CN113895422B - Detection method and device for high-speed rail vehicle braking system - Google Patents
Detection method and device for high-speed rail vehicle braking system Download PDFInfo
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- CN113895422B CN113895422B CN202111345471.2A CN202111345471A CN113895422B CN 113895422 B CN113895422 B CN 113895422B CN 202111345471 A CN202111345471 A CN 202111345471A CN 113895422 B CN113895422 B CN 113895422B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
- B60T17/228—Devices for monitoring or checking brake systems; Signal devices for railway vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2250/00—Monitoring, detecting, estimating vehicle conditions
- B60T2250/02—Vehicle mass
Abstract
The invention provides a detection method and a device for a high-speed rail vehicle braking system, wherein the corresponding method comprises the following steps: determining the braking force required by the vehicle according to the vehicle weight and the deceleration curve; applying the braking force to the vehicle and sampling the pressure in a brake cylinder of the vehicle; and detecting the brake system of the vehicle according to the sampling result. Compared with the method in the prior art, the detection items of the detection method and the detection device for the high-speed railway vehicle braking system are more comprehensive and more accurate. And the detection and diagnosis work of the high-speed rail vehicle brake system function can be independently completed, manual detection and man-machine cooperative detection are not needed, the detection efficiency is effectively improved, and the labor cost is reduced.
Description
Technical Field
The invention relates to the technical field of brake testing of railway vehicles, in particular to a detection method and a detection device for a brake system of a high-speed railway vehicle.
Background
It is known that whether the performance of the brake system is normal or not is related to the safety of the vehicle, and before the vehicle runs, whether the brake system is normal or not needs to be confirmed. In the prior art, a train with the maximum running speed of 160km/h or less towed by an internal combustion locomotive or an electric locomotive is generally used for confirming the performance of a brake system in a manual mode, for example, a driver applies and releases a brake handle, and reads the reading of a train pipe and a brake cylinder pressure gauge to judge whether the application and the release of the brake are finished. The method can only qualitatively judge whether the application and release of the brake system are normal or not, and cannot automatically calculate the application and release time of the brake system, so that quantitative judgment cannot be realized.
On the other hand, the test conclusion comes from manual judgment, automatic recording cannot be achieved, and uncertain factors of manual misjudgment on results exist. The high-speed motor train unit is a train with the running speed of 300km/h or more, and the performance detection work of a brake system is carried out by adopting a menu guiding mode at present. According to the method, a driver is required to perform corresponding test operation according to the prompting content of the HMI, although the functions of automatic recording and the like are realized, man-machine cooperative detection is required, automatic detection cannot be achieved, and due to the limitation of ex-warehouse time, detection of key function items can only be completed. Meanwhile, the high-speed motor train unit braking system is complex in structure, related safety points of the braking system are more, and the manual detection method of the traditional locomotive and the man-machine cooperation method of the menu guide test cannot fully cover the related points of the braking system performance.
Therefore, how to improve the detection method of the brake system of the high-speed rail transit vehicle makes the detection method become a problem to be solved more comprehensively.
Disclosure of Invention
Aiming at the problems in the prior art, the detection method and the detection device for the high-speed railway vehicle braking system can independently complete the detection and diagnosis work of the high-speed railway vehicle braking system function, do not need manual detection and man-machine cooperative detection, effectively improve the detection efficiency and reduce the labor cost. And the detection items are more comprehensive compared with the method in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme:
in a first aspect, the present invention provides a method for detecting a brake system of a high-speed railway vehicle, including:
determining the braking force required by the vehicle according to the vehicle weight and the deceleration curve;
applying the braking force to the vehicle and sampling the pressure in a brake cylinder of the vehicle;
and detecting the brake system of the vehicle according to the sampling result.
In one embodiment, the determining the braking force required by the vehicle according to the vehicle weight and the deceleration curve comprises:
determining the weight of each compartment in the vehicle;
determining a deceleration value corresponding to each compartment according to the deceleration curve;
and determining the braking force according to the braking level of the vehicle, the weight of each compartment and the corresponding deceleration value of each compartment.
In one embodiment, the applying the braking force to the vehicle and sampling the pressure in the brake cylinder of the vehicle includes:
performing linear regression on at least two sampling points to generate a pressure curve;
and determining the pressure stabilization time of the brake cylinder according to the slope of the pressure curve.
In one embodiment, the detecting the braking system of the vehicle according to the sampling result comprises:
comparing the pressure stabilization time with a first preset value to generate a first comparison result;
determining pressure relieving time of a brake cylinder;
comparing the pressure relieving time with a second preset value to generate a second comparison result;
and determining a braking system detection result of the vehicle according to the first comparison result and the second comparison result.
