A highway pavement thickness detection device

Abstract

The present application relates to the technical field of highway thickness detection, and specifically relates to a highway pavement thickness detection device, which comprises a filter screen monitoring and analyzing module, the filter screen monitoring and analyzing module comprising a data acquisition module, a data calculation chip and a filter screen maintenance module; the data calculation chip analyzes the flow data collected by the data acquisition module, adjusts the working power of the first water absorber through the filter screen maintenance module, acquires the filter screen performance index at the current time according to the similarity between each water flow recovery time period in the set time period and the flow data in the preset reference time period, and performs different maintenance operations on the filter screen according to the filter screen performance index and the numerical change of the flow data in the set time period. The present application effectively reduces the number of times of adding water to the water tank of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of highway thickness detection, and in particular to a highway pavement thickness detection device. BACKGROUND

[0002] The highway pavement thickness is a key indicator to ensure the road use performance and structural durability, and reasonable pavement thickness can ensure the repeated use of the road under traffic load and resist the erosion of the natural environment, so accurate detection of the highway pavement thickness is of great significance to ensure the engineering quality, guide scientific maintenance and prolong the service life of the road.

[0003] Most highways are asphalt pavements, and the drilling method is a commonly used pavement thickness detection method; when the drilling method is used to detect the thickness of the asphalt pavement, the drill core usually needs to be cooled during the operation of the equipment to avoid damage to the drill core due to high temperature. The patent document with the publication number CN216898835U discloses a pavement thickness detection device for highway engineering, which specifically cools the drill core by providing a water tank, but does not monitor the temperature of the drill core during operation, directly sprays the drill core in operation to cool it, which leads to rapid consumption of water in the water tank, and the water in the water tank is not recycled, so when the water in the water tank is used up, it needs to be manually added, which requires a lot of effort to observe the remaining amount of water in the water tank. SUMMARY

[0004] In order to solve the technical problem of rapid consumption of water in the water tank and the need for a lot of effort to observe the remaining amount of water in the water tank, the purpose of the present application is to provide a highway pavement thickness detection device, and the technical solution adopted is as follows:

[0005] A highway pavement thickness detection device, the highway pavement thickness detection device comprises a filter screen monitoring and analyzing module, the filter screen monitoring and analyzing module is installed on the highway pavement thickness detection device body, the filter screen monitoring and analyzing module comprises a data acquisition module, a data calculation chip and a filter screen maintenance module; the filter screen maintenance module comprises a drill core barrel and a dust removal and cooling module, the dust removal and cooling module further comprises a first water absorber, a water return pipe and a filter screen;

[0006] The data acquisition module is connected to the signal input end of the data calculation chip, and the signal output end of the data calculation chip is connected to the filter screen maintenance module; the data acquisition module is used to collect the temperature data of the drill core barrel at the current time and the flow data of the water return pipe at each time within a set time period, and transmit the data to the data calculation chip; the last time within the set time period is the current time;

[0007] The data computing chip is configured to obtain temperature reference data at the current time, and adjust the working power of the first water absorber in the dust removal and cooling module by the filter screen maintenance module according to the relative size between the temperature data at the current time and the temperature reference data.

[0008] The set time period is divided into different water flow recovery time periods, and a filter screen performance index at the current time is obtained according to the similarity between each water flow recovery time period in the set time period and the flow data in the preset reference time period; and different maintenance operations are performed on the filter screen according to the filter screen performance index and the numerical change of the flow data in the set time period.

[0009] Further, the method of adjusting the working power of the first water absorber in the dust removal and cooling module by the filter screen maintenance module according to the relative size between the temperature data at the current time and the temperature reference data comprises:

[0010] The ratio of the temperature data at the current time to the temperature reference data is taken as a temperature deviation index at the current time;

[0011] A first deviation threshold and a second deviation threshold are set, the first deviation threshold is less than a preset reference positive number, and the second deviation threshold is greater than the preset reference positive number;

[0012] When the temperature deviation index is less than or equal to the first deviation threshold, the difference between the working power of the first water absorber at the current time and the working power of the first water absorber at the adjacent previous time and the preset reference power is taken as the working power of the first water absorber at the current time;

[0013] When the temperature deviation index is greater than the first deviation threshold and less than or equal to the second deviation threshold, the working power of the first water absorber at the current time is equal to the working power of the first water absorber at the adjacent previous time;

[0014] When the temperature deviation index is greater than the second deviation threshold, the sum of the working power of the first water absorber at the current time and the working power of the first water absorber at the adjacent previous time and the preset reference power is taken as the working power of the first water absorber at the current time.

[0015] Further, the method of obtaining temperature reference data at the current time comprises:

[0016] The temperature data at the first time in the set time period is set as the temperature reference data at the corresponding time, it is judged whether the working power of the first water absorber at the second time in the set time period and the working power of the first water absorber at the adjacent previous time are equal, if yes, the temperature reference data of the drill core barrel at the second time and the adjacent previous time are equal, if not, the temperature data of the drill core barrel at the second time is taken as the temperature reference data at the second time under the working power of the first water absorber at the second time; and the same is applied to the current time.

