A vehicle drainage pipeline detection device and method

Abstract

The present application relates to the technical field of vehicle detection, and discloses a vehicle drainage pipeline detection device and method, the vehicle drainage pipeline detection device includes an air intake, an air intake pipe, a plurality of air flow sensors arranged at the openings of the air intake pipe and the pipeline to be tested, a sealing assembly for blocking / opening the openings of the air intake pipe and the pipeline to be tested, and a controller, the air inlet end of the air intake is connected to the purification rear side of the vehicle air intake device, the air outlet end of the air intake is connected to one end of the air intake pipe, and the other end of the air intake pipe is connected to the pipeline to be tested, the controller is electrically connected to the air flow sensor, the sealing assembly and the vehicle-mounted ECU, the controller includes: an intake flow detection module, a theoretical outlet flow matching module, an outlet flow measurement module and a fault type judgment module; the present application improves the convenience of drainage pipeline detection.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle detection, and in particular to a vehicle drainage pipe detection device and method. Background Art

[0002] In order to reduce the risk of rust, aging, mildew, short circuits and damage to electronic components, metal parts, interior trim, etc. on the vehicle due to water accumulation inside the vehicle, it is necessary to detect whether the vehicle's drainage pipes are blocked or leaking. Currently, the common drainage pipe detection method is to inject liquid into the pipe to be tested and determine the integrity of the pipe by checking whether the liquid leaks out of the pipe to be tested. However, since clean liquids such as water are transparent and highly fluid, if there is only a minor damage to the pipe to be tested, the liquid will flow along the outer wall of the pipe to be tested, making it difficult to determine the specific location of the pipe damage. If colored liquids are used to detect the pipe to be tested, it is easy to cause contamination of the vehicle's interior or exterior. On the other hand, using liquid to detect a possible damage to the pipe to be tested may cause liquid to leak into the vehicle. Therefore, the parts of the vehicle that are susceptible to liquid damage need to be waterproofed during the detection and need to be dried after the detection is completed.

[0003] At present, cars are equipped with an increasing number of on-board electrical appliances and on-board sensors. Therefore, many vehicles are equipped with an on-board ECU (Electronic Control Unit) to receive data detected by various on-board sensors and control the working status of the on-board electrical appliances. In addition, vehicles are usually also equipped with an air intake device, specifically including an engine air intake device or an air intake device for air conditioning equipment, which is used to collect air and purify it for use in the vehicle to ensure the normal operation of the engine and air conditioning equipment.

[0004] Therefore, in view of the above-mentioned related technologies, the inventors have discovered that the existing drainage pipe detection method has the problem of easily causing liquid to leak into the vehicle. Summary of the Invention

[0005] In order to improve the convenience of drainage pipe detection, the present application provides a vehicle drainage pipe detection device and method.

[0006] The first object of the invention of this application is achieved by adopting the following technical solution:

[0007] A vehicle drainage pipeline detection device includes an air intake, an air intake pipe, a plurality of air flow sensors arranged at the openings of the air intake pipe and the pipeline to be tested, a sealing assembly for blocking / opening the openings of the air intake pipe and the pipeline to be tested, and a controller. The air intake end of the air intake is connected to the purification rear side of the vehicle air intake device, the air outlet end of the air intake is connected to one end of the air intake pipe, and the other end of the air intake pipe is connected to the pipeline to be tested. The controller is electrically connected to the air flow sensor, the sealing assembly, and the vehicle-mounted ECU, and the controller includes:

[0008] An intake air flow detection module, configured to receive a pipeline detection instruction and send it to the sealing assembly and the air flow sensor to detect the intake air flow;

[0009] The theoretical outlet flow matching module is used to input the inlet flow into the airflow inlet and outflow relationship model to match the corresponding theoretical first outlet flow, theoretical second outlet flow and theoretical total outlet flow;

[0010] An outlet air flow measurement module is used to detect the measured first outlet air flow, the measured second outlet air flow and the measured total outlet air flow, and calculate the first outlet air deviation rate, the second outlet air deviation rate and the total outlet air deviation rate;

[0011] a fault type determination module, configured to determine fault type information based on the first gas outlet deviation rate, the second gas outlet deviation rate, and the total gas outlet deviation rate using a preset fault detection rule;

[0012] Among them, the measured first outlet flow rate is , the measured second outlet flow rate is , the theoretical first outlet flow rate is , theoretical second outlet flow , then the first outlet deviation rate , the second outlet deviation rate , total outgassing deviation rate C=\left [ {\frac {\left ( {{A}_{1}+{B}_{1}} \right )-\left ( {{A}_{0}+{B}_{0}} \right )} {\left ( {{A}_{0}+{B}_{0}} \right )}} \right ]\times 100\% .

[0013] By adopting the above technical solution, when the vehicle is started, the air taker takes purified air from the vehicle's air intake device and transports it to the pipeline to be tested through the air intake duct. The air flow rate at each opening of the air intake duct and the pipeline to be tested is measured by each air flow sensor, so as to judge whether the pipeline to be tested is blocked or damaged by analyzing the difference between the air intake and air outlet of the pipeline to be tested; when damage is detected in the pipeline to be tested, the sealing component can be used to close the inlet and outlet openings of the pipeline to be tested, so as to further determine the specific location of the damage based on the air leakage point of the pipeline to be tested; when the pipeline to be tested needs to be used for normal drainage, the sealing component can be used to close the passage between the air intake duct and the pipeline to be tested to reduce the possibility of the water to be discharged entering the vehicle's air intake device.

[0014] In a preferred example of the present application, the air intake pipe is provided with a check valve.

[0015] By adopting the above technical solution, a check valve is provided on the air intake pipe to reduce the possibility of polluted air to be discharged or flowing through the pipeline to be tested entering the vehicle air intake device through the air intake pipe.

[0016] In a preferred example of the present application: the sealing assembly includes an air inlet electrically controlled valve Y1 installed at the air outlet of the air intake pipe, a first air outlet electrically controlled valve Y2 at the water inlet of the pipeline to be tested, and a second air outlet electrically controlled valve Y3 at the water outlet of the pipeline to be tested.

