Pavement water permeability automatic detection device and detection method thereof

Abstract

The invention provides an automatic pavement water seepage performance detection device and a detection method thereof. The detection device comprises a water seepage instrument; the detection equipment comprises a supporting frame, a data acquisition unit and a control unit, the data acquisition unit and the control unit are arranged on the supporting frame, and the data acquisition unit comprises a liquid level sensor and a temperature sensor; the control unit comprises a display control device and a wireless communication device, and the display control device is in wireless signal connection with the data acquisition unit through the wireless communication device; and the power supply is arranged on the detection equipment and is electrically connected with the detection equipment. The method has the beneficial effects that the liquid level height of the water seepage instrument is automatically detected, the pavement water seepage coefficient is calculated, the result is accurate, the precision is high, and the repeatability is good; the water seepage coefficient is converted into digital information for unified management.

Description

Technical Field

[0001] The present invention relates to the technical field of road surface detection, and more specifically, to an automatic detection device for water seepage performance of road surfaces such as bridges, tunnels, and highways. Background Art

[0002] As the asphalt pavement structure is subjected to far more severe water erosion than the road surface, the water pressure generated by the water on the road surface under the tires of high-speed vehicles can directly penetrate the asphalt surface layer. In order to minimize the water damage to the pavement structure layer, this requires that the interlayer bonding material of the asphalt pavement is not only highly water-tight, but also has a certain ability to resist water damage. At present, in road construction, a pavement water permeability meter is usually used to measure the amount of water that penetrates into a certain area of ​​the pavement per unit time. This is used as the pavement water permeability coefficient to evaluate the pavement's water permeability performance, thereby reflecting the gradation composition of the pavement asphalt mixture and other conditions. The highway engineering water permeability coefficient has become an important indicator for evaluating pavement performance. At present, the determination of water seepage coefficient of highway projects is mainly based on the relevant methods of "Highway Roadbed and Pavement Field Test Procedure" (JTG3450-2019) T0971-2019, and traditional water seepage equipment is used for testing. For example, Chinese patent 202310853565.3 discloses a water seepage detection device for bridge pavement. The application replaces the traditional mud packaging base and pavement with a wax ring seal, and the wax ring is shaped by a molding component. This water seepage equipment needs to be manually inspected, and there are disadvantages such as manual acquisition and filling of detection section information, insufficient data detection frequency, and insufficient detection time. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides an automatic detection device for road surface water seepage performance to solve the technical problems in the background technology that manual operation is required and the test results are inaccurate.

[0004] To solve the above problems, the technical solution adopted in this application is: A device for automatically detecting water seepage performance of a road surface, characterized in that it comprises: Water seepage meter; The detection device comprises a support frame and a data acquisition unit and a control unit arranged on the support frame, wherein the data acquisition unit comprises a liquid level sensor for detecting the liquid level in the detection cylinder; the control unit comprises a display control device and a wireless communication device, and the display control device is connected to the data acquisition unit by wireless signals via the wireless communication device; and A power supply is arranged on the detection device and is electrically connected to the data acquisition unit and the control unit of the detection device, and is used to provide power to each unit of the detection device.

[0005] As a preferred embodiment of the present application, the water seepage meter includes a mounting seat and a detection cylinder arranged on the mounting seat, and a water containing cavity is provided on the surface of the mounting seat facing the road surface; and a water outlet channel for connecting to the water containing cavity is provided at the bottom of the detection cylinder.

[0006] As a preferred embodiment of the present application, the water seepage meter also includes a fixing frame and a weighted steel ring, the fixing frame includes a column bracket arranged on the mounting seat and a top plate arranged on the top of the column bracket, the top plate is provided with a threaded hole for fixing the detection cylinder, the detection cylinder is vertically inserted through the threaded hole and is threadedly connected to the top plate, and the detection cylinder is connected to the mounting seat through a water outlet channel; the weighted steel ring is sleeved on the outside of the fixing frame and presses the top surface of the mounting seat, so as to apply downward pressure to the mounting seat so that the surface of the mounting seat facing the road surface is pressed against the road surface.

[0007] As a preferred embodiment of the present application, an exhaust hole is provided on the top surface of the mounting seat away from the road surface, and the exhaust hole is communicated with the water containing cavity of the mounting seat.

[0008] As a preferred embodiment of the present application, the data acquisition unit further comprises a mounting substrate. The mounting substrate is in the shape of a rectangular plate and is detachably mounted on the top of the support frame.

[0009] As a preference of the present application, the liquid level sensor is a non-contact liquid level sensor, and the liquid level sensor is suspended directly above the detection cylinder to detect the liquid level height in the detection cylinder.