In a second aspect, the present invention also provides a detection apparatus for a high speed rail vehicle braking system, the apparatus comprising:
the braking force determining module is used for determining the braking force required by the vehicle according to the vehicle weight and the deceleration curve of the vehicle;
the pressure sampling module is used for applying the braking force to the vehicle and sampling the pressure in a brake cylinder of the vehicle;
and the system detection module is used for detecting the brake system of the vehicle according to the sampling result.
In one embodiment, the braking force determination module includes:
a car weight determination unit for determining the weight of each car in the vehicle;
the compartment deceleration value determining unit is used for determining a deceleration value corresponding to each compartment according to the deceleration curve;
and the braking force determining unit is used for determining the braking force according to the braking level of the vehicle, the weight of each carriage and the deceleration value corresponding to each carriage.
In one embodiment, the pressure sampling module comprises:
the pressure curve generating unit is used for performing linear regression on at least two sampling points to generate a pressure curve;
and the stabilization time determining unit is used for determining the pressure stabilization time of the brake cylinder according to the slope of the pressure curve.
In one embodiment, the system detection module comprises:
the first result generating unit is used for comparing the pressure stabilizing time with a first preset value to generate a first comparison result;
the relieving time determining unit is used for determining the pressure relieving time of the brake cylinder;
the second result generation unit is used for comparing the pressure relieving time with a second preset value so as to generate a second comparison result;
and the detection result determining unit is used for determining the detection result of the braking system of the vehicle according to the first comparison result and the second comparison result.
In a third aspect, the present invention provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method for detecting a braking system of a high speed rail vehicle when executing the program.
In a fourth aspect, the present invention provides a computer readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for detecting a high speed rail vehicle braking system.
From the above description, the detection method and apparatus for the brake system of the high-speed rail vehicle provided by the embodiment of the invention firstly determine the braking force required by the vehicle according to the vehicle weight and the deceleration curve; then, applying a braking force to a brake cylinder of the vehicle, and sampling the pressure in the brake cylinder; and finally, detecting the brake system of the vehicle according to the sampling result. The invention has the advantages that after the automatic braking test time is set, the braking system detection command is automatically sent, the braking system control processor can independently complete the detection and diagnosis work of the braking system function, the manual detection and the man-machine cooperative detection are not needed, the detection efficiency is effectively improved, and the labor cost is reduced. The detection item points are more comprehensive compared with the previous method. Meanwhile, the detection result is completely calculated and recorded by the brake control unit, so that manual errors are avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for detecting a brake system of a high-speed rail vehicle according to an embodiment of the invention;
FIG. 2 is a flow chart illustrating step 100 according to an embodiment of the present invention;
FIG. 3 is a flowchart of step 200 in an embodiment of the present invention;
FIG. 4 is a flowchart illustrating step 300 according to an embodiment of the present invention;
FIG. 5 is an architectural diagram of a detection system for a high speed rail vehicle braking system in an exemplary embodiment of the present invention;
FIG. 6 is a schematic flow chart of a method for detecting a braking system of a high-speed rail vehicle according to an embodiment of the invention;
FIG. 7 is a block diagram of a detection device of a high speed rail vehicle braking system in an embodiment of the invention;
fig. 8 is a block diagram of the structure of the braking force determination module 10 in the embodiment of the invention;
FIG. 9 is a block diagram of a pressure sampling module 20 according to an embodiment of the present invention;
FIG. 10 is a block diagram of the system detection module 30 according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of an electronic device in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a specific implementation mode of a detection method of a high-speed railway vehicle braking system, and referring to fig. 1, the method specifically comprises the following steps:
step 100: and determining the braking force required by the vehicle according to the vehicle weight and the deceleration curve.
It will be appreciated that the deceleration curve is one of the brake effectiveness test indicators specified in the national standards GB-7258-87. The braking deceleration refers to the ability of the vehicle to rapidly reduce the running speed until the vehicle stops while running. And evaluating the most basic indexes of the braking performance of the automobile. The method comprises (1) braking the automobile at a certain initial speed until the automobile stops for a certain braking distance. (2) The vehicle is braked at a certain initial speed until the deceleration of the stop. (3) The heat fading resistance of the automobile during high-speed or long-slope continuous braking. The dynamic properties of automobiles are different, and the requirements for braking efficiency are also different. The demand for braking efficiency is also high for vehicles with high traveling speeds.
Step 200: applying the braking force to the vehicle and sampling the pressure in a brake cylinder of the vehicle;
specifically, the braking force of step 100 is applied to the full-train brake system, and a pressure stabilization point of a brake cylinder in the brake system is rapidly and accurately acquired on the basis of the braking force.
Step 300: and detecting the brake system of the vehicle according to the sampling result.
Firstly, a detection value of a detection parameter is generated according to a sampling result, and then the detection value is compared with a theoretical value of the detection value, so that whether a braking system of the vehicle is normal or not can be known. Preferably, the detection values include: a current brake application response time and a brake release time.