[0017] Further, the method for obtaining the filter performance index of the current time comprises:

[0018] For each water flow recovery time period in the set time period, arrange the flow data of all time periods in the water flow recovery time period in time sequence to obtain a flow sequence;

[0019] Obtain a flow distance index between the flow sequence of each water flow recovery time period in the set time period and the preset reference time period; based on the flow data of all time periods in each water flow recovery time period, obtain a flow central value of each water flow recovery time period;

[0020] According to the flow distance index between the flow sequence of each water flow recovery time period in the set time period and the preset reference time period, and the difference between the flow central values, obtain a matching index of each water flow recovery time period in the set time period;

[0021] For the matching indexes of all water flow recovery time periods in the set time period, record the water flow recovery time period corresponding to the matching index less than the preset matching threshold as a flow abnormal time period; in the set time period, take the ratio of the number of flow abnormal time periods to the number of water flow recovery time periods as the filter performance index of the current time.

[0022] Further, the method for performing different maintenance operations on the filter according to the filter performance index and the numerical change of the flow data in the set time period comprises:

[0023] If the filter performance index of the current time is greater than a preset performance threshold, perform a replacement operation on the filter; if the filter performance index of the current time is less than or equal to the preset performance threshold, determine whether to perform a cleaning operation on the filter according to the difference between the flow data of the current time and all flow data in the set time period.

[0024] Further, the method for determining whether to perform a cleaning operation on the filter according to the difference between the flow data of the current time and all flow data in the set time period comprises:

[0025] Take the average of the flow central values of all water flow recovery time periods in the set time period as a flow judgment value; determine whether the flow data of the current time is less than the flow judgment value, if yes, the filter needs to be cleaned at the current time, if not, the filter does not need to be cleaned at the current time.

[0026] Further, the method for obtaining the matching index of each water flow recovery time period in the set time period comprises:

[0027] For each water flow recovery time period in the set time period, the absolute value of the difference between the water flow recovery time period and the flow central value of the preset reference time period is taken as the flow difference index between the water flow recovery time period and the preset reference time period; the flow difference index and the flow distance index are respectively subjected to negative correlation mapping, and the product of the negative correlation mapping result of the flow difference index and the negative correlation mapping result of the flow distance index is subjected to normalization processing to obtain a matching index of the water flow recovery time period.

[0028] Further, the flow distance index is the DTW distance between each water flow recovery time period in the set time period and the flow sequence of the preset reference time period.

[0029] Further, the preset reference time period is the first water flow recovery time period in the set time period.

[0030] Further, the flow central value is the mean value of the flow data at all time points in each water flow recovery time period.

[0031] The present application has the following beneficial effects:

[0032] The present scheme is installed with a water recovery part in the highway pavement thickness detection device, which can recover the water for cooling the drill core cylinder, effectively reducing the number of times of adding water to the water storage tank of the device by human, and reducing the energy of the test personnel to focus on the water storage tank of the device.

[0033] Compared with the existing highway pavement thickness detection device, the present scheme analyzes the relative size between the temperature data of the drill core cylinder at the current time and the temperature reference data, and adaptively adjusts the working power of the first water suction device, thereby adjusting the water consumption for cooling the drill core cylinder, and saving the water consumption of the device in the working process while ensuring the cooling effect of the drill core cylinder.

[0034] On the basis of the device installed with the water recovery part, the present scheme collects the flow data of the water recovery pipe in the set time period through the data acquisition module, analyzes the similarity between the flow data in each water flow recovery time period in the set time period and the flow data in the preset reference time period, obtains the filter performance index at the current time, reflects the influence of the particles in the recovered water on the filter performance by analyzing the similarity between the flow data in the water flow recovery time period and the flow data under the normal working condition of the filter, can more accurately reflect the current filter state, and can adaptively perform different maintenance operations on the filter according to the real-time data changes, so as to ensure that the particles such as silt in the recovered water do not affect the normal operation of the device. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art and the advantages thereof, simple descriptions will be given to the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0036] Figure 1 The first axonometric view of the highway pavement thickness detection device provided by one embodiment of the present application;

[0037] Figure 2 The second axonometric view of the highway pavement thickness detection device provided by one embodiment of the present application;

[0038] Figure 3 The structural view of the dust removal and cooling module provided by one embodiment of the present application;

[0039] Figure 4 The structural view of the core drilling barrel provided by one embodiment of the present application;

[0040] Figure 5 The method flowchart executed by the filter screen monitoring and analyzing module provided by one embodiment of the present application;

[0041] In the figure: 1, mobile wheel; 2, mounting frame; 3, dust removal and cooling module; 4, electric telescopic device; 5, connecting frame; 6, rotating frame; 7, core drilling barrel; 8, drill hole; 301, water storage tank; 302, first water suction device; 303, water spraying pipe; 304, water spraying head; 305, water return pipe; 306, filter screen; 307, water suction ring; 308, flow sensor; 309, second water suction device; 701, connecting cover; 702, fixing bolt; 703, connecting threaded hole; 704, barrel body; 705, detection window; 706, infrared temperature measuring head. DETAILED DESCRIPTION