[0010] As a preferred embodiment of the present application, the liquid level sensor is a radar liquid level sensor. The radar liquid level sensor is suspended directly above the detection tube, with its detection head aimed at the inside of the detection tube, and transmits high-frequency electromagnetic waves (usually microwaves or millimeter waves) through the antenna. These electromagnetic waves propagate at the speed of light in space. When the electromagnetic wave encounters the liquid surface in the detection tube, reflection occurs, and the reflected electromagnetic wave is received by the receiver of the radar liquid level sensor. By measuring the time difference from the emission to the reception of the electromagnetic wave, multiplying it by the speed of light, and then dividing it by 2 (because the electromagnetic wave is a round trip), the distance from the radar level meter to the liquid surface can be calculated, thereby realizing the measurement of the liquid level in the detection tube. The accuracy of the radar liquid level sensor is required to be within the range of ±0.5mm, which can make the reading of the water seepage meter within the error range of 1mL.

[0011] As a preferred embodiment of the present application, the data acquisition unit further includes a GNSS positioning module, which is arranged on the mounting substrate and connected to the display control device via a wireless communication device. The GNSS positioning module is mainly used to locate the current detection point, and then combined with the horizontal curve coordinates of the project, obtain the real-time pile number and offset to facilitate the automatic generation of test detection records, avoiding the drawback of too vague pile number records in traditional construction.

[0012] As a preferred embodiment of the present application, the control unit also includes a calibration unit, which is configured to determine whether the display control device has received the correction instruction, and is also configured to correct the data output by the data acquisition unit when it is determined that the display control device has received the correction instruction.

[0013] As a preferred embodiment of the present application, the data acquisition unit further includes a temperature sensor for measuring the ambient temperature. Since the radar level sensor uses electromagnetic waves for testing, and there is a certain relationship between the propagation speed of electromagnetic waves and temperature, in order to further improve the test accuracy of the automatic detection device for road water seepage performance, the measurement results can be further calibrated. The temperature sensor can test the temperature under different environments, and then further calibrate the detection data of the radar level sensor.

[0014] As a preferred embodiment of the present application, the data acquisition unit also includes a distance measuring sensor, which is arranged on a mounting substrate and connected to a display control device via a wireless communication device, and is used to automatically detect the distance between structures on both sides of a road surface to calibrate the offset.

[0015] As a preferred embodiment of the present application, the wireless communication device includes a Bluetooth module and a network communication module. The display control device is communicated with the data acquisition unit via the network communication module, and is used to automatically transmit the collected data to the display control device, generate detection records and calculate the pavement permeability coefficient, so as to facilitate management personnel to perform data analysis; the display control device is communicated with the mobile terminal via the Bluetooth module, and the detection personnel can communicate with the Bluetooth module of the detection device via the Bluetooth of the mobile terminal to obtain detection information in real time.

[0016] As a preferred embodiment of the present application, the power source includes a solar panel and a battery, the solar panel is arranged on the mounting substrate, the battery is arranged on the platform, and the solar panel is electrically connected to the battery.

[0017] As a preferred embodiment of the present application, the display control device includes a controller, a display screen and an input keyboard. The display screen is embedded in the platform to display the current test duration in real time, replacing the stopwatch of traditional construction. It can also display the pavement permeability coefficient test results, pile number information, battery power, signal transmission information status and other contents; the input keyboard is connected to the controller and the display screen to realize human-computer interaction and manually input the pile number offset information when the GNSS signal fluctuates.

[0018] As a preferred embodiment of the present application, the support frame includes a base and a telescopic bracket, the bottom of the telescopic bracket is connected to the base, the top of the telescopic bracket is connected to the data acquisition unit, and the middle of the telescopic bracket is connected to the operating unit.

[0019] As a preferred embodiment of the present application, the telescopic bracket includes at least two connecting tubes which are socketed with each other, the bottom of the last connecting tube is fixedly connected to the base, and the upper part of the first connecting tube is fixedly connected to the data acquisition unit; each connecting tube has an upper and a lower positioning hole on its wall, and each connecting tube is connected to an adjacent connecting tube through a connecting piece.

[0020] As a preferred embodiment of the present application, the cross section of the base is in an arc shape. The water seepage meter can be placed in the depression of the base, and the data acquisition unit is located directly above the water seepage meter, and the radar liquid level sensor automatically detects the liquid level in the detection cylinder of the water seepage meter below, records the time, and calculates the road surface water seepage rate.

[0021] As a preferred embodiment of the present application, the automatic detection device for road surface water permeability also includes a liquid level auxiliary correction mechanism for assisting in correcting the liquid level data in the detection cylinder.

[0022] As a preferred embodiment of the present application, the liquid level auxiliary correction mechanism is a ruler, a laser ranging sensor or a radar liquid level sensor.

[0023] As a preferred embodiment of the present application, the liquid level auxiliary correction mechanism is a laser ranging sensor or a radar liquid level sensor.

[0024] As a preferred embodiment of the present application, the liquid level auxiliary correction mechanism is a ruler.

[0025] As a preferred embodiment of the present application, the automatic detection device for road surface water seepage performance also includes a storage box for accommodating a water seepage meter and detection equipment for easy carrying.