[0017] By adopting the above technical solution, the sealing assembly includes several electrically controlled valves, among which the air inlet electrically controlled valve Y1 at the air outlet of the air intake pipe is used to open / close the passage between the air intake pipe and the pipeline to be tested, so as to stop the detection when the pipeline to be tested is draining normally, to prevent air from entering the pipeline to be tested and causing the drainage function of the pipeline to be tested to be affected; the first air outlet electrically controlled valve Y2 and the second air outlet electrically controlled valve Y3 at the water inlet and water outlet of the pipeline to be tested are used to open / close both ends of the pipeline to be tested, so as to further locate the damaged position of the pipeline to be tested by listening to the sound of air leakage in the pipeline to be tested.

[0018] In a preferred example of the present application: the air outlet of the air intake pipe is provided with a plurality of air intake branches, the number of the air intake electric control valves Y1 is consistent with the number of the air intake branches, and each of the air intake electric control valves Y1 is installed in the corresponding air intake branch, and each of the air intake branch is connected to a corresponding pipeline to be tested.

[0019] By adopting the above technical solution, the air intake duct is provided with several air intake branches, and each air intake branch is connected to a corresponding pipeline to be tested, so that the vehicle drainage pipeline detection device can detect multiple pipelines to be tested; each air intake electric control valve Y1 is installed on the corresponding air intake branch, so that the detection of each pipeline to be tested can be carried out independently.

[0020] The second object of the invention of this application is achieved by the following technical solution:

[0021] A vehicle drainage pipe detection method, applied to any of the above-mentioned vehicle drainage pipe detection devices, comprising:

[0022] receiving a pipeline detection instruction and sending it to the sealing component and the air flow sensor to detect the intake air flow;

[0023] Input the intake air flow into the airflow inlet and outflow relationship model to match the corresponding theoretical first outlet air flow, theoretical second outlet air flow and theoretical total outlet air flow;

[0024] Detecting the measured first outlet air flow rate, the measured second outlet air flow rate, and the measured total outlet air flow rate, and calculating the first outlet air deviation rate, the second outlet air deviation rate, and the total outlet air deviation rate;

[0025] Determining fault type information using a preset fault detection rule based on the first gas outlet deviation rate, the second gas outlet deviation rate, and the total gas outlet deviation rate;

[0026] Among them, the measured first outlet flow rate is , the measured second outlet flow rate is , the theoretical first outlet flow rate is , theoretical second outlet flow , then the first outlet deviation rate , the second outlet deviation rate , total outgassing deviation rate C=\left [ {\frac {\left ( {{A}_{1}+{B}_{1}} \right )-\left ( {{A}_{0}+{B}_{0}} \right )} {\left ( {{A}_{0}+{B}_{0}} \right )}} \right ]\times 100\% .

[0027] By adopting the above technical solution, when it is necessary to detect the drainage pipeline of the vehicle, a pipeline detection instruction is generated, and the received pipeline detection instruction is sent to the sealing component and the air flow sensor to control the vehicle drainage pipeline detection device to enter the detection mode, connect the air intake pipe and the pipeline to be tested, and detect the intake air flow entering the pipeline to be tested through the air intake pipe; because when the pipeline to be tested is unobstructed and there is no air leakage, there is a specific relationship between the air flow flowing out of each opening of the pipeline to be tested and the air flow flowing in through the air intake pipe, therefore, the intake air flow is input into the air flow inlet and outlet relationship model to match the corresponding theoretical first outlet air flow, theoretical second outlet air flow and theoretical total outlet air flow, so as to Subsequently, the measured values are compared; the measured first outlet air flow rate and the measured second outlet air flow rate are detected by the air flow sensor, and the measured total outlet air flow rate is calculated; based on the theoretical first outlet air flow rate, the theoretical second outlet air flow rate, the theoretical total outlet air flow rate and the measured first outlet air flow rate, the measured second outlet air flow rate, and the measured total outlet air flow rate, the first outlet air deviation rate, the second outlet air deviation rate, and the total outlet air deviation rate are calculated to determine the deviation between the pipeline to be tested and the ideal state; based on the first outlet air deviation rate, the second outlet air deviation rate, and the total outlet air deviation rate, according to the preset fault detection rules, determine whether there is a fault in the pipeline to be tested, and if there is a fault, further determine the fault type information.

[0028] In a preferred embodiment of the present application, the inputting of the intake air flow into the airflow inlet and outflow relationship model and matching the corresponding theoretical first outlet air flow, theoretical second outlet air flow and theoretical total outlet air flow include:

[0029] obtaining a rated flow rate of the air intake device, and determining a plurality of test sampling flow rate data based on the rated flow rate;

[0030] When a hair dryer is used to introduce a test airflow into the air extractor, the air inlet flow is detected in real time, and the first air outlet flow and the second air outlet flow corresponding to a number of test sampling flow data are collected, and an airflow inlet and outlet relationship model is generated after fitting through a regression algorithm.

[0031] By adopting the above technical solution, the rated flow of the air intake device is obtained in order to analyze the maximum air flow that the air intake device can input into the air intake pipe, and then determine a number of test sampling flow data for experimental data sampling; when a hair dryer is used to introduce a test airflow into the air intake of the vehicle drainage pipe detection device, the intake flow is detected in real time, and when the intake flow is equivalent to each test sampling flow data, the corresponding first outlet flow data and second outlet flow data are collected, and after fitting the collected data using a regression algorithm, an airflow inlet and outlet relationship model is created, so that the theoretical outlet flow of each opening of the pipeline to be tested can be matched subsequently according to the intake flow.

[0032] In a preferred example of the present application, the fault type information is determined by a preset fault detection rule based on the first gas outlet deviation rate, the second gas outlet deviation rate, and the total gas outlet deviation rate, including:

[0033] If the total gas outlet deviation rate is less than the preset leakage threshold, a leakage fault signal is generated;

[0034] If one of the first outlet gas deviation rate and the second outlet gas deviation rate is greater than the preset outlet gas blockage threshold, a blockage fault signal is generated;

[0035] The leakage threshold is a negative value, and the outlet gas blockage threshold is a positive value.

