Operation period guardrail parameter detection vehicle and detection process

Abstract

The invention discloses an operation period guardrail parameter detection vehicle and a detection process, and relates to the technical field of guardrail detection, the operation period guardrail parameter detection vehicle comprises a detection vehicle, a mechanical arm, a data acquisition system and a control system, the top of the detection vehicle is rotatably provided with the mechanical arm, and the mechanical arm is rotatably provided with a detection arm; one part of the data acquisition system is arranged on the detection arm, the other part of the data acquisition system is arranged on the detection vehicle, the control system is arranged in the detection vehicle, the mechanical arm and the data acquisition system are both in communication connection with the control system, and the data acquisition system can detect the size, appearance and coating thickness of the guardrail and the speed of the vehicle. According to the guardrail parameter detection vehicle, various data can be collected at a time, various parameters are evaluated through parameter calculation and comparison of the control system, the parameter detection of the guardrail in the operation period is convenient and rapid, and targeted maintenance can be carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of guardrail detection, and in particular to a guardrail parameter detection vehicle and a detection process during operation. Background Art

[0002] The development of highway traffic is inseparable from the synchronous development of traffic safety facilities, and traffic accidents directly endanger the safety of people's lives and property, which makes people pay more and more attention to highway safety, and also promotes the continuous improvement of highway safety evaluation standards. For guardrails, their protective performance will only really work and be actually tested when traffic accidents actually occur. The road conditions where accidents occur and the conditions of guardrails on the road are always different from those set up in the previous test sites. Therefore, the shortcomings of existing traffic safety facilities guardrails in operating roads have a gradual process of emergence.

[0003] In fact, there has always been difficulty in evaluating whether the existing traffic safety facilities and guardrails on operating roads meet the requirements of new specifications and indicators. Summary of the invention

[0004] The purpose of the present invention is to provide a guardrail parameter detection vehicle and detection process during operation to solve the problems existing in the above-mentioned prior art, so that the parameter detection of the guardrail during operation is convenient and fast, and targeted maintenance can be carried out.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a guardrail parameter detection vehicle during operation, comprising a detection vehicle, a mechanical arm, a data acquisition system and a control system. The mechanical arm is rotatably arranged on the top of the detection vehicle, and a detection arm is rotatably arranged on the mechanical arm. A part of the data acquisition system is arranged on the detection arm, and the other part is arranged on the detection vehicle. The control system is arranged in the detection vehicle, and a rotary motor is arranged between the detection arm and the mechanical arm. The mechanical arm and the data acquisition system are both communicatively connected with the control system. The data acquisition system can detect the size, appearance and coating thickness of the guardrail and the speed of the vehicle.

[0007] Preferably, the data acquisition system includes a radar speed meter, an automatic tracking and identification probe, an infrared rangefinder and a coating thickness gauge, the infrared rangefinder and the coating thickness gauge are arranged on the detection arm, the radar speed meter is arranged at the front end of the top of the detection vehicle, and the automatic tracking and identification probe is rotatably arranged on the top of the detection vehicle.

[0008] Preferably, the mechanical arm is a multi-link hydraulic mechanical arm, and the bottom of the mechanical arm is connected to the top of the inspection vehicle through a rotary drive.

[0009] Preferably, the data acquisition system is connected to the control system through a communication unit, the communication unit includes a signal sensor, a signal processor and a signal receiver, the detection arm is provided with a signal sensor and a power interface, the signal sensor is connected to the power interface, the signal processor is arranged in the detection vehicle, the signal receiver is arranged on the top of the detection vehicle, the signal sensor and the signal receiver are transmitted via wireless signals, the signal receiver and the signal processor are connected via a data line and transmit data, and the signal processor and the computer of the control system are connected via a data line and transmit data.

[0010] Preferably, the control system includes a computer and a display, and the robotic arm, the data acquisition system and the display are all communicatively connected to the computer.

[0011] Preferably, an audible and visual alarm is arranged above the display, and the audible and visual alarm is communicatively connected with the computer.

