viscosity of the non-Newtonian fluid. Since the pressure sensor is installed deep within the mounting groove, and the pressure sensor is typically circular with its corresponding circular mounting groove, there is a non-installation area between the grooves. This non-installation area has a short distance from the elastic skin, and the viscosity of the non-Newtonian fluid increases under vehicle pressure. This allows for better rigid support to be formed between the non-installation area and the elastic skin, protecting the pressure sensor. Furthermore, the properties of non-Newtonian fluids mean that the support rigidity increases with vehicle weight and pressure. This provides excellent protection for the pressure sensor even when extremely heavy vehicles pass by, preventing damage from vehicle pressure without affecting its pressure detection and signal transmission.

[0028] Therefore, this utility model can quickly detect the vehicle's dimensions, weight, and average wheel pressure on the road surface before the vehicle passes through, thereby predicting whether it can smoothly and safely pass through the target road section. This provides timely traffic data support to traffic management departments, thus minimizing the occurrence of vehicle accidents of this type. Therefore, this utility model has significant practical implications for ensuring traffic safety, protecting road facilities, and optimizing road management, and can effectively improve the overall operational efficiency and safety of the traffic system.

[0029] In summary, this utility model features more comprehensive detection and higher safety, which can better ensure traffic safety, protect road facilities, and optimize road management. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the vehicle size safety detection device used in a preferred embodiment of the present invention.

[0031] Figure 2 for Figure 1 A magnified partial structural diagram of the lower surface of the individual height restriction bar.

[0032] Figure 3 This is a schematic diagram of the vehicle weight detection device used in a preferred embodiment of the present invention.

[0033] Figure 4 for Figure 3 A magnified partial structural diagram of the individual pressure detection device.

[0034] Figure 5 This is a schematic diagram of the vehicle pressure detection device used in a preferred embodiment of the present invention.

[0035] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure of a separate mounting slot. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to specific embodiments.

[0037] Preferred implementation method: See Figure 1-6 As shown, a vehicle safety passage pre-inspection system is characterized by including a vehicle size safety detection device, a vehicle weight detection device, and a vehicle pressure detection device.

[0038] The vehicle size safety detection device includes a passage gate set along the width of the road surface. The passage gate includes two vertical poles 1 set vertically on both sides, with the distance between the two vertical poles 1 being greater than the vehicle safety width threshold. It also includes a height limit pole 2 set horizontally above the two vertical poles 1. The height limit pole 2 is located at the vehicle safety height threshold position. A row of laser sensors is set along the length of the lower surface of the height limit pole 2. The laser sensors include laser emitters 3 set downward for emitting lasers and corresponding laser detectors 4 for receiving reflected lasers. The laser emitters 3 are arranged in a row and are spaced apart from the corresponding rows of laser detectors 4. The laser detectors 4 are connected to a control center (not shown in the figure).

[0039] In this vehicle size safety detection device, the height dimension of the vehicle is directly detected using height restriction bars because the height of a vehicle typically does not change during tunnel travel. Therefore, directly using height restriction bars to detect the safe height dimension is convenient and cost-effective. Simultaneously, the width dimension of the vehicle is detected using rows of laser sensors. The laser emitter in the laser sensor above the vehicle emits laser light that shines onto the vehicle and returns to be received by the laser detector. The laser emitters in the laser sensors on both sides of the vehicle emit laser light that shines onto the road surface and returns to be received by the laser detector. The control center has a vehicle width detection module that can count the time intervals between the laser signals received by each laser detector. By analyzing the differences in the time intervals between the laser signals received by each detector, the position of the corresponding laser detector in the vehicle width direction can be determined, thus obtaining the vehicle width dimension. This vehicle width dimension is then compared with a vehicle width safety threshold. If the vehicle width dimension is less than the safety threshold, a safety alarm is issued. Therefore, this combination of physical detection and non-contact laser measurement detection methods can better achieve vehicle size safety detection and provide a better safety assessment for vehicle passage through tunnels.

[0040] The height limit bar 2 is also equipped with a proximity switch 5, which is connected in series in the start-up control circuit of the laser sensor.

[0041] This allows the laser sensor to be activated only when a vehicle approaches, while remaining off at other times.

[0042] The vehicle weight detection device includes a horizontally arranged floating pressure plate 6, which is supported by evenly arranged vertical springs 7 on the road surface. A pressure rod 8 is vertically fixed at the middle of the lower surface of the floating pressure plate 6. The lower end of the pressure rod 8 can be slidably inserted into a closed detection chamber 9 below the road surface. A pressure detection device for detecting the pressure of the pressure rod 8 is provided in the detection chamber 9.

[0043] By installing the pressure detection device inside a sealed detection chamber, the influence of road dust can be shielded, greatly ensuring its detection accuracy and extending its service life.