[0042] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined purposes, the specific embodiments, structures, features and effects of the highway pavement thickness detection device according to the present application are described in detail as follows in combination with the drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0044] The highway pavement thickness detection device body is provided with a filter screen monitoring and analyzing module, which is used for detecting and analyzing the performance of the filter screen in the highway pavement thickness detection device, so that the filter screen monitoring and analyzing module comprises a data acquisition module, a data calculation chip and a filter screen maintenance module. The data acquisition module is connected to the data calculation chip, the data calculation chip is used for data processing, the chip type is FPGA, it receives the information of the data acquisition module, and sends a control instruction.

[0045] The specific scheme of the highway pavement thickness detection device provided by the present application will be described in detail below with reference to the accompanying drawings.

[0046] Please refer to Figure 1 and Figure 2 It shows a highway pavement thickness detection device provided by an embodiment of the present application, which comprises a moving wheel 1, a mounting frame 2, a dust removal and cooling module 3, an electric telescopic device 4, a connecting frame 5, a rotating frame 6, a drill core barrel 7 and a drill hole 8. The electric telescopic device 4 is located at the top end of the mounting frame 2, and the rotating frame 6 is connected to the bottom end of the electric telescopic device 4 through the connecting frame 5. The drill core barrel 7 is installed at the bottom end of the rotating frame 6. During detection, the drill core barrel 7 is rotated by the rotating frame 6, and the drill core barrel 7 is moved downward through the drill hole 8 by the electric telescopic device 4, so as to drill and sample the highway pavement.

[0047] A dust removal and cooling module 3 is installed on the left side of the mounting frame 2, please refer to Figure 3 It shows a structure diagram of a dust removal and cooling module provided by an embodiment of the present application. The dust removal and cooling module 3 is composed of a water storage tank 301, a first water suction device 302, a water spraying pipe 303, a water spraying head 304, a water return pipe 305, a filter screen 306, a water suction ring 307, a flow sensor 308 and a second water suction device 309. When the device works, the first water suction device 302 sucks the water stored in the water storage tank 301, and the water is transported to the water spraying head 304 through the water spraying pipe 303, and is sprayed to the drill core barrel 7 through the water spraying head 304, so as to realize the cooling treatment of the drill core barrel 7, and avoid the damage of the drill core barrel 7 due to overheating.

[0048] The water suction pipe 305 is connected with the water suction ring 307, and the second water suction device 309 is installed on the water suction pipe 305. The water suction device formed by the three parts can be moved, and before the coring barrel 7 samples the road surface, the water suction device is placed on the road surface to be sampled. The water spraying head 304 is located below the mounting frame 2 and near the drilling hole 8. When the coring barrel 7 samples the road surface through the drilling hole 8, the surface of the coring barrel 7 is sprayed by the water spraying head 304, and the water flows to the road surface, so that a large amount of water is generated near the drilling hole generated by the coring barrel working on the road surface. Since the water suction ring 307 is located around the drilling hole in the water suction device, the water suction ring 307 is used to suck the water near the drilling hole, and the water collected by the water suction ring 307 is transmitted to the water storage tank 301 through the second water suction device 309 on the water suction pipe 305. In the process of the water flowing from the water suction pipe 305 to the water storage tank 301, the impurities in the recycled water are filtered through the filter screen 306; at the same time, the water flow of the water suction pipe 305 is monitored by the flow sensor 308, which is used to analyze the performance state of the filter screen 306, so as to ensure that it is in a normal state.

[0049] It should be noted that if it is necessary to replace the position to sample the road surface, the water suction device formed by the water suction pipe 305, the water suction ring 307 and the second water suction device 309 is fixed below the mounting frame 2 before the highway road surface thickness detection device moves the position, and the water suction device is placed on the road surface before the coring barrel 7 works next time. When the coring barrel 7 samples the road surface, the road surface inside the water suction ring 307 placed from the road surface needs to be sampled. The size of the water suction ring 307 is equal to that of the drilling hole 8, so that the coring barrel 7 can pass through the inside of the water suction ring 307 and effectively recover the water sprayed near the drilling hole.

[0050] Please refer to Figure 4 , which shows a structure diagram of a coring barrel provided by an embodiment of the present application. The coring barrel 7 is composed of a connecting cover 701, a fixing bolt 702, a connecting threaded hole 703, a barrel body 704, a detection window 705 and an infrared temperature measuring head 706. The infrared temperature measuring head 706 can monitor the surface temperature of the coring barrel 7 in real time during the drilling sampling process, and the coring barrel 7 is cooled by the dust removal and cooling module 3. After sampling, the sample core is directly observed through the detection window 705, which is convenient for detecting the thickness of the road surface.