From the above description, the detection method of the brake system of the high-speed railway vehicle provided by the embodiment of the invention firstly determines the braking force required by the vehicle according to the vehicle weight and the deceleration curve; then, applying a braking force to a brake cylinder of the vehicle, and sampling the pressure in the brake cylinder; and finally, detecting the brake system of the vehicle according to the sampling result. The detection method of the high-speed rail vehicle brake system provided by the invention can independently complete the detection and diagnosis work of the high-speed rail vehicle brake system function, does not need manual detection and man-machine cooperative detection, effectively improves the detection efficiency and reduces the labor cost. And the detection items are more comprehensive compared with the method in the prior art.
In one embodiment, referring to fig. 2, step 100 comprises:
step 101: determining the weight of each compartment in the vehicle;
step 102: determining a deceleration value corresponding to each compartment according to the deceleration curve;
step 103: and determining the braking force according to the braking level of the vehicle, the weight of each compartment and the corresponding deceleration value of each compartment.
It should be noted that the whole vehicle corresponds to a deceleration curve, and the respective deceleration values of the non-connected cars can be respectively calculated according to the deceleration curve and the weight of each car, so as to further calculate the respective required braking force of each car. Specifically, the braking force required by the full-train applied preset-level braking is calculated according to the full-train weight and deceleration curve:
F Sum ＝∑M i *×A；
wherein short consist i =1-8; the double heading vehicle and the long marshalling i =1-16;17 grouping i =1-17, a represents the deceleration value corresponding to 7-stage braking when the vehicle is stationary, and M represents the vehicle weight;
in one embodiment, referring to fig. 3, step 200 comprises:
step 201: performing linear regression on at least two sampling points to generate a pressure curve;
step 202: and determining the pressure stabilization time of the brake cylinder according to the slope of the pressure curve.
In steps 201 and 202, the brake cylinder pressure is continuously sampled, 1 brake cylinder pressure point is collected at intervals of a plurality of sampling points, linear regression is performed after the plurality of sampling points are obtained by using the method, a straight line is fitted by using a least square method, and a straight line y = ax + b is calculated,
in the above formula: y is pressure, x is time; a is the slope of the fitted straight line, and b is the intercept of the straight line on the y axis; the curve is used to describe the pressure going from low to high to steady state. And calculating the brake cylinder rising slope a in real time, gradually reducing the rising amplitude of the brake cylinder pressure in unit time as the pressure rises to be close to a desired value, gradually reducing the fitted straight line slope a, and considering that the brake cylinder pressure reaches a stable state when a = 0. The corresponding time is the pressure stabilization time.
In one embodiment, referring to fig. 4, step 300 comprises:
step 301: comparing the pressure stabilization time with a first preset value to generate a first comparison result;
the time T for obtaining the rise of the current pressure from zero to stability can be calculated through the step 200, and the rise time T of the current brake cylinder pressure is obtained after the time T is multiplied by 80 percent 1 (pressure stabilization time), comparing the pressure stabilization time with a criterion value (first preset value), judging whether the brake application response time meets the requirement or not, namely whether the brake application function is qualified or not, and corresponding to the step 301, wherein the first comparison result is as follows: and when the difference value between the pressure stabilizing time and the first preset value is within a preset range, the first comparison result is qualified, otherwise, when the difference value between the pressure stabilizing time and the first preset value exceeds the preset range, the first comparison result is unqualified.
Step 302: determining pressure relieving time of a brake cylinder;
step 303: comparing the pressure relieving time with a second preset value to generate a second comparison result;
step 304: and determining a braking system detection result of the vehicle according to the first comparison result and the second comparison result.
In step 303 and step 304, the brake release time is counted from when the brake lever is at the release position to when the brake cylinder pressure is lower than 15kpa, and the time is calculated as the pressure release time of the brake cylinder pressure. And comparing the pressure relief time with a criterion value (a second preset value), similarly, when the difference value between the pressure relief time and the second preset value is within a preset range, judging that the brake relief response time meets the requirement, and the brake relief function is qualified, namely the second comparison result is qualified, otherwise, when the difference value between the pressure relief time and the second preset value is beyond the preset range, considering that the second comparison result is unqualified.
It is understood that, in step 304, the brake system detection result of the vehicle is qualified only when the first comparison result and the second comparison result are both qualified, and the brake system detection result of the vehicle is not qualified when either one of the first comparison result and the second comparison result is not qualified, or both of the first comparison result and the second comparison result are not qualified.
In order to further explain the scheme, the invention also provides a specific application example of the detection method of the high-speed railway vehicle braking system.