[0012] Preferably, a telescopic arm is connected to the inspection vehicle through a rotary drive, and a slope protection layer thickness measuring instrument is connected to the top of the telescopic arm. The slope protection layer thickness measuring instrument includes an infrared rangefinder and a signal sensor. The infrared rangefinder is communicatively connected to the control system through the signal sensor, and the telescopic arm is a hydraulic cylinder.

[0013] The present invention also relates to a guardrail parameter detection process during operation, which is based on the above-mentioned guardrail parameter detection vehicle during operation and specifically includes the following steps: first determining the target guardrail, then determining the evaluation period and evaluation section guardrail, and conducting on-site investigation of the guardrail design compliance; then collecting traffic data, the data to be collected include guardrail collision accidents, vehicle type composition ratio, total vehicle mass and vehicle location speed, calculating the vehicle collision energy through a computer using the collected data, drawing a vehicle collision energy cumulative percentage curve, and finally conducting a safety evaluation and providing an evaluation conclusion.

[0014] Compared with the prior art, the present invention has achieved the following technical effects:

[0015] The guardrail parameter detection vehicle of the present invention can collect multiple data at one time, and evaluate various parameters through parameter calculation and comparison of the control system, so that the parameter detection of the guardrail during the operation period is convenient and fast, and targeted maintenance can be carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of a guardrail parameter detection vehicle during operation in an embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of the top view of the structure of the guardrail parameter detection vehicle in the operation period in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of a detection vehicle collecting the coating thickness of a corrugated beam guardrail in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of a detection vehicle collecting dimensions of a corrugated beam guardrail in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of a detection vehicle collecting dimensions of a concrete guardrail in an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the detection vehicle collecting the thickness of the slope protection layer in an embodiment of the present invention;

[0023] Among them: 1-inspection vehicle, 2-mechanical arm, 3-computer, 4-display, 5-sound and light alarm, 6-hydraulic cylinder, 7-radar speed meter, 8-automatic tracking and identification probe, 9-inspection arm, 10-rotation motor, 11-infrared rangefinder, 12-coating thickness gauge, 13-power interface, 14-signal sensor, 15-signal processor, 16-signal receiver, 17-rotation drive, 18-guardrail. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The purpose of the present invention is to provide a guardrail parameter detection vehicle and detection process during operation to solve the problems existing in the prior art, so that the parameter detection of the guardrail during operation is convenient and fast, and targeted maintenance can be carried out.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Embodiment 1

[0028] like Figures 1 to 6 As shown: This embodiment provides a guardrail parameter detection vehicle during operation, including a detection vehicle 1, a mechanical arm 2, a data acquisition system and a control system. The top of the detection vehicle 1 is rotatably provided with a mechanical arm 2, and a detection arm 9 is rotatably provided on the mechanical arm 2. A part of the data acquisition system is provided on the detection arm 9, and another part is provided on the detection vehicle 1. The control system is provided in the detection vehicle 1. The mechanical arm 2 and the data acquisition system are both connected to the control system in communication. The data acquisition system can detect the size, appearance and coating thickness of the guardrail 18 and the speed of the vehicle. In this embodiment, the control system includes a computer.

[0029] As an optional solution, the data acquisition system in this embodiment includes a radar speed meter 7, an automatic tracking and identification probe 8, an infrared rangefinder 11 and a coating thickness gauge 12. The infrared rangefinder 11 and the coating thickness gauge 12 are arranged on the detection arm 9, which is convenient for measuring the height and coating thickness of the guardrail 18. The radar speed meter 7 is arranged at the front end of the top of the detection vehicle 1, which is convenient for measuring the speed of the observed vehicle. The automatic tracking and identification probe 8 is arranged on the top of the detection vehicle 1 through a rotating base, and can be rotated 360°, which is convenient for image acquisition and observation of the guardrail 18 and the vehicle. In this embodiment, the automatic tracking and identification probe 8 is connected to a computer, and the collected on-site image will be stored in the computer. The image processing software in the computer can compare the collected image with the standard image in the computer to realize the function of automatic identification and comparison.