[0036] By adopting the above technical solution, the fault type information is judged based on the first air outlet deviation rate, the second air outlet deviation rate, and the total air outlet deviation rate. A negative leakage threshold and a positive air outlet blockage threshold need to be preset. The technical solution of the present application gives priority to analyzing the leakage fault to prevent the coexistence of the leakage fault and the blockage fault from affecting the judgment of the blockage fault; since when the pipeline to be tested leaks, it will inevitably cause the air flow entering the pipeline to be tested to be less than the air flow out of the opening of the pipeline to be tested. When the total air outlet deviation rate is greater than the preset leakage threshold, a leakage fault signal is generated to remind the car owner that there is a leakage problem in the pipeline to be tested; since the blockage of one end / section of the pipeline to be tested will hinder the airflow and prompt part of the airflow to flow toward the other end / section, causing the air flow at the other end / section to increase, therefore, if the air outlet flow at any opening of the pipeline to be tested is large relative to the theoretical air outlet flow, and the deviation rate is greater than the preset air outlet blockage threshold, a blockage fault signal is generated to remind the car owner that there is a blockage problem in the pipeline to be tested.

[0037] In a preferred example of the present application, if the total gas outlet deviation rate is less than a preset leakage threshold, after generating a leakage fault signal, the method further includes:

[0038] receiving a positioning detection instruction and sending the sealing component to connect the air intake pipe with the pipeline to be tested and to seal the opening of the pipeline to be tested;

[0039] The positioning detection command is sent to the vehicle ECU to control the intake device to increase the intake power.

[0040] By adopting the above technical solution, when it is determined that there is a leakage fault in the pipeline to be tested, a positioning detection instruction is received and sent to the sealing component, thereby connecting the air intake duct and the pipeline to be tested so that air can flow into the pipeline to be tested, and at the same time closing the opening of the pipeline to be tested, so that the specific location of the leakage fault can be determined later by listening to the sound of air leakage or observing the leakage situation; the positioning detection instruction is sent to the vehicle-mounted ECU to control the intake device to increase the intake power, facilitate the observation of the leakage phenomenon, and increase the efficiency of leakage fault locating.

[0041] In a preferred embodiment of the present application, the method further includes:

[0042] When the intake device start signal is obtained from the vehicle ECU, a pipeline detection instruction is generated;

[0043] The intake power of the intake device is detected, and when the intake power exceeds a preset power threshold for the first time during a working task of the intake device, a pipeline detection instruction is generated.

[0044] By adopting the above technical solution, when the vehicle is started, the driver usually turns on the air conditioner or starts the engine. When the air intake device is started, the air intake device start signal is obtained from the on-board ECU, thereby generating a pipeline detection instruction to perform a detection work on the pipeline to be tested, thereby automatically executing the detection of the pipeline to be tested every time the owner uses the vehicle, and the owner does not need to pay special attention to the status of the pipeline to be tested; on the other hand, since the engine or air conditioner may be in a low-power operating state in the initial stage after the vehicle is started, if the pipeline to be tested is only slightly blocked or damaged, the low flow rate of gas provided by the air intake duct may have a poor detection effect. When the intake power is greater than the preset power threshold for the first time during each use of the vehicle, the pipeline to be tested is detected again to further improve the possibility of detecting a fault in the pipeline to be tested.

[0045] In a preferred embodiment of the present application, the method further includes:

[0046] Obtain rainfall detection data. When the rainfall detection data is greater than the preset rainfall threshold, generate a detection termination instruction and send it to the sealing component to seal the air intake pipe and the pipeline to be tested, and keep the pipeline to be tested unobstructed.

[0047] By adopting the above technical solution, rainfall detection data is obtained to determine the current rainfall conditions. When the rainfall detection data is greater than the preset rainfall threshold, if the pipeline to be tested is tested, it is easy to affect the normal drainage of the pipeline to be tested. Therefore, an abort detection instruction is generated and sent to the sealing component to control the closure between the air intake pipe and the pipeline to be tested, and to make the pipeline to be tested unobstructed to ensure normal drainage of the pipeline to be tested.

[0048] In summary, this application includes at least one of the following beneficial technical effects:

[0049] 1. When the vehicle is started, the air intake draws purified air from the vehicle's air intake system and delivers it to the pipeline under test through the air intake duct. Air flow sensors measure the airflow at each opening of the air intake duct and the pipeline under test. By analyzing the difference in air intake and air outlet volume, the difference in air flow can be determined to determine whether the pipeline under test is clogged or damaged. If damage is detected in the pipeline under test, the sealing assembly can be used to seal the inlet and outlet openings of the pipeline under test, so that the specific location of the damage can be further determined based on the air leakage point in the pipeline under test. If the pipeline under test needs to be used for normal drainage, the sealing assembly can be used to seal the passage between the air intake duct and the pipeline under test to reduce the possibility of the discharged water entering the vehicle's air intake system.

[0050] 2. When it is necessary to inspect the vehicle's drainage pipe, a pipe inspection instruction is generated and the received pipe inspection instruction is sent to the sealing component and the air flow sensor to control the vehicle's drainage pipe inspection device to enter the inspection mode, connect the air intake pipe with the pipe to be tested, and detect the intake air flow entering the pipe to be tested through the air intake pipe; because when the pipe to be tested is unobstructed and there is no air leakage, there is a specific relationship between the air flow outflowing from each opening of the pipe to be tested and the air flow flowing into the pipe through the air intake pipe. Therefore, the intake air flow is input into the air flow inlet and outflow relationship model to match the corresponding theoretical first outlet air flow, theoretical second outlet air flow and theoretical total outlet air flow, so as to subsequently compare with the measured value Make a comparison; detect the measured first outlet air flow rate and the measured second outlet air flow rate through the air flow sensor, calculate the measured total outlet air flow rate, and calculate the first outlet air deviation rate, the second outlet air deviation rate and the total outlet air deviation rate based on the theoretical first outlet air flow rate, the theoretical second outlet air flow rate, the theoretical total outlet air flow rate and the measured first outlet air flow rate, the measured second outlet air flow rate and the measured total outlet air flow rate, so as to judge the deviation of the pipeline to be tested from the ideal state; based on the first outlet air deviation rate, the second outlet air deviation rate and the total outlet air deviation rate, and then according to the preset fault detection rules, determine whether there is a fault in the pipeline to be tested, and if there is a fault, further determine the fault type information.