[0044] The pressure detection device includes a detection lever 10 arranged laterally. The fulcrum of the detection lever 10 is hinged to a lever support 11. The detection lever is made of insulating material and has a conductive section 12 at its long arm end. A sliding contact is provided on the conductive section 12. The lower end of the pressure rod 8 is pressed against the short arm end of the detection lever. The pressure detection device also includes an arc-shaped resistor 13, which is arranged in the direction of rotation of the long arm end of the detection lever. A sliding groove is provided on the arc-shaped resistor 13, which slides and engages with the sliding contact. One end of the arc-shaped resistor 13 and the conductive section are connected to a resistance detection circuit module 14, which is connected to a control center.

[0045] When the vehicle presses down, it drives the pressure rod downward. The amplified movement distance by a detection lever causes the sliding contact head to slide within a groove. By detecting changes in the resistance value of the arc-shaped resistor, the maximum downward pressure of the pressure rod can be obtained by monitoring the extreme resistance values ​​detected as the vehicle travels over the floating pressure plate. This value has a one-to-one correspondence with the vehicle's weight, allowing the vehicle weight to be determined through a pre-determined relationship. This method, using a lever to amplify the resistance and then measuring it to determine the vehicle's weight, offers higher reliability and sensitivity. Furthermore, it is simple in principle, easy to implement, and inexpensive.

[0046] The detection chamber 9 has an insertion port at its upper end for inserting a pressure rod, and a flexible sealing skin 15 is provided around the insertion port and between the insertion port and the pressure rod.

[0047] This ensures a better seal without affecting the force applied by the pressure rod. The detection chamber is completely sealed and isolated from the outside world, which better guarantees the reliability, accuracy, and service life of the pressure detection device.

[0048] The floating pressure plate 6 has an inclined ramp 16 hinged at both its front and rear ends to connect with the road surface. This allows vehicles to drive more smoothly onto the floating pressure plate.

[0049] The inclined ramp 16 is equipped with a roller 17 at the end that connects to the road surface. This ensures that the lower end of the inclined ramp is in rolling contact with the road surface, preventing it from affecting the pressing down of the floating pressure plate.

[0050] The vehicle pressure detection device includes two parallel detection strips 18 corresponding to the wheels on both sides of the vehicle. The distance between the two detection strips 18 is smaller than the distance between the inner sides of the smallest wheel of the vehicle, and the distance between the two detection strips is larger than the distance between the outer sides of the largest wheel of the vehicle. Several pressure sensors 19 are evenly arranged in an array within the detection strips 18, and each pressure sensor 19 is connected to the control center.

[0051] In this way, the control center sets up a corresponding pressure detection program, and when a vehicle travels over the detection strip, it can sense the number of pressure sensors under pressure. Based on the planar density of the pressure sensors, it calculates the contact area between the vehicle's wheels and the ground. Then, based on the vehicle weight obtained from the previous pressure detection device, it calculates the average pressure exerted by the vehicle on the road surface. This detected vehicle pressure value is then compared with a predetermined pressure safety threshold. If it exceeds the safety threshold, a safety issue is identified, and an alarm is triggered. This safety threshold is calculated based on the actual pressure-bearing capacity of road surfaces with pressure requirements (such as some special material pavements, sections with poor geological strength, or bridge pavements). This better ensures the driving safety of vehicles on special road surfaces with pressure requirements.

[0052] The detection strip 18 is provided with an integral mounting groove 20, the pressure sensor 19 is installed in the mounting groove, and an elastic skin 21 is sealed on the upper surface of the mounting groove 20.

[0053] This sealed design of the pressure sensor provides better protection, ensures its detection accuracy and stability, and extends its service life.

[0054] The bottom of the mounting groove 20 is provided with a matching mounting groove 22 for each pressure sensor. Each pressure sensor 19 is installed in the corresponding mounting groove 22. When the pressure sensor 19 is not under force, its upper surface protrudes above the upper surface of the mounting groove. When the pressure sensor is under pressure to the limit, its upper surface is lower than the upper surface of the mounting groove.

[0055] This design ensures that the pressure sensor only bears part of the vehicle's pressure. Once the vehicle presses the pressure sensor down to the same height as the mounting groove opening, it can no longer be pressed down, thus greatly ensuring the safety of the pressure sensor without affecting its sensing and detection capabilities.

[0056] The mounting groove 20 is filled with non-Newtonian fluid 23 between the upper surface of the pressure sensor and the elastic skin.