[0030] As an optional solution, the mechanical arm 2 in this embodiment is a multi-link hydraulic mechanical arm, a hydraulic cylinder 6 is provided between adjacent support arms, and the bottom of the mechanical arm 2 is connected to the top of the detection vehicle 1 through a slewing drive 17. In this embodiment, the hydraulic cylinder 6 changes the positional relationship of the multi-link to achieve conventional movement between the mechanical arms 2. The hydraulic cylinder 6 can automatically adjust the hydraulic pressure to place the mechanical arm 2 in a set position according to the position requirements of the detection arm; the slewing drive 17 is a rotating chassis structure commonly used for mechanical arms, which can achieve 360° rotation of the mechanical arm 2.

[0031] As an optional solution, in this embodiment, a rotary motor 10 is provided between the detection arm 9 and the mechanical arm 2 to facilitate the rotation and angle adjustment of the detection arm 9 .

[0032] As an optional solution, in this embodiment, the data acquisition system is connected to the control system through a communication unit, the communication unit includes a signal sensor 14, a signal processor 15 and a signal receiver 16, the detection arm 9 is provided with a signal sensor 14 and a power interface 13, the signal sensor 14 is connected to the power interface 13, the signal processor 15 is arranged in the detection vehicle 1, the signal receiver 16 is arranged on the top of the detection vehicle 1, the signal sensor 14 and the signal receiver 16 are transmitted through wireless signals, the signal receiver 16 and the signal processor 15 are connected through a data line and transmit data, and the signal processor 15 and the computer 3 of the control system are connected through a data line and transmit data.

[0033] As an optional solution, in this embodiment, the control system includes a computer 3 and a display 4, and the mechanical arm 2, the data acquisition system and the display 4 are all communicatively connected to the computer 3. The display 4 is preferably a touch screen display, which can directly input parameters and also view detection parameters.

[0034] As an optional solution, in this embodiment, an audible and visual alarm 5 is arranged above the display 4, and the audible and visual alarm 5 is connected to the computer 3. If the structure of the guardrail 18 at the detection location does not meet the evaluation requirements, the parameter evaluation system will feed back to the computer 3, and the computer 3 will feed back the signal to the display screen in the control detection vehicle 1, and the audible and visual alarm 5 will be activated on the spot to remind the staff in the vehicle.

[0035] As an optional solution, in this embodiment, a telescopic arm is connected to the inspection vehicle 1 through a slewing drive 17, and a slope protection layer thickness measuring instrument is connected to the top of the telescopic arm. The slope protection layer thickness measuring instrument includes an infrared rangefinder 11 and a signal sensor 14. The infrared rangefinder 11 is communicated with the control system through the signal sensor 14. The telescopic arm is a hydraulic cylinder 6, and the hydraulic cylinder 6 is preferably arranged to rotate horizontally; the slewing drive 17 is a rotating chassis structure commonly used for mechanical arms, which can realize 360° rotation of the telescopic arm.

[0036] Embodiment 2

[0037] like Figures 3 to 5 As shown: This embodiment also involves a guardrail parameter detection process during operation, based on the above-mentioned guardrail parameter detection vehicle during operation, specifically including the following steps: first determine the target guardrail 18, then determine the evaluation period and evaluation section guardrail 18, and go to the site to investigate the design compliance of the guardrail 18; then collect traffic data, the data to be collected include collision guardrail accidents, vehicle type composition ratio, total vehicle mass and vehicle location speed, the collected data is used to calculate the vehicle collision energy through the computer 3, and the vehicle collision energy cumulative percentage curve is drawn, and finally a safety evaluation is performed to give an evaluation conclusion.

[0038] The specific operations of guardrail 18 and road traffic data collection and analysis are as follows:

[0039] 1 Highway basic data

[0040] Before the evaluation, the basic data of the highway section to be evaluated shall be collected and sorted, mainly including the following aspects:

[0041] 1) Evaluate the linear parameters of the road section, such as the horizontal and vertical planes and the cross section of the roadbed.

[0042] 2) Evaluate basic highway information such as the length of the road section, design speed, opening time, traffic volume and major maintenance records.