[0051] The data acquisition module is connected to the signal input end of the data calculation chip, the signal output end of the data calculation chip is connected to the filter screen maintenance module and a signal receiving device such as a display screen or a buzzer, and a display screen is selected in the embodiment; the filter screen maintenance module is used to adjust the working power of the first water pump, and the signal receiving device is used to receive the control instructions sent by the data calculation chip, so that different maintenance operations are performed on the filter screen; the data acquisition module is used to collect the temperature data of the core barrel at the current time and the flow data of the backwater pipe at each time within a set time period in real time, and transmit the data to the data calculation chip; the last time within the set time period is the current time.

[0052] In the embodiment of the application, the data acquisition module is composed of the infrared temperature measuring head 706 in the core barrel 7 and the flow sensor 308 in the dust removal and cooling module 3, and the filter screen maintenance module is composed of the core barrel 7 and the dust removal and cooling module 3. Among them, the infrared temperature measuring head 706 in the data acquisition module is used to collect the temperature data of the core barrel 7 in real time, and the flow sensor 308 is used to collect the flow data of the backwater pipe 305 in the dust removal and cooling module 3 at each time within a set time period.

[0053] It should be noted that the infrared temperature measuring head is an infrared temperature measuring sensor; the flow sensor is a water flow sensor, which is used to measure the water inflow of the backwater pipe; the collection frequency of the temperature data and the flow data is the same, and there is temperature data and flow data corresponding to each time, and the collection frequency is once per second, which can be set by the implementer according to the specific situation.

[0054] The operation process of the highway pavement thickness detection device is as follows:

[0055] The core barrel of the device starts to work, when the surface temperature of the core barrel is greater than the preset temperature threshold, the first water pump starts to work, the first water pump initially works according to the preset power, realizes the cooling treatment of the core barrel, and then adjusts the working power of the first water pump by analyzing the temperature data change of the core barrel, and controls the water inflow of the water jet pipe through the working power of the first water pump to optimize the water consumption of the water storage tank in the working process of the device.

[0056] When the first water pump runs for a preset time, the water absorption ring and the second water pump start to run at a fixed power, the water sprayed on the road surface is collected in the water absorption ring, and the water collected in the water absorption ring is transmitted to the water storage tank through the backwater pipe through the second water pump, and the filter screen is used to filter the particles such as silt in the water recovered by the water absorption ring.

[0057] It should be noted that the preset temperature threshold is 50 degrees Celsius; the working power of the first water absorber ranges from 500 watts to 2000 watts, and the first water absorber initially works at the minimum working power of 500 watts, i.e., the preset power is 500 watts, and the working power of the water absorption ring and the second water absorber is 100 watts; the preset time length is 1 minute, and the implementer can set it according to the specific circumstances.

[0058] Please refer to Figure 5 which shows a method flowchart executed by a filter screen monitoring and analyzing module according to an embodiment of the present application, and the method comprises the following steps:

[0059] Step S100: Obtain temperature reference data at the current time, and adjust the working power of the first water absorber in the dust removal and cooling module through the filter screen maintenance module according to the relative size between the temperature data at the current time and the temperature reference data.

[0060] The temperature reference data at the current time represents the normal temperature data of the drill core barrel after cooling treatment before the working power of the first water absorber at the current time is changed. In the embodiment of the present application, the method for obtaining the temperature reference data is as follows: set the temperature data at the first time in a set time period as the temperature reference data at the corresponding time, judge whether the working power of the first water absorber at the second time in the set time period is equal to that at the adjacent previous time, if yes, the temperature reference data of the drill core barrel at the second time is equal to that at the adjacent previous time; if not, set the temperature data of the drill core barrel at the second time under the working power of the first water absorber at the second time as the temperature reference data at the second time; and so on until the current time.

[0061] As an example, if there are four times in the set time period, in turn, t1 time, t2 time, t3 time and t4 time, t1 time is the starting time of the first water absorber in the highway pavement thickness detection device, set the temperature data at t1 time as the temperature reference data; if the working power of the first water absorber at t1 time and t2 time is unchanged, the temperature reference data at t2 time is equal to that at t1 time; if the working power of the first water absorber at t3 time is changed, set the temperature data of the drill core barrel at t3 time as the temperature reference data at t3 time under the new working power of the first water absorber at t3 time; if the working power of the first water absorber at t3 time and t4 time is unchanged, set the temperature reference data at t3 time as the temperature reference data at t4 time.

[0062] The greater or smaller the temperature data at the current time is relative to the temperature reference data, the more the working power of the first water absorber is insufficient to ensure the normal temperature change of the drill core barrel during the working process, and the water flow of the water spraying head needs to be adjusted by adjusting the working power of the first water absorber to restore the temperature of the drill core barrel to normal, so that the working power of the first water absorber in the dust removal and cooling module is adjusted according to the relative size between the temperature data at the current time and the temperature reference data.