[0057] Non-Newtonian fluids exhibit shear-thickening properties, meaning their viscosity increases with external force; therefore, the heavier the vehicle, the higher the viscosity of the non-Newtonian fluid. Since the pressure sensor is installed deep within the mounting groove, and the pressure sensor is typically circular with its corresponding circular mounting groove, there is a non-installation area between the grooves. This non-installation area has a short distance from the elastic skin, and the viscosity of the non-Newtonian fluid increases under vehicle pressure. This allows for better rigid support to be formed between the non-installation area and the elastic skin, protecting the pressure sensor. Furthermore, the properties of non-Newtonian fluids mean that the support rigidity increases with vehicle weight and pressure. This provides excellent protection for the pressure sensor even when extremely heavy vehicles pass by, preventing damage from vehicle pressure without affecting its pressure detection and signal transmission.

[0058] Therefore, this utility model can quickly detect the vehicle's dimensions, weight, and average wheel pressure on the road surface before the vehicle passes through, thereby predicting whether it can smoothly and safely pass through the target road section. This provides timely traffic data support to traffic management departments, thus minimizing the occurrence of vehicle accidents of this type. Therefore, this utility model has significant practical implications for ensuring traffic safety, protecting road facilities, and optimizing road management, and can effectively improve the overall operational efficiency and safety of the traffic system.

Claims

1. A vehicle safety passage pre-inspection system, characterized in that, This includes vehicle size safety detection devices, vehicle weight detection devices, and vehicle pressure detection devices; The vehicle size safety detection device includes a passage gate set along the width of the road surface. The passage gate includes two vertical bars set on both sides, with the distance between the two bars being greater than the vehicle safety width threshold. It also includes a height limit bar set horizontally above the two vertical bars, located at the vehicle safety height threshold position. A row of laser sensors is set along the length of the lower surface of the height limit bar. The laser sensors include a laser emitter set downward for emitting laser light and a corresponding laser detector set for receiving reflected laser light. The laser emitters are arranged in a row and are spaced apart from the corresponding rows of laser detectors. The laser detectors are connected to a control center.

2. The vehicle safety passage pre-inspection system as described in claim 1, characterized in that, A proximity switch is also provided on the inner side of the height limit bar, and the proximity switch is connected in series in the start control circuit of the laser sensor.

3. The vehicle safety passage pre-inspection system as described in claim 1, characterized in that, The vehicle weight detection device includes a horizontally arranged floating pressure plate. The floating pressure plate is supported by evenly arranged vertical springs on the road surface. A pressure rod is vertically fixed at the middle of the lower surface of the floating pressure plate. The lower end of the pressure rod can be slidably inserted into a closed detection chamber below the road surface. A pressure detection device for detecting the pressure of the pressure rod is installed in the detection chamber.

4. The vehicle safety passage pre-inspection system as described in claim 3, characterized in that, The pressure detection device includes a detection lever arranged laterally. The fulcrum of the detection lever is hinged to a lever support. The long arm end of the detection lever has a conductive section with a sliding contact. The lower end of the pressure rod is pressed against the short arm end of the detection lever. The pressure detection device also includes an arc-shaped resistor arranged in the direction of rotation of the long arm end of the detection lever. The arc-shaped resistor has a groove that slides in cooperation with the sliding contact. One end of the arc-shaped resistor and the conductive section are connected to a resistance detection circuit module, which is connected to a control center.

5. The vehicle safety passage pre-inspection system as described in claim 4, characterized in that, The upper end of the detection chamber is provided with an insertion interface for the pressure rod to be inserted, and a flexible sealing skin is provided around the insertion interface and between the pressure rod.

6. The vehicle safety passage pre-inspection system as described in claim 4, characterized in that, The floating pressure plate has a sloping ramp hinged at both its front and rear ends, which connects to the road surface.

7. The vehicle safety passage pre-inspection system as described in claim 6, characterized in that, The inclined ramp is equipped with rollers at the end where it connects to the road surface.

8. The vehicle safety passage pre-inspection system as described in claim 1, characterized in that, The vehicle pressure detection device includes two parallel detection strips corresponding to the wheels on both sides of the vehicle. The distance between the two detection strips is smaller than the distance between the inner sides of the smallest wheel of the vehicle, and the distance between the two detection strips is larger than the distance between the outer sides of the largest wheel of the vehicle. Several pressure sensors are evenly arranged in an array within the detection strips, and each pressure sensor is connected to the control center.

9. The vehicle safety passage pre-inspection system as described in claim 8, characterized in that, The detection strip is provided with an installation groove, and the pressure sensor is installed in the installation groove. An elastic skin is sealed on the upper surface of the installation groove.

10. The vehicle safety passage pre-inspection system as described in claim 9, characterized in that, The bottom of the mounting slot is equipped with a matching mounting slot for each pressure sensor. Each pressure sensor is installed in the corresponding mounting slot. When the pressure sensor is not under force, its upper surface protrudes above the upper surface of the mounting slot. When the pressure sensor is under pressure to the limit, its upper surface is lower than the upper surface of the mounting slot. The mounting slot is also filled with non-Newtonian fluid between the upper surface of the pressure sensor and the elastic skin.

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