In a specific application example of the invention, a detection system of a high-speed rail vehicle brake system is further provided, in order to realize the unmanned operation of the detection function of the brake system, the brake system needs to simulate all the manual operations in the detection process, so as to realize the automation of the system detection, and the following work needs to be carried out in advance:
1, confirming and automatically adjusting the working condition of a brake system before detection:
before the brake system detects, the total wind pressure of the vehicle is ensured to be more than 8bar, and the brake is kept in a release state. Therefore, the brake system needs to confirm whether the vehicle working condition meets the detection requirement before the formal test, if so, the detection link is formally entered, and if not, the vehicle condition needs to be actively adjusted, so that the full-train holding brake is relieved by receiving the holding brake relieving instruction sent by the CCU. Whether the total wind pressure meets the detection condition is judged by detecting the average total wind pressure of the whole row, if not, the whole row of air compressors are started, and the total wind pressure is quickly met to the requirement of the detection working condition.
2, automatic connection of various sub-tests in the detection of the braking system:
after each sub-test is finished, the brake system automatically starts the next sub-test to realize the sequential and orderly execution of the sub-tests. And meanwhile, recording the detection result of each sub-test, and reporting the final detection result to the CCU and displaying the final detection result on the HMI after the last sub-test is finished.
3, automatic detection of the direct braking test:
the straight-through brake test mainly aims at detecting whether the brake application and release are normal or not, and in order to realize the purpose of unmanned operation, a brake system automatically triggers the functions of applying and releasing the maximum service brake to replace the process of operating a handle by a driver so as to finish automatic detection;
4, automatic detection of an air compressor:
the main content of the air compressor detection is to detect the blowing capacity of the air compressor in unit time, a complete process that the total air pressure is from low to high needs to be recorded, and the total air pressure needs to be automatically reduced to be less than 9bar in order to realize the automatic detection of the process. To achieve this, the braking system needs to have the function of automatically adjusting the total wind pressure value. The method comprises the steps of automatically applying and relieving the maximum service brake to realize the rapid reduction of the total wind pressure, stopping applying and relieving the maximum service brake after detecting that the total wind pressure meets the test requirement of the air compressor, and keeping the brake state in a relieved state.
5 automatic disconnection of Emergency brake EB Loop
In the emergency brake EB test, an emergency brake EB loop needs to be disconnected, and in the conventional detection, a handle needs to be manually operated to an emergency brake EB position to apply the emergency brake EB. In automatic brake detection, a brake system triggers a train to disconnect an emergency brake EB loop by actively disconnecting a parking monitoring loop (PBML), so that the detection requirement is met.
6 automatic disconnection of emergency braking UB loop
The test of the EB to UB emergency braking needs to disconnect the UB loop, after the EB loop is disconnected, the braking system controls the EB to UB relay to output a control signal, the UB loop is automatically disconnected, and the detection requirement is met.
The brake system of the high-speed motor train unit is complex in function, in order to achieve comprehensive coverage of function detection, automatic detection comprises detection of functions of a through brake function, an emergency brake EB, an emergency brake UB, an air compressor, a total air through loop, an anti-skid loop, a parking brake loop, a brake keeping loop, a parking monitoring loop and the like, meanwhile, communication functions of network communication, CAN communication and the like are detected, and detection items are comprehensive and complete.
Referring to fig. 5, the detection system of the high-speed railway vehicle brake system includes: automatic braking detects train management and control module, automatic braking detects network segment management and control module, automatic braking and detects bicycle management and control module and automatic braking and detect the execution module, specifically:
automatic braking detects train management and control module: the module has a train management function and is realized by a train brake manager TBM. After receiving a braking detection instruction of the CCU, the TBM automatically starts to detect the braking function of the whole train, and after the detection is finished, a test result is reported to the CCU and is displayed on the HMI; when the system detection is carried out on the brake system, the TBM is used for unified scheduling management, and meanwhile, the detection results are summarized.
Automatic braking detection network segment management: the module has a vehicle network segment management function and is realized by a segment brake manager SBM. After receiving an automatic braking detection instruction sent by the TBM, the SBM starts the braking detection management function of the network segment, sends the content of the test instruction to a single vehicle for execution, and summarizes and reports the test result reported by the single vehicle in the network segment to the TBM.
The automatic braking detection bicycle management and control module: the brake control unit LBCU is responsible for controlling the EP valve of the vehicle to apply and relieve the brake, controlling the local air compressor to start and close, disconnecting the PBML loop of the vehicle, disconnecting the EB loop and the UB loop of the vehicle and controlling the antiskid valve action of the vehicle. And collecting a total air pressure value, an R pressure value, a parking pressure value, a brake cylinder pressure value and a pre-control pressure value of the vehicle, and calculating the response time of the related components. Reporting the final detection result of the vehicle to the SBM;
automatic braking detection actuating mechanism: the pneumatic valve, the relay and the acquisition equipment are responsible for responding to the control of the brake system and carrying out related operations of control and detection.