[0051] 3. After starting the vehicle, the driver typically turns on the air conditioner or starts the engine. When the air intake system is activated, the onboard ECU receives an intake system activation signal, generating a pipeline test command to perform a test on the pipeline under test. This allows the pipeline under test to be automatically tested each time the driver uses the vehicle, eliminating the need for the driver to specifically monitor the pipeline's status. Furthermore, in the initial stages after vehicle startup, the engine or air conditioner may be operating at low power. If the pipeline under test is only slightly blocked or damaged, the lower flow rate of air provided by the air intake duct may result in poor detection results. Therefore, the pipeline under test is tested again the first time the intake power exceeds the preset power threshold during each use of the vehicle, further increasing the probability of detecting pipeline faults. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a structural diagram of the vehicle drainage pipe detection device in Example 1 of the present application.

[0053] Figure 2 This is a principle block diagram of the controller in Example 1 of the present application.

[0054] Figure 3 This is a flow chart of the vehicle drainage pipe detection method in Example 2 of the present application.

[0055] Figure 4 This is a flowchart of step S20 in the vehicle drainage pipe detection method in Example 2 of the present application.

[0056] Figure 5 This is a flowchart of step S40 in the vehicle drainage pipe detection method in Example 2 of the present application.

[0057] Figure 6 This is another flow chart of step S40 in the vehicle drainage pipe detection method in Example 2 of the present application.

[0058] Figure 7 This is another flow chart of the vehicle drainage pipe detection method in Example 2 of the present application.

[0059] Description of reference numerals:

[0060] 100. Air intake device; 200. Pipeline to be tested; 1. Air intake device; 2. Air intake duct; 21. Air intake branch pipe; 3. Air flow sensor; 4. Sealing assembly; 5. Check valve. DETAILED DESCRIPTION

[0061] The following is combined with Figures 1 to 7 This application is described in further detail. Example 1

[0062] Reference Figure 1 The present application discloses a vehicle drainage pipe detection device, which is applied to a vehicle equipped with an air intake device 100 of an engine and / or air-conditioning equipment, an on-board ECU, and a drainage pipe. The vehicle drainage pipe detection device includes an air intake 1, an air intake pipe 2, a plurality of air flow sensors 3, a sealing assembly 4 and a controller (not shown in the figure). The air intake end of the air intake 1 is connected to the purification rear side of the vehicle air intake device 100, the air outlet end of the air intake 1 is connected to one end of the air intake pipe 2, and the other end of the air intake pipe 2 is connected to the pipeline to be tested 200. The air flow sensor 3 is arranged at the opening of the air intake pipe 2 near one end of the pipeline to be tested 200 and at each opening of the pipeline to be tested 200. The sealing assembly 4 is also arranged at the opening of the air intake pipe 2 near one end of the pipeline to be tested 200 and at each opening of the pipeline to be tested 200.

[0063] Among them, the pipeline to be tested 200 refers to a drainage pipeline that needs to be detected for blockage faults and leakage faults; the air intake device 100 is provided with an air purifier, which specifically includes an air filter element. The air intake device 100 is used to purify the outside air and supply it to the engine or air-conditioning equipment, wherein the purified rear side refers to the side of the air purifier away from the contact surface of the outside air, the air intake 1 is used to obtain clean airflow from the air intake device 100, and the air intake duct 2 is used to transport the clean airflow to the pipeline to be tested 200. The air intake duct 2 is provided with a check valve 5 so that when the pipeline to be tested 200 is draining or testing, the possibility of contaminated air to be discharged or flowing through the pipeline to be tested 200 is reduced to enter the vehicle's air intake device 100 through the air intake duct 2.

[0064] Several flow sensors are used to detect the air flow rate entering the pipeline to be tested 200 from the air intake pipe 2, and the air flow rate flowing out from each opening of the pipeline to be tested 200; the flow sensors include an air inlet flow meter X1 installed at the air outlet of the air intake pipe 2, a first air outlet flow meter X2 at the water inlet of the pipeline to be tested 200, and a second air outlet flow meter X3 at the water outlet of the pipeline to be tested 200. Specifically, if the pipeline to be tested 200 includes multiple water inlets and / or water outlets, more flow meters can also be set according to actual needs, so as to independently measure the air flow data of each inlet / water outlet of the pipeline to be tested 200; so as to judge whether there is a leakage problem in the pipeline to be tested 200 by comparing the difference between the air intake and air outlet, and to judge whether there is a blockage and the location of the blockage by the difference in the air outlet data of each water inlet or water outlet.

[0065] The sealing component 4 is used to block or open the air flow channel between the air intake pipe 2 and the pipeline to be tested 200, as well as the air flow channel at each opening of the pipeline to be tested 200; the sealing component 4 includes an air inlet electrically controlled valve Y1 installed at the air outlet of the air intake pipe 2, a first air outlet electrically controlled valve Y2 at the water inlet of the pipeline to be tested 200, and a second air outlet electrically controlled valve Y3 at the water outlet of the pipeline to be tested 200. Specifically, if the pipeline to be tested 200 includes multiple water inlets and / or water outlets, more electrically controlled valves can be provided according to actual needs so as to independently control the opening / closing state of each air flow channel of the inlet / outlet of the pipeline to be tested 200. The electrically controlled valve refers to An air flow valve that can be controlled to open / close by an electrical signal; the air inlet electrically controlled valve Y1 at the air outlet of the air intake pipe 2 is used to open / close the passage between the air intake pipe 2 and the pipeline to be tested 200, so as to stop the detection when the pipeline to be tested 200 is draining normally, to prevent air from entering the pipeline to be tested 200 and affecting the drainage function of the pipeline to be tested 200; the first air outlet electrically controlled valve Y2 and the second air outlet electrically controlled valve Y3 at the water inlet and water outlet of the pipeline to be tested 200 are used to open / close both ends of the pipeline to be tested 200, so as to further locate the damaged position of the pipeline to be tested by listening to the sound of air leakage in the pipeline to be tested after determining that there is a damaged fault in the pipeline to be tested.