[0063] Preferably, in some possible implementation manners of the embodiment of the present application, the method for adjusting the working power of the first water absorber is that: the ratio of the temperature data at the current time to the temperature reference data is taken as a temperature deviation index at the current time; the first deviation threshold and the second deviation threshold are set, the first deviation threshold is less than the preset reference positive number, and the second deviation threshold is greater than the preset reference positive number; when the temperature deviation index is less than or equal to the first deviation threshold, the difference between the working power of the first water absorber at the current time and the working power of the first water absorber at the adjacent previous time of the current time and the preset reference power is taken as the working power of the first water absorber at the current time; when the temperature deviation index is greater than the first deviation threshold and less than or equal to the second deviation threshold, the working power of the first water absorber at the current time is equal to the working power of the first water absorber at the adjacent previous time of the current time; and when the temperature deviation index is greater than the second deviation threshold, the sum of the working power of the first water absorber at the current time and the working power of the first water absorber at the adjacent previous time of the current time and the preset reference power is taken as the working power of the first water absorber at the current time.

[0064] the temperature deviation index at the current time , wherein the temperature data at the current time is the temperature reference data at the current time. When the temperature deviation index is less than 1 and closer to 1, the temperature data of the drill core barrel at the current time is lower than the temperature reference data, but the possibility of the temperature data at the current time being in normal temperature change is greater; and when the temperature deviation index is greater than 1 and closer to 1, the temperature data of the drill core barrel at the current time is higher than the temperature reference data, but the possibility of the temperature data at the current time being in normal temperature change is greater. Therefore, the first deviation threshold is less than the preset reference positive number, which is used to analyze the temperature fluctuation under the condition that the temperature data at the current time is lower than the temperature reference data; and the second deviation threshold is greater than the preset reference positive number, which is used to analyze the temperature fluctuation under the condition that the temperature data at the current time is higher than the temperature reference data.

[0065] It should be noted that the preset reference positive number in the embodiment of the present application is taken as an empirical value 1, the first deviation threshold A is taken as an empirical value , and the second deviation threshold B is taken as an empirical value 2, which can be set by the implementer according to the specific situation.

[0066] When the temperature deviation index is less than the first deviation threshold, That is , indicating that the temperature change of the drill core barrel exceeds the normal range, at this time the water output of the water spray pipe in the dust removal and cooling module is sufficient to reduce the temperature of the drill core barrel to the target value, in order to reduce the water consumption of the water storage tank, the working power of the first water suction device at the current time needs to be reduced, and the working power of the first water suction device at the current time is adjusted to the difference value between the working power of the first water suction device at the adjacent previous time of the current time and the preset reference power.

[0067] When the temperature deviation index is greater than or equal to the first deviation threshold and less than or equal to the second deviation threshold, That is , indicating that the temperature change of the drill core barrel at the current time is within the normal range, and the working power of the first water suction device at the adjacent previous time of the current time can ensure that the drill core barrel is at a normal temperature change, so the working power of the first water suction device at the current time and the adjacent previous time thereof remains unchanged, and the working power of the first water suction device at the current time is adjusted to the working power of the first water suction device at the adjacent previous time of the current time.

[0068] When the temperature deviation index is greater than the second deviation threshold, That is , indicating that the temperature change of the drill core barrel exceeds the normal range, at this time the water output of the water spray pipe in the dust removal and cooling module is insufficient to reduce the temperature of the drill core barrel, in order to restore the temperature of the drill core barrel to normal, the working power of the first water suction device at the current time needs to be increased, and the working power of the first water suction device at the current time is adjusted to the sum of the working power of the first water suction device at the adjacent previous time of the previous time and the preset reference power.

[0069] It should be noted that the first water suction device operates at the working power of the current time within the time period between the current time and the adjacent next time thereof. If the working power of the first water suction device at the adjacent previous time of the current time is the minimum value or the maximum value of the working power range of the first water suction device, the working power of the first water suction device cannot be continuously reduced or increased, and the working power of the first water suction device at the current time is set to the working power of the first water suction device at the adjacent previous time of the current time. In the embodiment of the application, the preset reference power is 100 watts, which can be set by the implementer according to the specific situation.

[0070] According to the above method, the working power of the first water suction device in the dust removal and cooling module is adjusted in real time, and the water consumption in the working process of the device is optimized by controlling the water output of the water spray pipe.

[0071] Step S200: dividing the set time period into different water flow recovery time periods, obtaining the filter screen performance index of the current time according to the similarity between the flow data in each water flow recovery time period in the set time period and the preset reference time period, and performing different maintenance operations on the filter screen according to the filter screen performance index and the numerical change of the flow data in the set time period.

[0072] With the increase of the use time of the filter screen, the filter screen will be gradually blocked by particulate matter, resulting in a decrease in the filtering performance, and the filter screen will be impacted by water flow for a long time, so that the rigidity of the filter screen, that is, the ability to resist the impact of water flow, is affected. Therefore, the flow data of the recovered water is monitored by the flow sensor installed in the water storage tank, and whether the filter screen needs to be cleaned or replaced is determined according to the real-time monitored water flow.