Based on the detection system of the high-speed railway vehicle brake system, the detection method of the high-speed railway vehicle brake system provided by the specific application example of the invention specifically comprises the following contents, and refer to fig. 6.
S1: and after receiving the automatic braking detection instruction, the braking system starts to carry out the detection work of the braking systems of all the rows.
After the HMI sets the automatic detection time, the relevant technicians can leave the vehicle. The CCU sends a brake system detection instruction to the brake system according to the automatic detection time set by the driver; in addition, the vehicle operating conditions are required to be confirmed, including parking application, no emergency braking request, driver handle in a release position, brake release maintaining, PBML, EB and UB loops are not bypassed, and the total wind pressure meets the requirements. And if the total air pressure does not meet the requirement, all air compressors are started to quickly charge air to the train, so that the test preparation time is shortened.
S2: and applying and relieving 7-level braking, calculating the time for applying and relieving the braking by adopting an accurate and quick algorithm, and detecting whether the braking is applied or relieved.
Specifically, the TBM calculates the braking force required for applying 7-stage braking for the full train according to the full train weight and deceleration curve:
F Sum ＝∑M i *×A；
wherein the short grouping i =1-8, the double-heading, long grouping i =1-16,17 grouping i =1-17,
a represents the deceleration value corresponding to 7-stage braking when the vehicle is stationary, and M represents the vehicle weight;
the TBM issues the total braking force demand to a full-row braking system, and the braking system rapidly responds and applies 7-level braking; the brake system needs to calculate the pressure rise time, and the currently adopted strategy is that 80% of the time required for the brake cylinder pressure to rise from zero to a pressure stable value is taken as the rise time of the brake cylinder pressure.
T 1 ＝T*×80％
The key for smoothly completing the test is to rapidly and accurately obtain the pressure stabilization point. The currently employed methods are as follows: continuously sampling the pressure of the brake cylinder, acquiring 1 pressure point of the brake cylinder at intervals of 3 sampling points, performing linear regression after 5 sampling points are obtained by using the method, performing linear fitting by using a least square method, and calculating direct y = ax + b, wherein,
and calculating the brake cylinder rising slope a in real time, wherein the rising amplitude of the brake cylinder pressure in unit time gradually decreases as the pressure rises to be close to a desired value, the fitted straight line slope a also gradually decreases, and when a =0, the brake cylinder pressure is considered to be in a stable state. At this time, the time corresponding to the 3 rd point in the 5 brake cylinder pressure sampling points is the pressure stabilizing time. The time T from zero rising to stabilization of the current pressure can be obtained through calculation, and the rising time T of the current brake cylinder pressure is obtained after the rising time T is multiplied by 80 percent 1 And comparing the brake application response time with a criterion value to judge whether the brake application response time meets the requirement or not and whether the brake application function is qualified or not.
The brake release time is counted from the moment the brake lever is at the release position to the moment the brake cylinder pressure is below 15kpa, and the time is counted as the release time of the brake cylinder pressure. And comparing the brake release response time with a criterion value, and judging whether the brake release response time meets the requirement or not and whether the brake release function is qualified or not.
S3: starting a first air compressor, and checking the blowing capacity of the air compressor and the connectivity of a main air pipe;
the TBM sends a start air compressor command to the relevant LBCU. The short marshalling starts the first network segment air compressor, and the long marshalling or reconnection vehicle starts the first and second network segment air compressors. Because each equipment of the vehicle is in a wind using state, the possibility of the reduction of the total wind of the vehicle in the early stage of the wind blowing of the air compressor exists, and the calculation of the wind blowing capacity of the air compressor in unit time is influenced. Therefore, the lowest value of the total air pressure after the air compressor is started needs to be used as a pressure starting point for calculating the capacity of the air compressor. When the air compressor stops blowing air, the total air pressure is reduced, the total air pressure reduction states of all the vehicles are inconsistent because the blowing point is located at the end vehicle, the highest point of the total air pressure of each vehicle is calculated by each vehicle at the moment to serve as a pressure termination point, the blowing capacity of the air compressor in unit time is further calculated, and whether the total air pressure of the whole row of air compressors can be improved or not is verified at the same time, so that whether the through performance of the whole row of total air pipes is normal or not is verified.
S4: carrying out an anti-skid test;
s5: starting a second air compressor, and checking the blowing capacity of the air compressor and the connectivity of a main air pipe;
s6: performing a PBML test, disconnecting the PBML loop and judging whether the function is normal;
the high-speed motor train unit adopts a fault-oriented safety control mechanism, if the speed of the vehicle is increased when parking brake is applied, the PBML loop is disconnected from a brake system, the EBL loop is disconnected due to the disconnection of the PBML loop, and the vehicle is applied with emergency brake EB for parking, so that the occurrence of wheel rubbing fault is avoided. The PBML loop is disconnected to automatically trigger the brake system according to the working condition of the vehicle, and the function cannot be realized by the operation of a driver, so the original menu-guided brake test does not have the PBML test function. In the automatic detection method of the brake system, the test content is added, so that the detection item is more complete. The method comprises the steps that the TBM automatically issues a PBML disconnection command to an LBCU with a PBML circuit disconnection function, the full-row BCUs read back the PBML circuit state to confirm that a vehicle is disconnected, meanwhile, whether EB is normally applied or not is judged through the next EB test, and finally, complete diagnosis is carried out on the PBML circuit disconnection promotion EB braking.