[0026] The present invention also provides a detection method using the automatic detection device for road surface water seepage performance, characterized in that it comprises the following steps: Select at least one flat area without obvious cracks on the road surface to be tested as the test point, and clean up the dust and debris at the test point; An automatic road permeability detection device is installed at the detection point, and a sealing material is filled between the edge of the base of the water seepage meter and the road surface at the detection point to ensure that the base of the water seepage meter and the road surface at the detection point are completely sealed; Fill the detection cylinder with water and exhaust air until the water-containing cavity of the base of the water seepage meter is filled with water, the detection device is started, and the data acquisition unit detects the ambient temperature T, the initial liquid level h1 in the detection cylinder before correction, the measured liquid level h2 in the detection cylinder before correction, and the time Δt required for the water level in the water seepage meter to drop from the initial liquid level h1 to the measured liquid level h2, and transmits the detection data to the display control device; The display control device processes the received data according to the linear fitting correction curve, and then calculates and displays the pavement water seepage coefficient in combination with formula (1): C w = M×(h2- h1) / Δt (1); C w : Pavement water permeability coefficient (mL / min); M: coefficient of the linear fitting equation after calibration; h1: initial liquid level in the test tube before calibration (cm); h2: measured liquid level in the test tube before calibration (cm); Δt: The time (min) required for the water level in the detection tube to drop from the initial liquid level to the measured liquid level.

[0027] As a preferred embodiment of the present application, the data acquisition unit detects the steps of h1, h2, and Δt, including: The data acquisition unit measures the initial liquid level h1 in the detection cylinder before calibration, and sends the detection data to the display control unit; The display control unit determines whether the liquid level drops by more than 20cm within 3 minutes based on the received liquid level data. If the liquid level drops by 20cm, h2=h1+20cm, and Δt is the time it takes for the liquid level to drop from h1 to h2. If the liquid level drops by less than 20cm, h2 is the measured liquid level in the detection cylinder before calibration, and Δt is 3 minutes.

[0028] As a preferred embodiment of the present application, the linear fitting calibration curve is obtained by the following steps: Select a flat area as the testing point to install the automatic road surface water seepage performance testing device; Fill water into the detection tube and exhaust air until the water-containing cavity at the base of the water seepage meter is filled with water to ensure that the liquid level in the water seepage meter tube is stable; The detection equipment is started, and the liquid level sensor automatically measures the liquid level height h (in cm) in the detection cylinder for multiple times. At the same time, the liquid level reading V (in mL) is manually read. The calibration is performed by a linear fit of h and V to obtain a linear fit correction curve.

[0029] As a preferred embodiment of the present application, a maximum of 10 sets of data are read when fitting the linear fitting correction curve, and the R2 Not less than 0.98. After fitting, at room temperature (about 25°C), the linear fitting correction curve is: V=19.965h-414.96, R 2 =0.9999. As a preferred embodiment of the present application, the inner diameter of the detection tube is 50.5 mm, and the coefficient of the linear fitting equation after M calibration means the liquid volume corresponding to the liquid level of 1 cm in the detection tube, and the liquid volume is about 20 mL, that is, the M value should be within the range of 20±0.2. If it exceeds the range, the instrument should be recalibrated.

[0030] The present invention also provides a detection method using another automatic detection device for road surface water seepage performance, characterized in that it comprises the following steps: Select at least one flat area without obvious cracks on the road surface to be tested as the test point, and clean up the dust and debris at the test point; An automatic road permeability detection device is installed at the detection point, and a sealing material is filled between the edge of the base of the water seepage meter and the road surface at the detection point to ensure that the base of the water seepage meter and the road surface at the detection point are completely sealed; Fill the detection cylinder with water and exhaust air until the water-containing cavity of the base of the water seepage meter is filled with water, the detection device is started, and the data acquisition unit detects the ambient temperature T, the initial liquid level h1 in the detection cylinder before correction, the measured liquid level h2 in the detection cylinder before correction, and the time Δt required for the water level in the water seepage meter to drop from the initial liquid level h1 to the measured liquid level h2, and transmits the detection data to the display control device; The calibration unit determines whether the display control device has received the calibration instruction. When it is determined that the display control device has received the calibration instruction, the calibration unit calibrates the initial liquid level h1 in the detection cylinder and the measured liquid level h2 in the detection cylinder, and transmits the obtained initial liquid level h1' in the detection cylinder after calibration and the measured liquid level h2' in the detection cylinder before calibration to the display control device. The display control device processes the received data according to the linear fitting correction curve, and then calculates and displays the pavement water seepage coefficient in combination with formula (2): C w = M×(h2 ’ - h1 ’ ) / Δt (2); C w : Pavement water permeability coefficient (mL / min); M: The coefficient of the linear fitting equation after calibration. The value should be within the range of 20±0.2. If it exceeds the range, the instrument should be recalibrated. h1: initial liquid level in the test tube before calibration (cm); h2: measured liquid level in the test tube before calibration (cm); h1 ’ : Initial liquid level in the detection cylinder after calibration (cm); h2 ’ : The measured liquid level in the detection cylinder after calibration (cm); Δt: The time (min) required for the water level in the detection tube to drop from the initial liquid level to the measured liquid level.

