Road FWA intelligent detection vehicle

Abstract

The invention relates to the technical field of road surface detection, in particular to an FWA intelligent detection vehicle for a road. Through a drop hammer, an acceleration sensor and a data acquisition instrument on the detection vehicle, through free falling of the drop hammer, acceleration during hammering of a road surface is acquired and analyzed, whether a void area exists in a road structure layer or not and the size of the void area are determined, and data of a cloud platform can be uploaded through an acquisition terminal. The nondestructive detection and the digital detection of the road void are realized, and the detection speed and the detection accuracy are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of road detection, and particularly to a road FWA intelligent detection vehicle for detecting voids, pavement bearing capacity, road diseases, and fatigue performance of asphalt roads and cement roads. Background Art

[0002] In the process of road construction and maintenance, accurately detecting various performance indicators of roads is crucial for ensuring road quality and service life.

[0003] Currently, for non-destructive detection of road diseases, such as deflection, radar, etc., existing detection instruments have problems such as low detection accuracy, low detection efficiency, and complex operation.

[0004] Traditional detection equipment requires on-site manual operation, and the detection results are greatly affected by environmental factors; the deflection value detection equipment is bulky and inconvenient for transportation and use. These problems severely restrict the efficient development of road detection work and cannot meet the requirements of modern road construction and maintenance for rapid and accurate detection.

[0005] Patent No. "2024104909360" and patent name "A shear wave impact source device and a subgrade disease detection system" disclose a non-destructive comprehensive detection system for quickly detecting subgrade diseases through a shear wave impact source device. The problems it has are that a spring hammer and a shear wave impact source device are used to achieve the response to diseases, the accuracy and loss problems of the spring hammer, and arranging shear wave detection sensors on the target base layer, resulting in a more cumbersome detection layout. At the same time, the accuracy problem will cause large fluctuations in the detection data. Summary of the Invention

[0006] In view of this, to solve the problems of low detection accuracy, low efficiency, and complex operation existing in existing road non-destructive detection instruments, the present invention provides a road FWA intelligent detection vehicle, which can quickly and accurately detect the void degree and structural strength of the road. This vehicle is suitable for detecting the void degree and structural layer strength of old cement pavements and asphalt pavements of all grades.

[0007] To solve the problems existing in the prior art, the technical solution of the present invention is as follows: A road-use FWA intelligent detection vehicle, characterized in that a drop hammer and a data acquisition system are provided on the detection vehicle. The drop hammer is arranged on the detection vehicle through a pair of guide rails, and the free fall movement of the drop hammer on the pair of guide rails is realized by driving a chain through a motor. The data acquisition system includes a data processing module and a data acquisition instrument. The data acquisition instrument is an acceleration sensor, which is used to collect the impact acceleration signal during the impact process of the drop hammer, transmit the data to the data processing module, and the data processing module inversely calculates the road deformation and stiffness. The data processing module uploads the processed data to the cloud platform. The data acquisition instrument is connected with a GPS and a display module. The detection vehicle controls the driving and steering of the detection vehicle respectively and simultaneously through two motors, and the motors are controlled by a remote controller.

[0008] Further, two parallel drop hammer hooks are arranged on the drop hammer, a chain hook is arranged on the chain, and the chain hook and the drop hammer hook cooperate with each other.

[0009] Further, buckles are fixedly arranged on the left and right sides of the drop hammer respectively, and the buckles on the left and right sides are respectively clamped on the guide rails.

[0010] Further, the acceleration sensor is arranged on the top of the drop hammer.

[0011] Further, a continuously variable speed controller is also arranged on the detection vehicle to adjust and control the speed of the motor, so as to drive the chain to adjust the drop hammer frequency.

[0012] Further, a switch and a 4G antenna are also connected to the data acquisition instrument.

[0013] Further, the weight of the drop hammer is 30 kg, 50 kg or 100 kg.

[0014] Compared with the prior art, the advantages of the present invention are as follows: 1. In the present invention, the motor drives the chain to make the drop hammer realize free fall movement. The chain drives the drop hammer to detect, which is significantly superior to hydraulic transmission in terms of high-precision requirements, high-frequency detection, low-cost maintenance and adaptability to harsh environments, and is especially suitable for industrial quality inspection, material research and development and small and medium-sized structure detection scenarios.

[0015] 2. Buckles are respectively arranged on both sides of the drop hammer of the present invention to prevent the drop hammer from swinging during the falling process and affecting the detection results.

[0016] 3. High-precision detection: The present invention uses an acceleration sensor and an accurate heavy hammer free fall mechanism to accurately detect the deformation and stiffness of the road surface under dynamic load, and provide high-precision detection data.

[0017] 4. Multi-functional integration: The present invention integrates multiple functions such as data acquisition, dynamic load application, and deformation detection, and can meet different road detection requirements.