S7: performing EB test, judging whether EB is applied normally, and disconnecting UB loop;
s8: carrying out UB test to judge whether UB is applied normally;
s9: and summarizing test results, finishing automatic detection, summarizing final results and reporting to the HMI.
Based on the same inventive concept, the embodiment of the present application further provides a detection device of a high-speed rail vehicle braking system, which can be used for implementing the method described in the above embodiment, such as the following embodiments. The principle of solving the problems of the detection device of the high-speed rail vehicle braking system is similar to that of the detection method of the high-speed rail vehicle braking system, so the implementation of the detection device of the high-speed rail vehicle braking system can be implemented by referring to the implementation of the detection method of the high-speed rail vehicle braking system, and repeated parts are not described again. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. While the system described in the embodiments below is preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.
An embodiment of the present invention provides a specific implementation manner of a detection apparatus for a braking system of a high-speed rail vehicle, which is capable of implementing a detection method for a braking system of a high-speed rail vehicle, and referring to fig. 7, the detection apparatus for a braking system of a high-speed rail vehicle specifically includes the following contents:
the braking force determining module 10 is used for determining the braking force required by the vehicle according to the vehicle weight and the deceleration curve;
the pressure sampling module 20 is used for applying the braking force to the vehicle and sampling the pressure in a brake cylinder of the vehicle;
and the system detection module 30 is used for detecting the brake system of the vehicle according to the sampling result.
In one embodiment, referring to fig. 8, the braking force determination module 10 includes:
a car weight determination unit 101 for determining the weight of each car in the vehicle;
the car deceleration value determining unit 102 is used for determining a deceleration value corresponding to each car according to the deceleration curve;
a braking force determination unit 103, configured to determine the braking force according to a braking level of the vehicle, the weight of each car, and a deceleration value corresponding to each car.
In one embodiment, referring to fig. 9, the pressure sampling module 20 includes:
a pressure curve generating unit 201, configured to perform linear regression on at least two sampling points to generate a pressure curve;
a stabilization time determining unit 202, configured to determine a pressure stabilization time of the brake cylinder according to a slope of a pressure curve.
In one embodiment, referring to fig. 10, the system detection module 30 includes:
a first result generating unit 301, configured to compare the pressure stabilization time with a first preset value to generate a first comparison result;
a release time determination unit 302 for determining a pressure release time of a brake cylinder;
a second result generating unit 303, configured to compare the pressure relief time with a second preset value, so as to generate a second comparison result;
a detection result determining unit 304, configured to determine a braking system detection result of the vehicle according to the first comparison result and the second comparison result.
As can be seen from the above description, the detection device of the brake system of the high-speed rail vehicle provided by the embodiment of the invention firstly determines the braking force required by the vehicle according to the vehicle weight and the deceleration curve; then, applying a braking force to a brake cylinder of the vehicle, and sampling the pressure in the brake cylinder; and finally, detecting the brake system of the vehicle according to the sampling result. The detection method and the detection device for the high-speed rail vehicle brake system can independently complete the detection and diagnosis work of the high-speed rail vehicle brake system function, do not need manual detection and man-machine cooperative detection, effectively improve the detection efficiency and reduce the labor cost. And the detection items are more comprehensive compared with the method in the prior art.
The apparatuses, modules or units illustrated in the above embodiments may be specifically implemented by a computer chip or an entity, or implemented by a product with certain functions. A typical implementation device is an electronic device, which may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
In a typical example, the electronic device specifically includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the program, the steps of the detection method of the high-speed rail vehicle brake system are implemented, the steps include:
step 100: determining the braking force required by the vehicle according to the vehicle weight and the deceleration curve;
step 200: applying the braking force to a vehicle and sampling the pressure in a brake cylinder of the vehicle;
step 300: and detecting the brake system of the vehicle according to the sampling result.
Referring now to FIG. 11, shown is a schematic diagram of an electronic device 600 suitable for use in implementing embodiments of the present application.
As shown in fig. 11, the electronic apparatus 600 includes a Central Processing Unit (CPU) 601 that can perform various appropriate works and processes according to a program stored in a Read Only Memory (ROM) 602 or a program loaded from a storage section 608 into a Random Access Memory (RAM)) 603. In the RAM603, various programs and data necessary for the operation of the system 600 are also stored. The CPU601, ROM602, and RAM603 are connected to each other via a bus 604. An input/output (I/O) interface 605 is also connected to bus 604.