[0066] When the vehicle is started, the air intake device 1 takes purified air from the vehicle air intake device 100 and transports it to the test pipeline 200 through the air intake duct 2. The air flow rate at each opening of the air intake duct 2 and the test pipeline 200 is measured by each air flow sensor 3. By analyzing the difference between the air intake and air outlet of the test pipeline 200, it is determined whether the test pipeline 200 is blocked or damaged. When damage is detected in the test pipeline 200, the sealing component 4 can be used to close the inlet and outlet openings of the test pipeline 200, so as to further determine the specific location of the damage based on the air leakage point of the test pipeline 200. The method for determining the specific location of the damage can be to listen to the air leakage sound or use thermal imaging equipment to observe the temperature mutation point of the test pipeline 200. When the test pipeline 200 needs to be used for normal drainage, the sealing component 4 can be used to close the passage between the air intake duct 2 and the test pipeline 200 to reduce the possibility of the water to be discharged entering the vehicle air intake device 100.

[0067] Furthermore, the air outlet of the air intake pipe 2 is provided with a plurality of air intake branches 21, the number of the air intake electronically controlled valves Y1 is consistent with the number of the air intake branches 21, and each air intake electronically controlled valve Y1 is installed in the corresponding air intake branch pipe 21, and each air intake branch pipe 21 is connected to a corresponding pipeline to be tested 200, so that the vehicle drainage pipeline detection device can detect multiple pipelines to be tested 200, and each air intake electronically controlled valve Y1 is installed in the corresponding air intake branch pipe 21, so that the detection of each pipeline to be tested 200 can be carried out independently.

[0068] The controller is electrically connected to the air flow sensor 3, the sealing assembly 4 and the vehicle ECU so as to control the operation of the vehicle drainage pipe detection device according to a preset computer program, such as Figure 2 As shown, the controller includes an intake flow detection module, a theoretical outlet flow matching module, an outlet flow measurement module, and a fault type judgment module. The detailed description of each functional module is as follows:

[0069] An intake air flow detection module, configured to receive a pipeline detection instruction and send it to the sealing assembly 4 and the air flow sensor 3 to detect the intake air flow;

[0070] The theoretical outlet flow matching module is used to input the inlet flow into the airflow inlet and outflow relationship model to match the corresponding theoretical first outlet flow, theoretical second outlet flow and theoretical total outlet flow;

[0071] An outlet air flow measurement module is used to detect the measured first outlet air flow, the measured second outlet air flow and the measured total outlet air flow, and calculate the first outlet air deviation rate, the second outlet air deviation rate and the total outlet air deviation rate;

[0072] The fault type judgment module is used to determine the fault type information based on the first gas outlet deviation rate, the second gas outlet deviation rate, and the total gas outlet deviation rate through a preset fault detection rule.

[0073] Among them, the measured first outlet flow rate is , the measured second outlet flow rate is , the theoretical first outlet flow rate is , theoretical second outlet flow , then the first outlet deviation rate , the second outlet deviation rate , total outgassing deviation rate C=\left [ {\frac {\left ( {{A}_{1}+{B}_{1}} \right )-\left ( {{A}_{0}+{B}_{0}} \right )} {\left ( {{A}_{0}+{B}_{0}} \right )}} \right ]\times 100\% .

[0074] For the specific limitations of the controller, please refer to the limitations of the vehicle drainage pipe detection method below and will not be repeated here; the various modules in the above-mentioned controller can be implemented in whole or in part through software, hardware and their combination; the above-mentioned modules can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory of the computer device in software form, so that the processor can call and execute the corresponding operations of the above-mentioned modules. Example 2

[0075] Reference Figure 3 The present application discloses a vehicle drainage pipe detection method, which is applied to the vehicle drainage pipe detection device in the above-mentioned embodiment 1, and specifically includes the following steps:

[0076] S10: receiving a pipeline detection instruction and sending it to the sealing component and the air flow sensor to detect the intake air flow.

[0077] In this embodiment, the pipeline detection instruction refers to an instruction for controlling the vehicle drainage pipeline detection device to start detecting the pipeline to be tested. Specifically, it can be triggered by the vehicle owner on the vehicle ECU, or it can be automatically triggered according to preset specific conditions.

[0078] Specifically, when it is necessary to inspect the vehicle's drainage pipeline, a pipeline inspection instruction is generated, and the received pipeline inspection instruction is sent to the sealing assembly and the air flow sensor to connect the air flow channel between the air intake pipe and the pipeline to be tested. At the same time, the air flow channels at the water inlet and outlet of the pipeline to be tested are opened to control the vehicle drainage pipeline detection device to enter the detection mode and detect the air intake flow entering the pipeline to be tested through the air intake pipe.

[0079] S20: Inputting the intake air flow into the airflow inlet and outflow relationship model to match the corresponding theoretical first outlet air flow, theoretical second outlet air flow, and theoretical total outlet air flow.

[0080] In this embodiment, the theoretical first air outlet flow rate refers to the air outlet flow rate at the water inlet of the test pipeline when the test pipeline is in a theoretical state, the theoretical second air outlet flow rate refers to the air outlet flow rate at the water outlet of the test pipeline when the test pipeline is in a theoretical state, and the theoretical total air outlet flow rate refers to the sum of the theoretical first air outlet flow rate and the theoretical second air outlet flow rate; the air flow inlet and outlet relationship model refers to a model with built-in data on the relationship between the air intake flow rate and the theoretical first air outlet flow rate, the air intake flow rate and the theoretical second air outlet flow rate, and the air intake flow rate and the theoretical total air outlet flow rate when the test pipeline is unobstructed.

[0081] Specifically, since when the pipeline to be tested is unobstructed and there is no leakage, there is a specific relationship between the air flow outflowing from each opening of the pipeline to be tested and the air flow flowing in through the air intake pipe. Therefore, the intake air flow is input into the air flow inlet and outlet relationship model to match the corresponding theoretical first outlet air flow, theoretical second outlet air flow and theoretical total outlet air flow, so as to be compared with the actual measured value later.