[0043] 3) Evaluate the application time, location, etc. of the guardrail 18.

[0044] 2. Guardrail Site Survey

[0045] 2.1 Guardrail design compliance

[0046] According to the changes in the construction process, the design compliance check of the guardrail 18 should be carried out. The inspection is carried out by comparing the on-site investigation with the design documents or technical standards.

[0047] Guardrail site survey content:

[0048] 1) The conformity inspection of guardrail design can refer to the "Highway Engineering Quality Inspection and Assessment Standards"

[0049] (JTGF80 / 1—2004) related requirements shall be implemented.

[0050] 2) Measure and record the guardrail type and main structural dimensions.

[0051] 3) Measure the cross-section of the roadbed where the guardrail is set, and record the settings of the roadside slopes, ditches, obstacles, etc.

[0052] 2.2 Guardrail Structural Integrity

[0053] During the application of guardrail 18, there may be a certain degree of parts loss, structural defects or corrosion. These factors may weaken or endanger the safety of the guardrail 18 structure. The following contents should be recorded in the investigation:

[0054] For metal structure guardrail 18, it is necessary to check and record whether the bolts in each part are complete, whether there is a large deformation of the steel structure, and the thickness of the anti-corrosion layer.

[0055] For concrete structure guardrail 18, it is necessary to check and record whether there are structural defects, cracks, steel bar leakage, steel bar corrosion and concrete protective layer shedding, etc.

[0056] Other structural guardrails 18 may be inspected according to relevant standards, design documents and product specifications.

[0057] 3 Guardrail collision accident

[0058] 3.1 Accident Collection Requirements

[0059] The collection of guardrail collision accidents should meet the following requirements:

[0060] 1) Investigate and record all vehicle collision accidents with guardrails during the evaluation period. In addition to accidents involving climbing over, crossing, riding over guardrails, or rollovers, scratching accidents and vehicle run-off accidents should also be investigated and recorded.

[0061] 2) Record the time, location, vehicle type, vehicle load, vehicle speed, damage to guardrails 18, casualties, vehicle damage, road conditions and weather conditions, etc.

[0062] 3.2 Survey Methods

[0063] According to the actual situation of traffic accident handling in my country, different departments have different focuses on traffic accident records. The following investigation methods can be adopted for accident investigation:

[0064] 1) Obtain the maintenance records of guardrails 18 on the evaluated road section during the evaluation period from the maintenance unit. Replacement or maintenance of guardrails 18 at the same time and place is recorded as one guardrail collision accident, and the total number of guardrail collision accidents is counted.

[0065] 2) Obtain accident files on the evaluated road section during the evaluation period from the road administration department, and count the number of accidents successfully prevented by guardrail 18.

[0066] 3) When collecting accident data, you can first take photos of the above information, and then organize the data based on the photos.

[0067] 4. Model composition ratio

[0068] 4.1 Model Classification Standards

[0069] Vehicle types are divided into 9 categories, and the specific classification standards are shown in Table 4.1.

[0070] Table 4.1 Vehicle classification standards

[0071]

[0072] 4.2 Survey Method

[0073] There are three ways to obtain the proportion of each vehicle type on the evaluation section during the evaluation period:

[0074] 1) If a traffic volume monitoring station is set up on the evaluation section, the vehicle type ratio on the evaluation section during the evaluation period can be directly obtained from the management department.

[0075] 2) Obtain toll records for the entire evaluation period or part of it (not less than 1 month) from the main toll station on the evaluation section, and calculate the proportion of each vehicle type.

[0076] 3) Use on-site survey to obtain the proportion of each vehicle type.

[0077] ①Investigation principles:

[0078] a. On-site investigation should be carried out on weekdays; b. Investigation sites should be evenly distributed on the evaluated road section.

[0079] ②Survey method:

[0080] a. Photography method, deploying cameras to shoot and record, and then making statistics based on the camera records; b. Manual observation method, manual on-site recording, investigation and forming a record sheet.

[0081] 5. Gross Vehicle Mass

[0082] The gross vehicle mass of each sample in the location speed measurement is replaced by the average gross vehicle mass of the corresponding model according to the vehicle type classification standard in Table 4.1.