[0073] The set time period is a time period between the starting time of the first water absorber in the highway pavement thickness detection device and the current time. In order to analyze the performance state of the filter screen at different times, the set time period is randomly divided into different water flow recovery time periods in the embodiment of the application, and the length of the water flow recovery time period is at least 10 minutes. It should be noted that a new filter screen needs to be installed in advance every time the highway pavement thickness detection device starts to work.

[0074] When the highway pavement thickness detection device starts to work, the filter screen is relatively new and the performance is not affected. In order to analyze the performance information of the filter screen after the device works for a long time, the first water flow recovery time period in the set time period is taken as a preset reference time period in the embodiment of the application, and the flow data in the preset reference time period represents the normal performance information of the filter screen.

[0075] The flow data in each water flow recovery time period reflects the performance state of the filter screen in the water flow recovery time period. The flow data in each water flow recovery time period in the set time period is compared with the flow data in the preset reference time period. If the similarity between the flow data in a certain water flow recovery time period and the flow data in the preset reference time period is smaller, it indicates that the possibility of abnormal performance of the filter screen in the water flow recovery time period is greater, so as to obtain the filter screen performance index of the current time.

[0076] Preferably, in some possible implementation manners of the embodiment of the present application, the matching index is obtained by: arranging the flow data at all time points in each water flow recovery time period in a time sequence to obtain a flow sequence; obtaining a flow distance index between the flow sequence of each water flow recovery time period and the flow sequence of the preset reference time period; obtaining a flow central value of each water flow recovery time period based on the flow data at all time points in each water flow recovery time period; and obtaining the matching index of each water flow recovery time period in the set time period based on the difference between the flow distance index between the flow sequence of each water flow recovery time period and the flow sequence of the preset reference time period and the flow central value.

[0077] Since the lengths of the water flow recovery time periods in the set time period are different, the number of elements in different flow sequences is different, and therefore, in the embodiment of the present application, the DTW distance between the flow sequence of the water flow recovery time period and the flow sequence of the preset reference time period is obtained by using the dynamic time warping algorithm, and is taken as the flow distance index. If the flow distance index is smaller, it indicates that the flow data in the water flow recovery time period is more matched with the flow data under the normal state of the filter screen, and the possibility that the filter screen in the water flow recovery time period is normal is greater. The dynamic time warping algorithm is a known technology to those skilled in the art, and is not described here in detail.

[0078] The flow central value reflects the concentration trend of the flow data in the water flow recovery time period. If the difference between the flow central values of the water flow recovery time period and the preset reference time period is smaller, it indicates that the flow data in the water flow recovery time period is closer to the flow data under the normal state of the filter screen, and the flow data in the water flow recovery time period is more matched with the flow data under the normal state of the filter screen, and the possibility that the filter screen in the water flow recovery time period is normal is greater. In the embodiment, the mean value of the flow data at all time points in each water flow recovery time period is taken as the flow central value.

[0079] The flow distance index considers the alignment and shape matching degree of the flow data in the water flow recovery time period and the preset reference time period in time, and the difference between the flow central values pays more attention to the matching degree of specific values and overall angles. Comprehensive consideration of the above two indexes can accurately analyze the matching degree of the flow data in the water flow recovery time period and the preset reference time period, and improve the accuracy of the matching index. If the difference between the flow central values of the water flow recovery time period and the preset reference time period is smaller and the flow distance index is smaller, the matching degree between the flow data of the water flow recovery time period and the preset reference time period is greater, and the possibility that the filter screen in the water flow recovery time period is normal is greater. Therefore, the flow distance index between the flow sequence of the water flow recovery time period and the preset reference time period, and the difference between the flow central values are negatively correlated with the matching index.

[0080] In the embodiment of the present application, the matching index is obtained by: for each water flow recovery time period in the set time period, taking the absolute value of the difference between the flow concentration value of the water flow recovery time period and the flow concentration value of the preset reference time period as the flow difference index between the water flow recovery time period and the preset reference time period; performing negative correlation mapping on the flow difference index and the flow distance index respectively, and performing normalization processing on the product of the negative correlation mapping result of the flow difference index and the negative correlation mapping result of the flow distance index to obtain the matching index of the water flow recovery time period.

[0081] In one specific implementation manner of the embodiment of the present application, the matching index is expressed by a formula as follows:

[0082]

[0083] In the formula, m is an integer greater than or equal to 1 and less than or equal to the number of water flow recovery time periods in the set time period; and is the matching index of the mth water flow recovery time period in the set time period; is the flow distance index between the mth water flow recovery time period in the set time period and the flow sequence of the preset reference time period; is the flow concentration value of the mth water flow recovery time period in the set time period; is the flow concentration value of the preset reference time period; is the flow difference index between the mth water flow recovery time period in the set time period and the preset reference time period; is a preset positive number, which is an experience value of 0.01 and is used to prevent the denominator from being zero to cause the fraction to be meaningless; is an absolute value function; and Norm is a normalization function. It should be noted that the negative correlation mapping is realized by taking the reciprocal in the embodiment of the present application, and the negative correlation mapping can be realized by an exponential function with a natural constant as the base in other embodiments.