[0031] As a preferred embodiment of the present application, the initial liquid level h1 in the detection cylinder before correction and the measured liquid level h2 in the detection cylinder are corrected to obtain the initial liquid level h1' in the detection cylinder after correction and the measured liquid level h2' in the detection cylinder before correction, which includes: Under different known water levels, the liquid level in the detection cylinder is measured by using a liquid level sensor, and a water level correction curve is established to show the relationship between the liquid level before correction and the liquid level after correction. Determine the initial liquid level h1 in the detection cylinder before calibration and the measured liquid level h2 in the detection cylinder; The initial liquid level height h1 ′ in the detection cylinder after correction and the measured liquid level height h2 ′ in the detection cylinder before correction are calculated based on the water level correction curve.

[0032] In order to further improve the detection accuracy of the equipment, the present application can establish a plurality of water level calibration curves under different ambient temperatures, and select the water level calibration curve at the temperature according to different temperatures.

[0033] Compared with the prior art, the present invention has the following beneficial effects: 1. The structure of the traditional water seepage meter is not changed, and the standard test is not affected, nor is the observation and review of the test personnel affected; 2. Through the high-precision radar liquid level sensor, the liquid level height of the water seepage meter is automatically detected, and the road water seepage coefficient is automatically calculated. The automatic height measurement and the manual liquid level reading are calibrated by linear fitting. The test results are accurate, with high precision, good repeatability, concentrated measured values, small data fluctuations and high stability. The data tested by the radar liquid level sensor can also be corrected twice to further improve the accuracy of the test results, so that the accuracy can reach ±0.5mm; 3. Added a liquid level auxiliary correction mechanism to assist in correcting the liquid level data in the test tube, further improving the accuracy of the test results; 4. Convert the water seepage coefficient into digital information for unified management, which is convenient for automatic generation of original test records and for further access and analysis by management personnel; 5. The foldable support frame can be matched with a small storage box for easy carrying; 6. The fully automated inspection record reduces the drawbacks of insufficient manual inspection frequency, insufficient inspection time, long recording time, incorrect filling and missing filling, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The present invention is a flow chart of the detection of the automatic detection device for road surface water seepage performance.

[0035] Figure 2 The present invention is a structural diagram of an automatic detection device for road surface water seepage performance.

[0036] Figure 3 It is a structural diagram of the water seepage meter of the present invention.

[0037] Figure 4 It is a schematic plan view of the support frame of the present invention.

[0038] Figure 5 Schematic diagram of the positions of sensors and solar panels in the data acquisition unit of the present invention.

[0039] Figure 6 It is a schematic diagram of the structure of the operating unit of the present invention.

[0040] Figure 7 This is a principle tree diagram of an automatic detection device for road surface water seepage performance of the present invention.

[0041] Figure 8 It is a schematic diagram of the process of the automatic detection device for road surface water seepage performance of the present invention.

[0042] In the attached figure: 1. Water seepage meter; 11. Mounting seat; 111. Water storage chamber; 112- Exhaust hole; 12. Detection tube; 121. Water outlet channel; 122. Control valve; 13- Fixing frame; 131- Column bracket; 132- Top plate; 14- Weighted steel ring; 15- Sealing material; 2. Detection equipment; 21. Support frame; 22. Data acquisition unit; 23. Control unit; 211. Base; 212. Telescopic bracket; 221. Mounting substrate; 222. Liquid level sensor; 223. Temperature sensor; 224. GNSS positioning module; 225. Distance measurement sensor; 231. Table; 232. Display control equipment; 233. Wireless communication equipment; 2331. Bluetooth module; 2332. Network module; 241. Solar panel; 242. Battery. DETAILED DESCRIPTION

[0043] The following describes the implementation of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application.

[0044] It should be noted that the process equipment or devices not specifically specified in the following embodiments are all conventional equipment or devices in the art.

[0045] In addition, it should be understood that one or more method steps mentioned in this application do not exclude the existence of other method steps before or after the combination step or the insertion of other method steps between these explicitly mentioned steps, unless otherwise specified; it should also be understood that the combination connection relationship between one or more devices / apparatuses mentioned in this application does not exclude the existence of other devices / apparatuses before or after the combination device / apparatus or the insertion of other devices / apparatuses between these two explicitly mentioned devices / apparatuses, unless otherwise specified. Moreover, unless otherwise specified, the numbering of each method step is only a convenient tool for identifying each method step, and is not intended to limit the order of arrangement of each method step or the scope of implementation of this application. Changes or adjustments in their relative relationships shall also be regarded as the scope of implementation of this application without substantial changes in the technical content.

[0046] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0047] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", "axial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0050] The present application is further described below in conjunction with specific embodiments, but the protection scope of the present application is not limited thereto.