[0083] 5.1 Calculation method

[0084] The average total vehicle mass of each model is calculated using formula (5.1).

[0085]

[0086] 5.2 Survey Method

[0087] There are two ways to obtain vehicle weight information:

[0088] 1) Obtain vehicle weight record data at the toll station exit on the main route during the evaluation period.

[0089] 2) On-site data collection.

[0090] 6 Vehicle location speed

[0091] The collision speed of a vehicle mainly depends on the running speed of the vehicle. Taking into account factors such as the braking measures taken by the driver during the collision, according to relevant research data, the collision speed is taken as 0.8 times the running speed. The running speed of the vehicle is investigated by the method of local speed measurement.

[0092] 6.1 Site selection

[0093] The location speed measurement points can be selected according to the actual length of the evaluation section, and in principle, there should be no less than 3. The following principles should be followed when selecting speed measurement points:

[0094] 1) According to the statistical results of collision guardrail accident data, when there are obvious accident-prone points on the evaluated road section, the accident-prone points should be considered as speed measurement points.

[0095] 2) For evaluation sections where accident-prone points are difficult to identify, the evaluation sections can be divided according to the section division requirements of the "Guidelines for Highway Project Safety Evaluation" (JTG / TB05-2004), and characteristic points or points that are likely to cause speed changes can be used as speed measurement points.

[0096] 3) Speed ​​measuring points should be evenly distributed on the evaluation section.

[0097] 6.2 Determining the sample size

[0098] The objects of speed measurement at the location should include the various types of vehicles listed in Table 4.1, and the sample size is determined as follows:

[0099] The total sample size (ns) of speed measurement at a location should not be less than 800. Let ni (i = 1, 2, 3, ...) be the sample size of various types of vehicles at the ith speed measurement point, then ni should not be less than 200 vehicles, and the proportion of the sample size of each type of vehicle in ni must be the same as the proportion of the vehicle types on the evaluation section during the evaluation period.

[0100] 6.3 Investigation methods and precautions

[0101] 1) Location speed survey: A radar speed meter 7 or a related traffic information collection system can be used to measure the location speed, and the measurement results are recorded in a table.

[0102] 2) When measuring speed at a location, try to avoid being noticed by the driver so as not to affect the driver's normal driving and the authenticity of the measurement results.

[0103] 3) When using a radar speedometer 7 to measure speed, the angle between the speedometer and the observation vehicle should be as small as possible to reduce measurement errors. Generally, when observing two observation vehicles for distance positioning, the azimuth angle between the two observation vehicles should be greater than 30° and less than 150°; the speedometer uses the Doppler effect of waves to measure the frequency difference between the transmitted wave and the echo, and then the moving speed of the vehicle can be calculated.

[0104] 4) The investigation should be conducted away from unusual traffic times, such as maintenance, holidays, and bad weather.

[0105] 7 Comparative analysis and evaluation of data

[0106] 7.1 After obtaining all the system data that need to be collected, compare and analyze them with the standard data previously input into the parameter input system. The comparison data input into the parameter input system include the design specification guardrail 18 structure and specification size parameters, the design specification guardrail protection energy E0, the horizontal and vertical sections of the road section, the roadbed cross-section and other linear parameters, the length of the road section, the design speed, the opening time and the overhaul record, the application time and position of the guardrail 18, the collision guardrail accidents that occurred, the standard vehicle model and other parameters.

[0107] The collected data and the comparison data enter the parameter calculation system, and the analysis includes three aspects: guardrail design compliance, rationality of guardrail protection level and guardrail road traffic adaptability. Guardrail design compliance: the collected guardrail structure dimensions (such as whether there are missing components, effective height relative to the road surface and transition smoothness, etc.), coating thickness and the comparison data entered in the computer 3 (such as design documents, change documents and design specifications, etc.) are compared and analyzed.