[0018] 5. Convenient operation: The design of the present invention is simple and easy to implement. Operators can easily complete complex detection tasks without professional background, improving work efficiency.

[0019] 6. Real-time feedback: The present invention uses a data acquisition instrument and a data processing module to analyze and process detection data in real time, and immediately displays the detection results, facilitating on-site staff to promptly understand the road conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present invention.

[0021] Figure 2 is a top view of the remote control of the present invention.

[0022] Figure 3 is a block diagram of the structure of the control part of the present invention.

[0023] Figure 4 is a schematic structural diagram of the free fall motion of the drop hammer driven by the chain of the present invention.

[0024] Marking description: 1 - data acquisition system; 2 - switch; 3 - 4G antenna; 4 - GPS; 5 - acceleration sensor; 6 - drop hammer; 7 - motor; 8 - motor; 9 - power supply; 10 - chain; 11 - structural frame; 12 - lever; 13 - drop hammer lifting lever; 14 - front and rear rocker arms; 15 - left and right rocker arms; 16 - remote control display screen; 17 - remote control switch; 18 - buckle; 19 - guide rail; 20 - chain hook; 21 - drop hammer hook. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] The present invention provides a road FWA intelligent detection vehicle. As Figure 1 shown, a pair of guide rails are provided on the detection vehicle, and a drop hammer 6 is arranged in the middle of the guide rails. The drop hammer 6 is driven by a motor 8 to control the free fall motion on a pair of guide rails through a chain 10; two parallel drop hammer hooks 21 are arranged on the drop hammer 6, and a chain hook 20 is arranged on the chain 10. The chain hook 20 and the drop hammer hook 21 cooperate with each other. During the rotation of the chain, the drop hammer is lifted to the position of the rotating shaft at the top of the chain through the preset chain hook 20, and then the drop hammer hook 21 is disengaged from the chain hook 20, and the drop hammer freely falls to impact the road structure. As Figure 4As shown in the figure. The drop hammer hook 21 and the chain hook 20 both adopt existing hooks. On the left and right sides of the drop hammer 6, buckles 18 are respectively fixed. The buckles on the left and right sides are respectively clamped on the guide rail 19 to prevent the drop hammer from swinging during the falling process. The lifting method of the drop hammer is to lift it by the rotation of the chain 10. The chain is driven by the motor 8, and its speed can be controlled by the stepless speed controller according to the on-site requirements, so as to drive the chain to adjust the drop hammer frequency.

[0027] The data acquisition system includes a data processing module and a data acquisition instrument 1. The data acquisition instrument is an acceleration sensor, which is set at the top of the drop hammer 6 and is used to collect the impact acceleration signal during the drop hammer impact process. The data processing module in the data acquisition instrument calculates the road deformation and stiffness by inversion. The data processing module uploads the processed drop hammer impact acceleration, impact dynamic displacement and impact stiffness data to the computer cloud platform or the mobile app port. The data acquisition instrument 1 is connected with a GPS 4, a display module, a switch 2, and a 4G antenna 3, as Figure 3 shown.

[0028] The driving of the inspection vehicle is controlled by two motors 7 respectively to control the driving and steering of the inspection vehicle at the same time. The motors are controlled by a remote controller. The remote controller is provided with a drop hammer lifting lever 13, a front and rear rocker 14, a left and right rocker 15, and a remote controller display screen 16. The remote controller is turned on through a switch. The motor 7 is controlled by the remote controller, as Figure 2 shown.

[0029] The above drop hammer 6 can select different weights according to different situations, such as 30 kg, 50 kg or 100 kg.

[0030] The data display and calculation of the present invention are presented by the data acquisition instrument. The data acquisition instrument has the functions of collecting acceleration sensor signals and voltage signals, and can browse, store stably and forward the collected data efficiently in real time. At the same time, by accurately processing the RTK differential signal, the positioning accuracy can reach the centimeter level. Through the cooperation of the subscription and publishing functions with the MQTT cloud server, the rapid transmission and publishing of GPS information and acceleration signals are realized.

[0031] In the field of the present invention, the parameters of the data acquisition instrument 1 can be modified in real time according to the different masses and falling heights of the drop hammers, and parameters such as the sampling frequency, the filtering cut-off frequency, and the signal capture threshold can be set. The dynamic impact signal will be displayed in real time below the display area. At the same time, the acceleration of the drop hammer impact, the impact dynamic displacement, and the impact stiffness curves and their respective characteristic values will be intercepted and displayed in real time according to requirements. The three-dimensional coordinates of the impact test points will also be displayed in real time in the lower right corner area. Each impact result will be saved in real time to the local storage of the acquisition instrument, and on-site technicians can retrieve the acquired signals in real time for index analysis. At the same time, it can be connected to 4G / 5G signals, so as to upload the on-site test data to the cloud in real time, and finally realize remote data reading and analysis.