[0082] Among them, such as Figure 4 As shown, in step S20, it includes:

[0083] S21: Acquire a rated flow rate of the air intake device, and determine a number of test sampling flow rate data based on the rated flow rate.

[0084] In this embodiment, the rated flow rate of the air intake device refers to the maximum air flow rate that the air intake device can continuously and stably supply. The rated flow rate can be directly obtained based on the parameters of the air intake device, or can be measured when the air intake device is operating at rated power.

[0085] Specifically, the rated flow rate of the air intake device is obtained in order to analyze the maximum air flow rate that the air intake device can stably input into the air intake pipe, and then determine a number of test sampling flow rate data for experimental data sampling; preferably, if the rated flow rate is N, the several test sampling flow rate data can be set to 0.1N, 0.2N, 0.3N, 0.4N, 0.5N, 0.6N, 0.7N, 0.8N, 0.9N, and 1.0N.

[0086] S22: When a hair dryer is used to introduce a test airflow into the air extractor, the air inlet flow rate is detected in real time, and a first air outlet flow rate and a second air outlet flow rate corresponding to a number of test sampling flow rate data are collected, and an airflow inlet and outlet relationship model is generated after fitting through a regression algorithm.

[0087] Specifically, when a hair dryer is used to introduce a test airflow into the air intake of the vehicle drainage pipe detection device, the intake flow is detected in real time. When the intake flow is equivalent to the test sampling flow data of each test, the corresponding first outlet flow data and second outlet flow data are collected. After fitting the collected data using a regression algorithm, an airflow inlet and outlet relationship model is created to subsequently match the theoretical outlet flow of each opening of the pipeline to be tested according to the intake flow.

[0088] Furthermore, the theoretical outlet flow matching module also includes:

[0089] a test sampling flow rate data determination submodule, configured to obtain a rated flow rate of the air intake device and determine a number of test sampling flow rate data based on the rated flow rate;

[0090] The airflow inlet and outlet relationship model generation submodule is used to detect the air intake flow in real time when a hair dryer is used to pass the test airflow into the air extractor, collect the first air outlet flow and the second air outlet flow corresponding to a number of test sampling flow data, and generate the airflow inlet and outlet relationship model after fitting through a regression algorithm.

[0091] S30: Detecting the measured first outlet air flow rate, the measured second outlet air flow rate, and the measured total outlet air flow rate, and calculating the first outlet air deviation rate, the second outlet air deviation rate, and the total outlet air deviation rate.

[0092] In this embodiment, the measured first air outlet flow rate refers to the air outlet flow rate measured at the water inlet of the measured pipeline, the measured second air outlet flow rate refers to the air outlet flow rate measured at the water outlet of the measured pipeline, and the measured total air outlet flow rate refers to the sum of the measured first air outlet flow rate and the measured second air outlet flow rate.

[0093] Specifically, the measured first outlet air flow rate and the measured second outlet air flow rate are detected by the air flow sensor, and the measured total outlet air flow rate is calculated. Based on the measured first outlet air flow rate, the measured second outlet air flow rate, the measured total outlet air flow rate, and the theoretical first outlet air flow rate, the theoretical second outlet air flow rate, and the theoretical total outlet air flow rate, the first outlet air deviation rate, the second outlet air deviation rate, and the total outlet air deviation rate are calculated; wherein, assuming that the measured first outlet air flow rate is , the measured second outlet flow rate is , the theoretical first outlet flow rate is , theoretical second outlet flow , then the first outlet deviation rate , the second outlet deviation rate , total outgassing deviation rate C=\left [ {\frac {\left ( {{A}_{1}+{B}_{1}} \right )-\left ( {{A}_{0}+{B}_{0}} \right )} {\left ( {{A}_{0}+{B}_{0}} \right )}} \right ]\times 100\% .

[0094] Specifically, based on the theoretical first outlet air flow rate, the theoretical second outlet air flow rate, the theoretical total outlet air flow rate and the measured first outlet air flow rate, the measured second outlet air flow rate, and the measured total outlet air flow rate, the first outlet air deviation rate, the second outlet air deviation rate, and the total outlet air deviation rate are calculated to determine the deviation between the pipeline to be tested and the ideal state.

[0095] S40: Based on the first outgoing gas deviation rate, the second outgoing gas deviation rate, and the total outgoing gas deviation rate, determine fault type information using a preset fault detection rule.

[0096] In this embodiment, the fault detection rule refers to a preset rule for analyzing the fault type according to the first outgoing gas deviation rate, the second outgoing gas deviation rate, and the total outgoing gas deviation rate.

[0097] Specifically, based on the first outlet gas deviation rate, the second outlet gas deviation rate and the total outlet gas deviation rate, and according to the preset fault detection rules, it is determined whether there is a fault in the pipeline to be tested. If there is a fault, the fault type information is further determined.

[0098] Among them, such as Figure 5 As shown, in step S40, it includes:

[0099] S41: If the total gas outlet deviation rate is less than a preset leakage threshold, a leakage fault signal is generated.

[0100] In this embodiment, the leakage threshold is a negative value. Preferably, the leakage threshold can be set to -5%.

[0101] Specifically, based on the first air outlet deviation rate, the second air outlet deviation rate, and the total air outlet deviation rate, the fault type information is judged. A negative leakage threshold and a positive air outlet blockage threshold need to be preset. The technical solution of the present application gives priority to analyzing leakage faults to prevent the coexistence of leakage faults and blockage faults from affecting the judgment of blockage faults; when the pipeline to be tested leaks, the air flow entering the pipeline to be tested will inevitably be less than the air flow out of the opening of the pipeline to be tested. When the total air outlet deviation rate is greater than the preset leakage threshold, a leakage fault signal is generated to remind the car owner that there is a leakage problem in the pipeline to be tested.

[0102] S42: If one of the first outlet gas deviation rate and the second outlet gas deviation rate is greater than a preset outlet gas blockage threshold, a blockage fault signal is generated.