The following components are connected to the I/O interface 605: an input portion 606 including a keyboard, a mouse, and the like; an output portion 607 including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker; a storage section 608 including a hard disk and the like; and a communication section 609 including a network interface card such as a LAN card, a modem, or the like. The communication section 609 performs communication processing via a network such as the internet. A driver 610 is also connected to the I/O interface 605 as needed. A removable medium 611 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 610 as necessary, so that the computer program read out therefrom is mounted as necessary in the storage section 608.
In particular, according to an embodiment of the present invention, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, an embodiment of the present invention includes a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the above-described method for detecting a high-speed rail vehicle braking system, the steps including:
step 100: determining the braking force required by the vehicle according to the vehicle weight and the deceleration curve;
step 200: applying the braking force to a vehicle and sampling the pressure in a brake cylinder of the vehicle;
step 300: and detecting the brake system of the vehicle according to the sampling result.
In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 609, and/or installed from the removable medium 611.
Computer-readable media, including both permanent and non-permanent, removable and non-removable media, may implement the information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Disks (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one of 8230, and" comprising 8230does not exclude the presence of additional like elements in the process, method, article, or apparatus comprising the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims (10)
1. A method for detecting a brake system of a high-speed railway vehicle is characterized by comprising the following steps:
determining the braking force required by the vehicle according to the vehicle weight and the deceleration curve;
applying the braking force to a vehicle and sampling the pressure in a brake cylinder of the vehicle;
detecting a braking system of the vehicle according to the sampling result;
the step of determining the braking force required by the vehicle according to the vehicle weight and the deceleration curve comprises the following steps: calculating the braking force required by the braking applied to the whole train according to the curve of the weight and the deceleration of the whole train;
the detection method of the high-speed railway vehicle braking system further comprises the following steps:
acquiring a pressure stabilization point;
performing an EB loop test for breaking the emergency brake by a PBML loop breaking mode;
the acquiring of the pressure stabilization point includes:
continuously sampling the pressure of the brake cylinder, acquiring 1 pressure point of the brake cylinder at intervals of 3 sampling points, performing linear regression after 5 sampling points are obtained by using the method, performing linear fitting by using a least square method, and calculating direct y = ax + b, wherein,
calculating the rising slope a of the brake cylinder in real time, wherein the rising amplitude of the brake cylinder pressure in unit time is gradually reduced along with the rise of the pressure to be close to an expected value, the slope a of the fitted straight line is also gradually reduced, and when a =0, the brake cylinder pressure is considered to be in a stable state; at the moment, the time corresponding to the 3 rd point in the 5 brake cylinder pressure sampling points is the pressure stabilization time; the time T from zero to stable rise of the current pressure can be obtained through calculation, and the rise time T of the current brake cylinder pressure is obtained after the time T is multiplied by 80 percent 1 Comparing the brake application response time with a criterion value, and judging whether the brake application response time meets the requirement or not and whether the brake application function is qualified or not;
the brake release time is counted from the moment that the brake handle is located at the release position to the moment that the pressure of the brake cylinder is lower than 15kpa, and the time is calculated as the release time of the pressure of the brake cylinder; comparing the brake release response time with a criterion value, and judging whether the brake release response time meets the requirement or not and whether the brake release function is qualified or not;
the method for testing the disconnection emergency braking EB loop by the way of disconnecting the PBML loop comprises the following steps:
and the LBCU issues a PBML disconnection instruction, the full-column BCUs read back the PBML loop state to confirm that the vehicle is disconnected, and meanwhile, whether the EB is normally applied or not is judged through the next EB test, and finally, complete diagnosis is carried out on the PBML loop disconnection promotion EB braking.
2. The method for detecting the braking system of the high-speed railway vehicle as claimed in claim 1, wherein the step of determining the braking force required by the vehicle according to the vehicle weight and the deceleration curve comprises the following steps:
determining the weight of each compartment in the vehicle;
determining a deceleration value corresponding to each compartment according to the deceleration curve;
and determining the braking force according to the braking level of the vehicle, the weight of each compartment and the corresponding deceleration value of each compartment.
3. The method for detecting a brake system of a high-speed railway vehicle according to claim 1, wherein the applying the braking force to the vehicle and sampling the pressure in a brake cylinder of the vehicle comprises:
performing linear regression on at least two sampling points to generate a pressure curve;
and determining the pressure stabilization time of the brake cylinder according to the slope of the pressure curve.
4. The method for detecting the brake system of the high-speed railway vehicle according to the sampling result is characterized by comprising the following steps of:
comparing the pressure stabilization time with a first preset value to generate a first comparison result;
determining pressure relieving time of a brake cylinder;
comparing the pressure relieving time with a second preset value to generate a second comparison result;
and determining a braking system detection result of the vehicle according to the first comparison result and the second comparison result.