[0032] Through the drop hammer and the data acquisition system on the inspection vehicle of the present invention, the acceleration when the hammer strikes the road surface is collected and analyzed by the free fall of the drop hammer, so as to determine whether there is a void area in the road structural layer and the size of the void area. And data can be uploaded to the cloud platform through the acquisition terminal, realizing non-destructive detection and digital detection of road voids, improving the detection speed and accuracy.

[0033] The present invention is a high-tech device dedicated to quantitatively analyzing the degree of void and structural strength of old roads. The device lifts heavy hammers of different masses to a certain height and then freely drops them to generate impact forces and act on the road surface, thereby applying pulse loads to the road surface. Such loads will cause instantaneous deformations on the road surface. At the same time, the acceleration sensor will accurately detect the deformations on the surface of the structural layer and measure the dynamic deformations and stiffness generated under dynamic loads.

[0034] 1. Install the drop hammer, acceleration sensor, data acquisition instrument, positioning device, etc. on the modified electric vehicle according to the corresponding positions, adjust the speed of the drop hammer to an appropriate speed, and adjust the corresponding parameters on the acquisition instrument according to the mass and height of the drop hammer.

[0035] 2. Use the remote control to drive the debugged device to the designated detection position, start the drop hammer, and the drop hammer freely falls from the designated height to apply a pulse load to the road surface.

[0036] 3. Such loads will cause instantaneous deformations on the road surface. At the same time, the acceleration sensor will accurately detect the deformations on the surface of the structural layer and measure the dynamic deformations and stiffness generated under dynamic loads.

[0037] The measured data will be transmitted to the data acquisition instrument through the transmission line, and the data acquisition instrument will transmit the data to a specific digital platform through the 4G antenna.

[0038] Through these test data, the modulus of the pavement structural layer can be scientifically back-calculated, and then the bearing capacity of the pavement can be accurately evaluated. This process provides important data support and a scientific basis for road maintenance and repair.

[0039] The detection accuracy of the present invention is high. Through high-precision sensors and advanced algorithms, the detection accuracy of parameters such as pavement bearing capacity, deformation value, and disease degree is greatly improved. The detection efficiency is high. The multi-sensor fusion technology and high-performance processors can achieve rapid data acquisition and analysis processing, and the detection efficiency is significantly improved. The operation is simple. The design of the touch screen makes it easy for operators to get started, reducing the operation difficulty, and the crawler-type equipment is suitable for various complex road conditions.

[0040] Through scientific detection methods and precise data processing, the present invention ensures the accuracy and reliability of the detection results, providing strong data support for road maintenance.

[0041] The above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art in the technical field, without departing from the principle of the present invention, if they make several improvements and refinements to it, they should all be regarded as within the protection scope of the present invention.

Claims

1. Road FWA intelligent detection vehicle, characterized in that, The test vehicle is equipped with a drop hammer (6) and a data acquisition system. The drop hammer (6) is arranged on the test vehicle through a pair of guide rails, and the free fall movement of the drop hammer (6) on a pair of guide rails (19) is realized by driving a chain (10) through a motor (8); the data acquisition system includes a data processing module and a data acquisition instrument (1). The data acquisition instrument (1) is an acceleration sensor, which is used to collect the impact acceleration during the drop hammer impact, transmit the data to the data processing module, and the data processing module calculates the road deformation and stiffness by inverse calculation. The data processing module uploads the processed data to the cloud platform. A GPS (4) and a display module are connected to the data acquisition instrument (1); the test vehicle controls the driving and steering of the test vehicle respectively and simultaneously through two motors (7), and the motors (7) are controlled by a remote controller.

2. The road FWA intelligent detection vehicle according to claim 1, characterized in that Two parallel drop hammer hooks (21) are arranged on the drop hammer (6), and a chain hook (20) is arranged on the chain (10), and the chain hook (20) and the drop hammer hook (21) cooperate with each other.

3. The road FWA intelligent detection vehicle according to claim 1 or 2, characterized in that, Clasps (18) are fixedly arranged on the left and right sides of the drop hammer (6), and the clasps on the left and right sides are respectively clamped on the guide rails (19).

4. The road FWA intelligent detection vehicle according to claim 3, characterized in that, The acceleration sensor is arranged on the top of the drop hammer (6).

5. The road FWA intelligent detection vehicle according to claim 4, characterized in that, A continuously variable speed controller is also arranged on the test vehicle to adjust and control the speed of the motor (8), so as to drive the chain (10) to adjust the drop hammer frequency.

6. The road FWA intelligent detection vehicle according to claim 5, characterized in that, A switch (2) and a 4G antenna (3) are also connected to the data acquisition instrument (1).

7. The road FWA intelligent detection vehicle according to claim 6, characterized in that, The weight of the drop hammer (6) is 30 kg, 50 kg or 100 kg.

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