[0103] In this embodiment, the separated gas blockage threshold is a positive value. Preferably, the separated gas blockage threshold can be set to 5%.

[0104] Specifically, since the blockage of one end / section of the pipeline to be tested will hinder the airflow and cause part of the airflow to flow toward the other end / section, causing the air flow at the other end / section to increase, therefore, if the outlet air flow at any opening of the pipeline to be tested is larger than the theoretical outlet air flow, and the deviation rate is greater than the preset outlet air blockage threshold, a blockage fault signal is generated to remind the car owner that there is a blockage problem in the pipeline to be tested.

[0105] Furthermore, a total air outlet blockage threshold can be pre-set, wherein the total air outlet blockage threshold should be a negative value and greater than or equal to the leakage threshold. Preferably, the total air outlet blockage threshold can be set to -2%; if the total air outlet deviation rate is greater than the preset total air outlet blockage threshold, it is considered that there is no leakage problem in the pipeline to be tested.

[0106] Furthermore, the fault type judgment module also includes:

[0107] A leakage fault signal generating submodule, configured to generate a leakage fault signal if the total gas outlet deviation rate is less than a preset leakage threshold;

[0108] The blockage fault signal generating submodule is configured to generate a blockage fault signal if one of the first outlet gas deviation rate and the second outlet gas deviation rate is greater than a preset outlet gas blockage threshold.

[0109] Among them, such as Figure 6 As shown, after step S40, the following steps are further included:

[0110] S43: receiving the positioning detection instruction and sending the sealing assembly to connect the air intake pipe with the pipeline to be tested and to seal the opening of the pipeline to be tested.

[0111] In this embodiment, the positioning detection instruction refers to an instruction for triggering a positioning detection operation on a leakage fault in the pipeline to be tested.

[0112] Specifically, after preliminary detection determines that there is a leakage fault in the pipeline to be tested, a positioning detection instruction is received and sent to the sealing component, thereby connecting the air intake pipe and the pipeline to be tested so that air can flow into the pipeline to be tested, and at the same time close the opening of the pipeline to be tested, so that the specific location of the leakage fault can be determined later by listening to the sound of air leakage or observing the leakage situation.

[0113] S44: Sending a positioning detection instruction to the vehicle-mounted ECU to control the intake device to increase the intake power.

[0114] Specifically, a positioning detection instruction is sent to the vehicle-mounted ECU to control the air intake device to increase the air intake power, facilitate observation of air leakage, and increase the efficiency of leakage fault positioning.

[0115] Among them, the fault type judgment submodule also includes:

[0116] The pipeline sealing submodule to be tested is used to receive the positioning detection instruction and send the sealing component to connect the air intake pipe with the pipeline to be tested and seal the opening of the pipeline to be tested;

[0117] The intake power control submodule is used to send positioning detection instructions to the vehicle ECU to control the intake device to increase the intake power.

[0118] Among them, such as Figure 7 As shown, the vehicle drainage pipe detection method further includes:

[0119] S50: When the intake device start signal from the vehicle-mounted ECU is obtained, a pipeline detection instruction is generated.

[0120] In this embodiment, the air intake device start signal may be automatically generated after the engine air intake device is started, or may be automatically generated after the air conditioning air intake device is started.

[0121] Specifically, when the vehicle is started, the driver usually turns on the air conditioner or starts the engine. When the air intake device is started, the air intake device start signal is obtained from the on-board ECU, thereby generating a pipeline detection instruction to perform a test on the pipeline to be tested, thereby automatically executing the test on the pipeline to be tested every time the owner uses the vehicle, without the owner having to pay special attention to the status of the pipeline to be tested.

[0122] S60: Detecting the intake power of the intake device. During a working task of the intake device, when the intake power is greater than a preset power threshold for the first time, a pipeline detection instruction is generated.

[0123] Specifically, on the other hand, since the engine or air conditioner may be in a low-power operating state in the initial stage after the vehicle is started, if the pipeline to be tested is only slightly blocked or damaged, the lower flow rate of gas provided by the air intake duct may have a poor detection effect. When the intake power is greater than the preset power threshold for the first time during each use of the vehicle, the pipeline to be tested is tested again to further increase the possibility of detecting a fault in the pipeline to be tested. Preferably, the power threshold can be set to 0.7N.

[0124] Furthermore, the controller further includes:

[0125] Start the automatic detection module, which is used to generate a pipeline detection instruction when obtaining the intake device start signal from the vehicle ECU;

[0126] The high-power automatic detection module is used to detect the intake power of the intake device. During a working task of the intake device, when the intake power exceeds the preset power threshold for the first time, a pipeline detection instruction is generated.

[0127] The vehicle drainage pipe detection method further includes:

[0128] S70: Obtaining rainfall detection data. When the rainfall detection data is greater than a preset rainfall threshold, generating a detection termination instruction and sending it to the sealing component, so that the air intake pipe and the pipeline to be tested are sealed and the pipeline to be tested is unblocked.

[0129] In this embodiment, the rainfall detection data may be a weather report from an authoritative meteorological department, or may be measured by a vehicle-mounted rainfall sensor.

[0130] Specifically, rainfall detection data is obtained to determine the current rainfall conditions. When the rainfall detection data is greater than the preset rainfall threshold, if the pipeline to be tested is tested, it is easy to affect the normal drainage of the pipeline to be tested. Therefore, a detection termination instruction is generated and sent to the sealing component to control the closure between the air intake pipe and the pipeline to be tested, and to make the pipeline to be tested unobstructed, so that when rain is detected, the detection function is automatically turned off to ensure normal drainage of the pipeline to be tested.

[0131] Furthermore, the controller further includes:

[0132] The detection termination instruction sending module is used to obtain rainfall detection data. When the rainfall detection data is greater than the preset rainfall threshold, a detection termination instruction is generated and sent to the sealing component to seal the air intake pipe and the pipeline to be tested, and the pipeline to be tested is unblocked.

[0133] It should be understood that the serial numbers of the steps in the above embodiments do not imply the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0134] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the above-described method embodiments. Any reference to memory, storage, database, or other media used in the various embodiments provided herein may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink), DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct RAMbus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM).