[0051] See also Figure 2~Figure 6 The present invention provides an automatic detection device for road surface water seepage performance, comprising: Water seepage meter 1; The detection device 2 includes a support frame 21 and a data acquisition unit 22 and a control unit 23 disposed on the support frame 21. The data acquisition unit 22 includes a liquid level sensor 222 for detecting the liquid level in the detection cylinder 12; the control unit 23 includes a display control device 232 and a wireless communication device 233. The display control device 232 is connected to the data acquisition unit 22 by wireless signals via the wireless communication device 233; and A power supply is provided on the detection device 2 and is electrically connected to the data acquisition unit 22 and the control unit 23 of the detection device 2 , and is used to provide power to each unit of the detection device 2 .

[0052] In some embodiments of the present invention, the water seepage meter 1 includes a mounting base 11 and a detection tube 12 arranged on the mounting base 11, and the surface of the mounting base 11 facing the road surface is provided with a water containing cavity 111; the bottom of the detection tube 12 is provided with a water outlet channel 121 for connecting to the water containing cavity 111.

[0053] In some embodiments of the present invention, the water seepage meter 1 also includes a fixing frame 13 and a weighted steel ring 14, the fixing frame 13 includes a column bracket 131 arranged on the mounting seat 11 and a top plate 132 arranged on the top of the column bracket 131, the top plate 132 is provided with a threaded hole for fixing the detection cylinder, the detection cylinder 12 is vertically penetrated through the threaded hole and is threadedly connected to the top plate 132, and the detection cylinder 12 is connected to the mounting seat 11 through a water outlet channel 121; the weighted steel ring 14 is sleeved on the outside of the fixing frame 13, and presses the top surface of the mounting seat 11 away from the road surface, and is used to apply downward pressure to the mounting seat 11 so that the surface of the base 11 facing the road surface is pressed against the road surface.

[0054] In some embodiments of the present invention, a sealing material 15 is disposed between the surface of the mounting seat 11 facing the road surface and the road surface.

[0055] In some embodiments of the present invention, an exhaust hole 112 is provided on the top surface of the mounting seat 11 away from the road surface, and the exhaust hole 112 is communicated with the water containing cavity 111 of the mounting seat 11 .

[0056] In some embodiments of the present invention, a scale is provided on the wall of the detection cylinder 12 for directly reading the height of the liquid level in the cylinder.

[0057] In some embodiments of the present invention, the data acquisition unit further includes a mounting substrate 221. The mounting substrate is in the shape of a rectangular plate and is detachably mounted on the top of the support frame.

[0058] In some embodiments of the present invention, the liquid level sensor 222 is a non-contact liquid level sensor. The liquid level sensor 222 is suspended directly above the detection cylinder 12 and is used to detect the liquid level height in the detection cylinder 12 .

[0059] In some embodiments of the present invention, the liquid level sensor 222 is a radar liquid level sensor.

[0060] In some embodiments of the present invention, a control valve 122 is disposed on the water outlet channel 121. The control valve 122 may be a manual control valve or a magnetic control valve.

[0061] In some embodiments of the present invention, the data acquisition unit 22 further includes a temperature sensor 223 for measuring the ambient temperature. Since the radar level sensor uses electromagnetic waves for testing, and there is a certain relationship between the propagation speed of electromagnetic waves and temperature, in order to further improve the test accuracy of the automatic detection device for road permeability performance, the measurement results can be further calibrated. The temperature sensor can test the temperature under different environments, and then the radar level sensor detection data can be further corrected.

[0062] In some embodiments of the present invention, the data acquisition unit 22 also includes a GNSS positioning module 224, which is arranged on the mounting substrate 221 and connected to the display control device 232 via a wireless communication device 233, and is used for locating the current detection point. Combined with the horizontal curve coordinates of the engineering project, the real-time pile number and offset can be automatically calculated to facilitate the automatic generation of test detection records, thereby avoiding the disadvantage of too vague pile number recording in traditional construction.

[0063] In some embodiments of the present invention, the data acquisition unit 22 also includes a distance measuring sensor 225, which is arranged on the mounting substrate 221 and is connected to the display control device 232 via a wireless communication device 233, and is used to calibrate the offset based on the automatic detection of the distance between structures on both sides of the road surface such as bridges and tunnels.

[0064] In some embodiments of the present invention, the control unit 23 further includes a platform 231. The platform 231 is in the shape of a rectangular plate and is detachably mounted in the middle of the support frame.

[0065] In some embodiments of the present invention, the control unit 23 also includes a calibration unit, which is configured to determine whether the display control device 232 has received the correction instruction, and is also configured to correct the data collected by the data acquisition unit 22 when it is determined that the display control device 232 has received the correction instruction.

[0066] In some embodiments of the present invention, the wireless communication device 233 includes a Bluetooth module 2331 and a network module 2332. The display control device 232 is connected to the data acquisition unit 22 by wireless signals through the Bluetooth module 2331, and the display control device 232 is connected to the handheld terminal signal through the network module 2332. The network module can use a 2G module, a 3G module, a 4G module or a 5G module. The detection information is automatically transmitted to the display control device through the built-in network module, and the detection record is automatically generated. At the same time, the digital water permeability coefficient is more convenient for management personnel to perform data analysis. At the same time, the detection personnel can connect to the Bluetooth module through the Bluetooth of the mobile phone to obtain the detection information in real time.