[0084] The smaller the matching index of the water flow recovery time period is, the greater the possibility that the flow fluctuation of the filter screen in the water flow recovery time period is abnormal, and the greater the possibility that the filter screen in the water flow recovery time period has a performance problem. For the matching indexes of all water flow recovery time periods in the set time period, the water flow recovery time period corresponding to the matching index less than a preset matching threshold is recorded as a flow abnormal time period, and the filter screen in the flow abnormal time period has a performance problem; in the set time period, the ratio of the number of flow abnormal time periods to the number of water flow recovery time periods is taken as the filter screen performance index at the current time.

[0085] It should be noted that the preset matching threshold is an experience value of 0.4 in the embodiment, and the implementer can set it according to the specific situation.

[0086] Based on this, whether the filter is replaced is determined based on the filter performance index at the current time, and if so, a first control instruction is generated and sent to a display screen connected to the data calculation chip. The specific determination process is: if the filter performance index at the current time is greater than the preset performance threshold, the display screen displays the first control instruction, and the worker replaces the filter when seeing the first control instruction on the display screen; if the filter performance index at the current time is less than or equal to the preset performance threshold, it indicates that the filter has no performance problem, and the filter is not replaced, but the filter may be blocked by particulate matter.

[0087] In the embodiment of the application, the preset performance threshold is 0.5, which can be set by the implementer according to the specific situation. At the same time, the first control instruction is a start instruction for replacing the filter. That is, the flow data during the operation of the device is detected and analyzed in a timely manner, and if the filter performance index at the current time is greater than 0.5, it indicates that the filter needs to be replaced at this time, and the first control instruction is generated and fed back to the display screen, and the worker replaces the filter. If the filter performance index at the current time is less than or equal to 0.5, it indicates that the filter does not need to be replaced at this time, and the water sprayed by the water spraying head can continue to be recycled to the water storage tank through the water suction device.

[0088] If the filter is not replaced, it is necessary to further analyze whether the filter is blocked by particulate matter at the current time. The specific method is: based on the difference between the flow data at the current time and the flow data in all water flow recycling time periods in the set time period, it is determined whether the filter is cleaned at the current time, and if so, a second control instruction is generated and sent to the display screen connected to the data calculation chip. The specific determination process is: the mean of the flow central values of all water flow recycling time periods in the set time period is taken as a flow judgment value; it is determined whether the flow data at the current time is less than the flow judgment value; it is known that when there is particulate matter in the water flow, the greater the water flow, the less likely the filter is blocked; if the flow data at the current time is less than the flow judgment value, the filter is cleaned; if the flow data at the current time is greater than or equal to the flow judgment value, it indicates that the filter is not blocked at the current time, and the filter is not cleaned.

[0089] At the same time, the second control instruction is a start instruction for cleaning the filter. That is, the flow data during the operation of the device is detected and analyzed in a timely manner, and if the flow data at the current time is less than the flow judgment value, it indicates that the filter is blocked, and the data calculation chip needs to generate the second control instruction and send it to the display screen connected to the data calculation chip, and the worker cleans the filter when seeing the second control instruction on the display screen. If the flow data at the current time is greater than or equal to the flow judgment value, it indicates that the filter does not need to be cleaned at this time, and the water sprayed by the water spraying head can continue to be recycled to the water storage tank through the water suction device.

[0090] According to the above method, the water flow of the water spraying head can be adjusted by adjusting the working power of the first water suction device during the working process of the highway pavement thickness detection device, the core barrel is cooled, part of the water sprayed by the water spraying head is recovered into the water storage tank through the water suction device, the water flow of the backwater pipe is monitored to monitor the state of the filter screen, and the entire working process is monitored based on the above method. When the construction personnel feel that the drilling force of the core changes suddenly, the device is stopped, and then the thickness value of the pavement is obtained through the detection window.