[0108] Reasonableness of guardrail protection grade: According to the highway grade, design speed, roadside danger, traffic volume, traffic composition and operating speed of the application section, it is judged whether the guardrail 18 designed for this section is sufficient to meet the protection requirements (for example, when the design specification requires the slope height to be less than 3.5m, a Class A guardrail can be designed, but it is not enough to protect vehicles in small radius sections, and it is easy to run off the road when turning, so it should be designed according to the actual road conditions). Therefore, the rationality of the selection of guardrail protection grade should be evaluated according to the actual road traffic conditions during the highway operation stage.

[0109] Guardrail road traffic adaptability: The guardrail structure that meets the requirements of the full-scale collision test of the "Highway Guardrail Safety Performance Evaluation Standard" (JTG B05-01-2013) only needs to meet the blocking function, buffering function and guiding function under the specified test collision conditions. In the actual highway operation process, there are many actual collision conditions for vehicles to collide with guardrails. At the same time, the movement state of the vehicle during the collision with the guardrail will also be affected by the roadside slope, ditch and other roadside obstacles. Therefore, the safety performance of the guardrail 18 under actual road traffic conditions may be different from the results of the full-scale collision test of the actual vehicle. The evaluation of the protective effect of highway guardrails in actual applications is mainly carried out from the perspective of vehicle collision guardrail accidents.

[0110] Through the analysis of the above collected data and comparative data, the parameter calculation system is entered, including the calculation of the guardrail successful protection accident rate Rs and the calculation of the percentage m of vehicles with vehicle collision energy less than or equal to the guardrail design protection energy (E0) in the total sample size.

[0111] Among them, the guardrail successful protection accident rate Rs = the number of successful guardrail collision protection accidents / the total number of guardrail collision accidents.

[0112] The vehicle collision energy is calculated using formula (7.1) when the vehicle collides with the guardrail:

[0113]

[0114] In the formula, E i -The collision energy of the i-th vehicle (kJ);

[0115] m i -The average total vehicle mass of the corresponding vehicle model of the i-th vehicle (t);

[0116] v i - The collision speed of the i-th vehicle (m / s), calculated as 0.8 times the location speed;

[0117] α-average vehicle collision angle (°), calculated as 15° based on the investigation results of previous vehicle collision guardrail accidents.

[0118] The guardrail design protection energy E0 (specified in the "Highway Guardrail Safety Performance Evaluation Standard") is compared to see whether the vehicle collision energy is less than or equal to the guardrail design protection energy E0.

[0119] 7.2 After the calculation is completed, the calculation data is transmitted to the parameter evaluation system through computer 3:

[0120] The parameter evaluation system includes

[0121] 1) The evaluation criteria for the rationality of the guardrail protection level are: the percentage m of vehicles with collision energy less than or equal to the guardrail design protection energy E0 in the total sample volume is greater than or equal to 85%;

[0122] 2) The evaluation criteria for the road traffic adaptability of guardrails are: the guardrail successful protection accident rate Rs is greater than or equal to m;

[0123] 3) The parameter evaluation system also evaluates the design compliance of the guardrail and compares and analyzes the collected data with the comparison data.

[0124] When the guardrail structure at such a location does not meet the evaluation requirements, the parameter evaluation system will feed back to the computer 3, and the computer 3 will feed back the signal to control the display screen in the detection vehicle 1 to activate the sound and light alarm 5 on the spot.

[0125] When the speed of the inspection vehicle 1 is slow, a drainage guidance system can be set on the back. The drainage guidance system is connected to the signal processor 15 by a data cable. The drainage guidance system includes horn sound drainage and luminous arrow drainage. When the inspection vehicle 1 is automatically inspected, the computer 3 system will convey the signal to the signal processor 15, and the signal processor 15 will immediately start the drainage guidance system to prevent the rear vehicle from colliding with it.