[0067] In some embodiments of the present invention, the power source includes a solar panel 241 and a battery 242, wherein the solar panel 241 is disposed on the mounting substrate 221, and the battery 242 is disposed on the platform 231, and the solar panel 241 is electrically connected to the battery 242. Specifically, the battery can be a rechargeable lithium battery. The solar energy is converted into electrical energy by the solar panel, which is used to power various electrical components of the detection device, thereby improving the portability of the device.

[0068] In some embodiments of the present invention, the support frame 21 includes a mounting seat 211 and a telescopic bracket 212, the bottom of the telescopic bracket 212 is connected to the mounting seat 211, the top of the telescopic bracket 212 is connected to the data acquisition unit 22, and the middle of the telescopic bracket is connected to the operating unit 23.

[0069] In some embodiments of the present invention, the telescopic bracket 212 includes at least two connecting tubes that are mutually sleeved, the bottom of the last connecting tube is fixedly connected to the mounting base 211, and the upper part of the first connecting tube is fixedly connected to the data acquisition unit 22; each connecting tube has two upper and lower positioning holes on its wall, and each connecting tube is connected to an adjacent connecting tube through a connecting piece.

[0070] In some embodiments of the present invention, the automatic detection device for road surface water seepage performance further includes a liquid level auxiliary correction mechanism for assisting in correcting the liquid level data in the detection tube. The liquid level auxiliary correction mechanism can be a scale, a laser range finder, or a radar liquid level sensor. Specifically, the liquid level auxiliary correction mechanism is a radar liquid level sensor.

[0071] The present invention also provides a detection method using the automatic detection device for road surface water seepage performance, comprising the following steps: S1 Randomly select three flat areas without obvious cracks on the road surface to be tested as test points, and clean up the dust and debris at the test points; S2 Install the automatic road water seepage performance detection device at the detection point, fill the sealing material between the edge of the water seepage meter installation seat and the road surface at the detection point, and ensure that the water seepage meter installation seat and the road surface at the detection point are completely sealed; S3: Fill the detection tube with water until the water-containing cavity of the mounting seat of the water seepage meter is full of water, the detection device is started, and the data acquisition unit detects the ambient temperature T, the initial liquid level h1 in the detection tube before correction, the measured liquid level h2 in the detection tube before correction, and the time Δt required for the water level in the water seepage meter to drop from the initial liquid level h1 to the measured liquid level h2, and transmits the detection data to the display control device; The S4 display control device processes the received data according to the linear fitting correction curve, and then calculates and displays the pavement water seepage coefficient in combination with formula (1): C w = M×(h2- h1) / Δt (1); C w : Pavement water permeability coefficient (mL / min); M: The coefficient of the linear fitting equation after calibration. The value should be within the range of 20±0.2. If it exceeds the range, the instrument should be recalibrated. h1: initial liquid level in the test tube before calibration (cm); h2: measured liquid level in the test tube before calibration (cm); Δt: The time (min) required for the water level in the detection tube to drop from the initial liquid level to the measured liquid level.

[0072] During the measurement, select a flat area to install the automatic road permeability detection device, fill the detection cylinder with water to ensure that the liquid level in the permeability meter cylinder is stable, start the calibration mode of the detection equipment, automatically measure the height h, manually read the liquid level reading V, read up to 10 sets of data, and calibrate with a linear fit of h and V.

[0073] In some embodiments of the present invention, in step S3, the data acquisition unit detects h1, h2, and Δt, including: The data acquisition unit measures the initial liquid level h1 in the detection cylinder before calibration, and sends the detection data to the display control unit; The display control unit determines whether the liquid level drops by more than 20cm within 3 minutes based on the received liquid level data. If the liquid level drops by 20cm, h2=h1+20cm, and Δt is the time it takes for the liquid level to drop from h1 to h2. If the liquid level drops by less than 20cm, h2 is the measured liquid level in the detection cylinder before calibration, and Δt is 3 minutes.

[0074] In some embodiments of the present invention, the linear fitting calibration curve in step S4 is obtained by the following steps: Select a flat area as the testing point to install the automatic road surface water seepage performance testing device; Fill water into the detection tube and exhaust air until the water-containing cavity at the base of the water seepage meter is filled with water to ensure that the liquid level in the water seepage meter tube is stable; The detection equipment is started, and the liquid level sensor automatically measures the liquid level height h (in cm) in the detection cylinder for multiple times. At the same time, the liquid level reading V (in mL) is manually read. The calibration is performed by a linear fit of h and V to obtain a linear fit correction curve.

[0075] Specifically, taking a certain use of the instrument as an example, numbers 1-10 are the relationship between the distance h measured by the instrument and the manually read liquid level reading V, and a linear fitting graph is drawn. According to the fitting graph, M in formula (1) is corrected to 19.965.