[0091] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A highway pavement thickness detection device characterized by comprising: The highway pavement thickness detection device comprises a filter screen monitoring and analyzing module, which is installed on the body of the highway pavement thickness detection device, and comprises a data acquisition module, a data calculation chip and a filter screen maintenance module; the filter screen maintenance module comprises a drill core barrel and a dust removal and cooling module, and the dust removal and cooling module further comprises a water storage tank, a first water suction device, a water spraying pipe, a water spraying head, a water return pipe, a water suction ring, a filter screen, a flow sensor and a second water suction device; in operation, the first water suction device sucks water stored in the water storage tank and delivers the water to the water spraying head through the water spraying pipe, and sprays the water to the drill core barrel through the water spraying head; the water suction ring is located around the drill hole and is used for absorbing water around the drill hole; the water collected by the water suction ring is transmitted to the water storage tank through the second water suction device on the water return pipe; in the process of flowing from the water return pipe to the water storage tank, impurities in the water are filtered and recovered through the filter screen; at the same time, the flow of the water in the water return pipe is monitored through the flow sensor, so as to analyze the performance state of the filter screen; The signal input end of the data calculation chip is connected with the data acquisition module, and the signal output end of the data calculation chip is connected with the filter screen maintenance module; The data acquisition module is used for collecting temperature data of the drill core barrel at the current time and flow data of the water return pipe at each time within a set time period, and transmitting the data to the data calculation chip; The last time within the set time period is the current time; The data calculation chip is used for obtaining temperature reference data at the current time, adjusting the working power of the first water suction device in the dust removal and cooling module according to the relative size between the temperature data at the current time and the temperature reference data, and adjusting the working power of the first water suction device in the dust removal and cooling module through the filter screen maintenance module; The set time period is divided into different water flow recovery time periods, the filter screen performance index at the current time is obtained according to the similarity between each water flow recovery time period within the set time period and the flow data within the preset reference time period, and different maintenance operations are performed on the filter screen according to the filter screen performance index and the numerical change of the flow data within the set time period; The method for adjusting the working power of the first water suction device in the dust removal and cooling module through the filter screen maintenance module according to the relative size between the temperature data at the current time and the temperature reference data comprises the following steps: The ratio of the temperature data at the current time to the temperature reference data is taken as the temperature deviation index at the current time; First and second deviation thresholds are set, the first deviation threshold is less than a preset reference positive number, and the second deviation threshold is greater than the preset reference positive number; When the temperature deviation index is less than or equal to the first deviation threshold, the difference between the working power of the first water suction device at the current time and the working power of the first water suction device at the adjacent previous time and the preset reference power is taken as the working power of the first water suction device at the current time; When the temperature deviation index is greater than the first deviation threshold and less than or equal to the second deviation threshold, the working power of the first water suction device at the current time is equal to the working power of the first water suction device at the adjacent previous time; When the temperature deviation index is greater than the second deviation threshold, the sum of the working power of the first water suction device at the current time and the working power of the first water suction device at the adjacent previous time and the preset reference power is taken as the working power of the first water suction device at the current time; The method for obtaining the temperature reference data at the current time comprises the following steps: The temperature data of the first time in the set time period is set as the temperature reference data of the corresponding time, whether the working power of the first water absorber at the second time and the adjacent previous time in the set time period is equal is judged, if yes, the temperature reference data of the drill core barrel at the second time and the adjacent previous time is equal, if not, the temperature data of the drill core barrel at the second time is taken as the temperature reference data of the second time under the working power of the first water absorber at the second time, and the above process is repeated until the current time. The method for obtaining the filter screen performance index of the current time comprises the following steps: For each water flow recovery time period in the set time period, the flow data of all times in the water flow recovery time period is arranged in time sequence to obtain a flow sequence; The flow distance index between the flow sequence of each water flow recovery time period and the preset reference time period in the set time period is obtained, and the flow central value of each water flow recovery time period is obtained based on the flow data of all times in each water flow recovery time period; The matching index of each water flow recovery time period in the set time period is obtained according to the difference between the flow distance index between the flow sequence of each water flow recovery time period and the preset reference time period and the flow central value; For the matching indexes of all water flow recovery time periods in the set time period, the water flow recovery time period corresponding to the matching index less than the preset matching threshold value is recorded as a flow abnormal time period, and in the set time period, the ratio of the number of flow abnormal time periods to the number of water flow recovery time periods is taken as the filter screen performance index of the current time; The method for performing different maintenance operations on the filter screen according to the filter screen performance index and the numerical change of the flow data in the set time period comprises the following steps: If the filter screen performance index of the current time is greater than the preset performance threshold value, the filter screen is replaced; if the filter screen performance index of the current time is less than or equal to the preset performance threshold value, whether the filter screen needs to be cleaned at the current time is judged according to the difference between the flow data of the current time and all flow data in the set time period; The method for obtaining the matching index of each water flow recovery time period in the set time period comprises the following steps: For each water flow recovery time period in the set time period, the absolute value of the difference between the flow central value of the water flow recovery time period and the preset reference time period is taken as the flow difference index between the water flow recovery time period and the preset reference time period, the flow difference index and the flow distance index are respectively subjected to negative correlation mapping, and the product of the negative correlation mapping result of the flow difference index and the negative correlation mapping result of the flow distance index is subjected to normalization processing to obtain the matching index of the water flow recovery time period.

2. The highway pavement thickness detection device according to claim 1, wherein The method for judging whether the filter screen needs to be cleaned at the current time according to the difference between the flow data of the current time and all flow data in the set time period comprises the following steps: The average value of the flow central values of all water flow recovery time periods in the set time period is taken as a flow judgment value, whether the flow data of the current time is less than the flow judgment value is judged, if yes, the filter screen needs to be cleaned at the current time, and if not, the filter screen does not need to be cleaned at the current time.

3. The highway pavement thickness detection device according to claim 1, wherein The flow distance index is a DTW distance between a flow sequence of each water flow recovery time period in a set time period and a preset reference time period.

4. The highway pavement thickness detection device according to claim 1, wherein The preset reference time period is a first water flow recovery time period in the set time period.

5. The highway pavement thickness detection device of claim 1, wherein The flow central value is a mean value of flow data at all time points in each water flow recovery time period.

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