[0135] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0136] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments may still be modified, or some of the features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A vehicle drainage pipe detection device, characterized in that: The invention comprises an air intake device (1), an air intake pipe (2), a plurality of air flow sensors (3) arranged at the openings of the air intake pipe (2) and the pipeline to be tested (200), a sealing component (4) for blocking or opening the openings of the air intake pipe (2) and the pipeline to be tested (200), and a controller, wherein the air intake end of the air intake device (1) is connected to the purification rear side of the air intake device (100) of the vehicle, the air outlet end of the air intake device (1) is connected to one end of the air intake pipe (2), the other end of the air intake pipe (2) is connected to the pipeline to be tested (200), and the controller is electrically connected to the air intake device (100). A flow sensor (3), a sealing assembly (4) and an on-vehicle ECU, wherein the sealing assembly (4) comprises an air inlet electric control valve Y1 installed at the air outlet of the air intake pipe (2), a first air outlet electric control valve Y2 at the water inlet of the test pipeline (200), and a second air outlet electric control valve Y3 at the water outlet of the test pipeline (200); the air flow sensor comprises an air inlet sensor installed at the air outlet of the air intake pipe (2), a first air outlet sensor at the water inlet of the test pipeline (200), and a second air outlet sensor at the water outlet of the test pipeline (200); and the controller comprises: An intake air flow detection module, used for receiving a pipeline detection instruction and sending it to the sealing component (4) and the air flow sensor (3) to detect the intake air flow; The theoretical outlet air flow matching module is used to input the inlet air flow into the air flow inlet and outlet relationship model to match the corresponding theoretical first outlet air flow, theoretical second outlet air flow and theoretical total outlet air flow; An outlet air flow measurement module is used to detect the measured first outlet air flow, the measured second outlet air flow and the measured total outlet air flow, and calculate the first outlet air deviation rate, the second outlet air deviation rate and the total outlet air deviation rate; a fault type determination module, configured to determine fault type information based on the first gas outlet deviation rate, the second gas outlet deviation rate, and the total gas outlet deviation rate using a preset fault detection rule; Among them, the measured first outlet flow rate is , the measured second outlet flow rate is , the theoretical first outlet flow rate is , theoretical second outlet flow , then the first outlet deviation rate , the second outlet deviation rate , total gas deviation rate .

2. A vehicle drainage pipe detection device according to claim 1, characterized in that: The air intake pipe (2) is provided with a check valve (5).

3. The vehicle drainage pipe detection device according to claim 1, characterized in that: The air outlet of the air intake pipe (2) is provided with a plurality of air intake branches (21), the number of the air intake electric control valves Y1 is consistent with the number of the air intake branches (21), and each of the air intake electric control valves Y1 is installed on a corresponding air intake branch (21), and each of the air intake branch pipes (21) is connected to a corresponding pipeline (200) to be tested.

4. A vehicle drainage pipeline detection method, characterized in that: The vehicle drainage pipe detection device according to any one of claims 1 to 3 comprises: receiving a pipeline detection instruction and sending it to the sealing component and the air flow sensor to detect the intake air flow; Input the intake air flow into the airflow inlet and outflow relationship model to match the corresponding theoretical first outlet air flow, theoretical second outlet air flow and theoretical total outlet air flow; Detecting the measured first outlet air flow rate, the measured second outlet air flow rate, and the measured total outlet air flow rate, and calculating the first outlet air deviation rate, the second outlet air deviation rate, and the total outlet air deviation rate; Determining fault type information using a preset fault detection rule based on the first gas outlet deviation rate, the second gas outlet deviation rate, and the total gas outlet deviation rate; Among them, the measured first outlet flow rate is , the measured second outlet flow rate is , the theoretical first outlet flow rate is , theoretical second outlet flow , then the first outlet deviation rate , the second outlet deviation rate , total gas deviation rate .

5. A vehicle drainage pipe detection method according to claim 4, characterized in that: Before inputting the intake air flow into the airflow inlet and outlet relationship model and matching the corresponding theoretical first outlet air flow, theoretical second outlet air flow, and theoretical total outlet air flow, the method includes: obtaining a rated flow rate of the air intake device, and determining a plurality of test sampling flow rate data based on the rated flow rate; When a hair dryer is used to introduce a test airflow into the air extractor, the air inlet flow is detected in real time, and the first air outlet flow and the second air outlet flow corresponding to a number of test sampling flow data are collected, and an airflow inlet and outlet relationship model is generated after fitting through a regression algorithm.

6. A vehicle drainage pipe detection method according to claim 4, characterized in that: The determining of the fault type information based on the first gas outlet deviation rate, the second gas outlet deviation rate, and the total gas outlet deviation rate by using a preset fault detection rule includes: If the total gas outlet deviation rate is less than the preset leakage threshold, a leakage fault signal is generated; If one of the first outlet gas deviation rate and the second outlet gas deviation rate is greater than the preset outlet gas blockage threshold, a blockage fault signal is generated; The leakage threshold is a negative value, and the outlet gas blockage threshold is a positive value.

7. A vehicle drainage pipe detection method according to claim 6, characterized in that: If the total gas outlet deviation rate is less than the preset leakage threshold, after generating a leakage fault signal, the method further includes: receiving a positioning detection instruction and sending it to the sealing component, so that the air intake pipe is connected to the pipeline to be tested and the opening of the pipeline to be tested is sealed; The positioning detection command is sent to the vehicle ECU to control the intake device to increase the intake power.

8. The vehicle drainage pipe detection method according to claim 4, characterized in that: The method further comprises: When the intake device start signal is obtained from the vehicle ECU, a pipeline detection instruction is generated; The intake power of the intake device is detected, and when the intake power exceeds a preset power threshold for the first time during a working task of the intake device, a pipeline detection instruction is generated.

9. The vehicle drainage pipe detection method according to claim 4, characterized in that: The method further comprises: Obtain rainfall detection data. When the rainfall detection data is greater than the preset rainfall threshold, generate a detection termination instruction and send it to the sealing component to seal the air intake pipe and the pipeline to be tested, and keep the pipeline to be tested unobstructed.

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