[0076] Table 1 shows the relationship between the liquid level height h and the liquid level reading V Serial number h (cm) V (mL) 1 30.05 184 2 30.35 191 3 32.2 229 4 33.5 253 5 33.7 259 6 34.4 271 7 38.65 358 8 39.05 365 9 40.45 392 10 44.9 481 Therefore, the linear fitting correction curve established is: V = 19.965h-414.96, R 2 is 0.9999.

[0077] After calibration, the F40 asphalt pavement water seepage was measured. In Table 2, No. 1 to 3 are the automatic detection device for pavement water seepage performance of the present application placed at a certain detection point, and multiple tests were performed according to the detection method. No. 4 to 6 are the traditional water seepage meter tested by manual testing, and the data are shown in Table 2: Table 2 Water seepage coefficient calculation table From the above data, it can be seen that when the device of the present application is used to test water permeability, the average value of the water permeability coefficient of the three measuring points is used as the result of the test position, which is accurate to 0.1mL / min. The test results are accurate, with high precision, good repeatability, concentrated measured values, small data fluctuations and high stability. The present invention also provides a detection method using another automatic detection device for road surface water seepage performance, comprising the following steps: Select three flat areas without obvious cracks on the road surface to be tested as test points, and clean up the dust and debris at the test points; The pavement water seepage performance automatic detection device is installed at the detection point, and the sealing material is filled between the edge of the installation seat of the water seepage meter and the road surface at the detection point to ensure that the installation seat of the water seepage meter and the road surface at the detection point are completely sealed; Fill the detection cylinder with water and exhaust air until the water-containing cavity of the mounting seat of the water seepage meter is filled with water, the detection device is started, and the data acquisition unit detects the ambient temperature T, the initial liquid level h1 in the detection cylinder before correction, the measured liquid level h2 in the detection cylinder before correction, and the time Δt required for the water level in the water seepage meter to drop from the initial liquid level h1 to the measured liquid level h2, and transmits the detection data to the display control device; The calibration unit determines whether the display control device has received the calibration instruction. When it is determined that the display control device has received the calibration instruction, the calibration unit calibrates the initial liquid level h1 in the detection cylinder and the measured liquid level h2 in the detection cylinder, and transmits the obtained initial liquid level h1' in the detection cylinder after calibration and the measured liquid level h2' in the detection cylinder before calibration to the display control device. The display control device processes the received data according to the linear fitting correction curve, and then calculates and displays the pavement water seepage coefficient in combination with formula (2): C w = M×(h2 ’ - h1 ’ ) / Δt (2); C w : Pavement water permeability coefficient (mL / min); M: The coefficient of the linear fitting equation after calibration. The value should be within the range of 20±0.2. If it exceeds the range, the instrument should be recalibrated. h1: initial liquid level in the test tube before calibration (cm); h2: measured liquid level in the test tube before calibration (cm); h1 ’ : Initial liquid level in the detection cylinder after calibration (cm); h2 ’ : The measured liquid level in the detection cylinder after calibration (cm); Δt: The time (min) required for the water level in the detection tube to drop from the initial liquid level to the measured liquid level.

[0078] In some embodiments of the present invention, the initial liquid level h1 in the detection cylinder before correction and the measured liquid level h2 in the detection cylinder are corrected to obtain the initial liquid level h1' in the detection cylinder after correction and the measured liquid level h2' in the detection cylinder before correction, which includes: Under different known water levels, the liquid level in the detection cylinder is measured by using a liquid level sensor, and a water level correction curve is established to show the relationship between the liquid level before correction and the liquid level after correction. Determine the initial liquid level h1 in the detection cylinder before calibration and the measured liquid level h2 in the detection cylinder; The initial liquid level height h1 ′ in the detection cylinder after correction and the measured liquid level height h2 ′ in the detection cylinder before correction are calculated based on the water level correction curve.

[0079] Specifically, under the condition of an ambient temperature of 25°C, the water level calibration curves of h1 and h1' are y = 2.5x -98.71, R² =0.9952; the water level calibration curves of h2 and h2' are y = 1.1751x - 13.308, R² =0.9988. After calculation, the permeability coefficient after temperature correction is more accurate, accurate to 0.1mL / min, the test results are more accurate, with higher precision, better repeatability, more concentrated measurement values, smaller data fluctuations and higher stability.

[0080] It can be seen that after one calibration (by establishing a linear fitting calibration curve of volume and liquid level height), the accuracy of the permeability coefficient is improved. After a second calibration (calibration of the liquid level sensor based on ambient temperature) based on the first calibration, the accuracy of the test data is further improved. Finally, when the device of this application is used to test the water permeability performance, the average value of the water permeability coefficient of the three measuring points is used as the result of the test position, which is accurate to 0.1mL / min. The test results are accurate, with high precision, good repeatability, concentrated measurement values, small data fluctuations and high stability. The above examples are for the purpose of illustrating the embodiments disclosed in the present application and should not be construed as limiting the present application. In addition, the various modifications listed herein and the variations of methods and compositions in the invention are obvious to those skilled in the art without departing from the scope and spirit of the present application. Although the present application has been specifically described in conjunction with various specific preferred embodiments of the present application, it should be understood that the present application should not be limited to these specific embodiments. In fact, various modifications obvious to those skilled in the art as described above to obtain inventions should be included within the scope of the present application.