[0126] This embodiment can evaluate the performance of the highway guardrail form (application time should not be less than 1 year) in the road traffic environment during the operation stage through the evaluation of the full-scale collision test of the actual vehicle or the standard and specification, and evaluate the safety of the guardrail 18 based on the actual road traffic conditions, guardrail protection level, guardrail structure size and collision guardrail accident situation of the standard section, guardrail transition section and central median opening guardrail in the application section. Since there is currently no method for evaluating the safety of the guardrail 18 in the highway operation stage in my country, especially for evaluating the guardrail 18 when it is applied, when the road is in operation and it is not feasible to remove the guardrail 18 for evaluation, the inspection vehicle of this embodiment can be used. On the one hand, the safety evaluation of the guardrail 18 can facilitate the information collection and highway maintenance of the management department, and on the other hand, it can prevent accidents before they happen. To evaluate whether the guardrail 18 can meet the road traffic safety requirements of the application section, it is necessary to combine the actual road traffic conditions and collision guardrail accidents and conduct inspections through the safety evaluation of the guardrail in the operation stage.

[0127] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A guardrail parameter detection vehicle during operation, characterized in that: The invention comprises an inspection vehicle, a mechanical arm, a data acquisition system and a control system. The mechanical arm is rotatably arranged on the top of the inspection vehicle, and an inspection arm is rotatably arranged on the mechanical arm. A part of the data acquisition system is arranged on the inspection arm, and another part is arranged on the inspection vehicle. The control system is arranged in the inspection vehicle. A rotary motor is arranged between the inspection arm and the mechanical arm. The mechanical arm and the data acquisition system are both communicatively connected with the control system. The data acquisition system can detect the size, appearance and coating thickness of the guardrail and the speed of the vehicle.

2. The guardrail parameter detection vehicle during operation period according to claim 1 is characterized in that: The data acquisition system includes a radar speed meter, an automatic tracking and identification probe, an infrared rangefinder and a coating thickness gauge. The infrared rangefinder and the coating thickness gauge are arranged on the detection arm, the radar speed meter is arranged at the front end of the top of the detection vehicle, and the automatic tracking and identification probe is rotatably arranged on the top of the detection vehicle.

3. The guardrail parameter detection vehicle during operation period according to claim 1 is characterized in that: The mechanical arm is a multi-link hydraulic mechanical arm, and the bottom of the mechanical arm is connected to the top of the inspection vehicle through a rotary drive.

4. The guardrail parameter detection vehicle during operation period according to claim 1 is characterized in that: The data acquisition system is connected to the control system through a communication unit, and the communication unit includes a signal sensor, a signal processor and a signal receiver. The detection arm is provided with a signal sensor and a power interface, the signal sensor is connected to the power interface, the signal processor is arranged in the detection vehicle, and the signal receiver is arranged on the top of the detection vehicle. The signal sensor and the signal receiver are transmitted through wireless signals, the signal receiver and the signal processor are connected through a data line and transmit data, and the signal processor and the computer of the control system are connected through a data line and transmit data.

5. The guardrail parameter detection vehicle during operation period according to claim 1 is characterized in that: The control system includes a computer and a display, and the mechanical arm, the data acquisition system and the display are all connected to the computer for communication.

6. The guardrail parameter detection vehicle during operation period according to claim 5 is characterized in that: An audible and visual alarm is arranged above the display, and the audible and visual alarm is communicatively connected with the computer.

7. The guardrail parameter detection vehicle during operation period according to claim 5 is characterized in that: The inspection vehicle is connected to a telescopic arm through a rotary drive, and the top of the telescopic arm is connected to a slope protection layer thickness measuring instrument. The slope protection layer thickness measuring instrument includes an infrared rangefinder and a signal sensor. The infrared rangefinder is communicatively connected to the control system through the signal sensor, and the telescopic arm is a hydraulic cylinder.

8. A guardrail parameter detection process during operation period, based on the guardrail parameter detection vehicle during operation period according to any one of claims 1 to 7, characterized in that: Specifically, the steps include: first determine the target guardrail, then determine the evaluation period and evaluation section guardrail, and conduct on-site investigation on the design compliance of the guardrail; then collect traffic data, including guardrail collision accidents, vehicle type composition ratio, total vehicle mass and vehicle location speed; calculate the vehicle collision energy through a computer using the collected data, draw a cumulative percentage curve of the vehicle collision energy, and finally conduct a safety evaluation and give an evaluation conclusion.

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