Claims

1. A road surface water seepage performance automatic detection device, characterized in that: include: Water seepage meter (1); A detection device (2), comprising a support frame (21), a data acquisition unit (22) and a control unit (23) arranged on the support frame (21), wherein the data acquisition unit (22) comprises a liquid level sensor (222) for detecting the height of the liquid level in the detection cylinder (12); the control unit (23) comprises a display control device (232) and a wireless communication device (233), wherein the display control device (232) is connected to the data acquisition unit (22) via a wireless signal via the wireless communication device (233); and A power supply is arranged on the detection device (2) and is electrically connected to a data acquisition unit (22) and a control unit (23) of the detection device (2), and is used to provide power to each unit of the detection device (2).

2. The automatic detection device for road surface water seepage performance according to claim 1 is characterized in that: The liquid level sensor (222) is a non-contact liquid level sensor; the liquid level sensor (222) is suspended directly above the detection cylinder (12) and is used to detect the liquid level height in the detection cylinder (12).

3. The automatic detection device for road surface water seepage performance according to claim 2 is characterized in that: The liquid level sensor (222) is a radar liquid level sensor.

4. The automatic detection device for road surface water seepage performance according to claim 1 is characterized in that: The data acquisition unit (22) further comprises a GNSS positioning module (224); the GNSS positioning module (224) is arranged on the mounting substrate (221) and is connected to the display control device (232) via a wireless communication device (233).

5. The automatic detection device for road surface water seepage performance according to claim 1 is characterized in that: The data acquisition unit (22) further comprises a distance measuring sensor (225), wherein the distance measuring sensor (225) is arranged on the mounting substrate (221) and is connected to the display control device (232) via a wireless communication device (233).

6. The automatic detection device for road surface water seepage performance according to claim 1, characterized in that: The wireless communication device (233) comprises a Bluetooth module (2331) and a network module (2332); the display control device (232) is connected to the data acquisition unit (22) by wireless signals via the Bluetooth module (2331); and the display control device (232) is connected to the handheld terminal by signals via the network module (2332).

7. The automatic detection device for road surface water seepage performance according to claim 1 is characterized in that: The power source comprises a solar panel (241) and a storage battery (242); the solar panel (241) is arranged on a mounting substrate (221); the storage battery (242) is arranged on the platform (231); and the solar panel (241) is electrically connected to the storage battery (242).

8. The automatic detection device for road surface water seepage performance according to claim 1 is characterized in that: The support frame (21) comprises a base frame (211) and a telescopic support (212), the bottom of the telescopic support (212) being connected to the base frame (211), the top of the telescopic support (212) being connected to the data acquisition unit (22), and the middle of the telescopic support being connected to the control unit (23).

9. A detection method using the automatic detection device for road surface water permeability according to any one of claims 1 to 8, characterized in that: The following steps are involved: Select at least one flat area without obvious cracks on the road surface to be tested as the test point, and clean up the dust and debris at the test point; Install the automatic road water seepage performance detection device at the detection point, and fill the sealing material between the edge of the base of the water seepage meter and the road surface at the detection point to ensure that the mounting base of the water seepage meter and the road surface at the detection point are completely sealed; Fill the detection cylinder with water and exhaust air until the water-containing cavity of the mounting seat of the water seepage meter is filled with water, the detection device is started, and the data acquisition unit detects the ambient temperature T, the initial liquid level h1 in the detection cylinder before correction, the measured liquid level h2 in the detection cylinder before correction, and the time Δt required for the water level in the water seepage meter to drop from the initial liquid level h1 to the measured liquid level h2, and transmits the detection data to the display control device; The display control device processes the received data according to the linear fitting correction curve, and then calculates and displays the pavement water seepage coefficient in combination with formula (1): C w = M×(h2- h1) / Δt (1); C w : Pavement water permeability coefficient (mL / min); M: The coefficient of the linear fitting equation after calibration. The value should be within the range of 20±0.

2. If it exceeds the range, the instrument should be recalibrated. h1: initial liquid level in the test tube before calibration (cm); h2: measured liquid level in the test tube before calibration (cm); Δt: The time (min) required for the water level in the detection tube to drop from the initial liquid level to the measured liquid level.

10. The detection method according to claim 9, characterized in that: The data acquisition unit detects h1, h2, and Δt steps, including: The data acquisition unit measures the initial liquid level h1 in the detection cylinder before calibration, and sends the detection data to the display control unit; The display control unit determines whether the liquid level drops by more than 20cm within 3 minutes based on the received liquid level data. If the liquid level drops by 20cm, h2=h1+20cm, and Δt is the time it takes for the liquid level to drop from h1 to h2. If the liquid level drops by less than 20cm, h2 is the measured liquid level in the detection cylinder before calibration, and Δt is 3 minutes.

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