5. A detection apparatus for a high speed rail vehicle braking system, comprising:
the braking force determining module is used for determining the braking force required by the vehicle according to the vehicle weight and the deceleration curve of the vehicle;
the pressure sampling module is used for applying the braking force to the vehicle and sampling the pressure in a brake cylinder of the vehicle;
the system detection module is used for detecting a brake system of the vehicle according to the sampling result;
the step of determining the braking force required by the vehicle according to the vehicle weight and the deceleration curve comprises the following steps: calculating the braking force required by the braking applied to the whole train according to the curve of the weight and the deceleration of the whole train;
the detection method of the high-speed railway vehicle braking system further comprises the following steps:
acquiring a pressure stabilization point;
performing an EB loop test for breaking the emergency brake by a PBML loop breaking mode;
the acquiring of the pressure stabilization point includes:
continuously sampling the pressure of the brake cylinder, acquiring 1 pressure point of the brake cylinder at intervals of 3 sampling points, performing linear regression after 5 sampling points are obtained by using the method, performing linear fitting by using a least square method, and calculating direct y = ax + b, wherein,
calculating the rising slope a of the brake cylinder in real time, gradually reducing the rising amplitude of the brake cylinder pressure in unit time along with the pressure rising to be close to a desired value, gradually reducing the slope a of a fitted straight line, and when a =0, considering that the brake cylinder pressure reaches a stable state; at the moment, the time corresponding to the 3 rd point in the 5 brake cylinder pressure sampling points is the pressure stabilization time; the time T from zero rising to stabilization of the current pressure can be obtained through calculation, and the rising time T of the current brake cylinder pressure is obtained after the rising time T is multiplied by 80 percent 1 Comparing the brake application response time with a criterion value, and judging whether the brake application response time meets the requirement or not and whether the brake application function is qualified or not;
the brake release time is counted from the moment that the brake handle is located at the release position to the moment that the pressure of the brake cylinder is lower than 15kpa, and the time is calculated as the release time of the pressure of the brake cylinder; comparing the brake release response time with a criterion value, and judging whether the brake release response time meets the requirement or not and whether the brake release function is qualified or not;
the method for testing the disconnection emergency braking EB loop by the way of disconnecting the PBML loop comprises the following steps:
and the LBCU issues a PBML disconnection command, the full-row BCUs read back the state of the PBML loop to confirm that the vehicle is disconnected, and meanwhile, whether the EB is normally applied or not is judged through the next EB test, and finally, a complete diagnosis is carried out on the PBML loop disconnection promotion EB braking.
6. The detection apparatus of a high speed railway vehicle braking system as claimed in claim 5, wherein the braking force determination module comprises:
a car weight determination unit for determining the weight of each car in the vehicle;
the compartment deceleration value determining unit is used for determining a deceleration value corresponding to each compartment according to the deceleration curve;
and the braking force determining unit is used for determining the braking force according to the braking level of the vehicle, the weight of each carriage and the deceleration value corresponding to each carriage.
7. The apparatus for detecting a braking system of a high speed railway vehicle of claim 5, wherein the pressure sampling module comprises:
the pressure curve generating unit is used for performing linear regression on at least two sampling points to generate a pressure curve;
and the stabilization time determining unit is used for determining the pressure stabilization time of the brake cylinder according to the slope of the pressure curve.
8. The apparatus for detecting a braking system of a high speed railway vehicle according to claim 7, wherein the system detection module comprises:
the first result generating unit is used for comparing the pressure stabilizing time with a first preset value to generate a first comparison result;
the release time determining unit is used for determining the pressure release time of the brake cylinder;
the second result generation unit is used for comparing the pressure relieving time with a second preset value so as to generate a second comparison result;
and the detection result determining unit is used for determining the detection result of the braking system of the vehicle according to the first comparison result and the second comparison result.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of the method for detecting a brake system of a high speed rail vehicle as claimed in any one of claims 1 to 4.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for detecting a braking system of a high-speed rail vehicle according to any one of claims 1 to 4.
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| CN102627105B (en) * | 2012-04-13 | 2015-09-23 | 深圳市远望谷信息技术股份有限公司 | A kind of method of inspection of rail vehicle brake-pressure state and device |
| CN106740798A (en) * | 2016-11-24 | 2017-05-31 | 郑州智辆电子科技有限公司 | Locomotive brake on-line monitoring system |
| CN109131287B (en) * | 2018-08-22 | 2020-10-20 | 中车株洲电力机车有限公司 | Method, system and equipment for realizing impact limitation of brake system |
| CN112141069B (en) * | 2020-09-10 | 2022-06-28 | 中车长春轨道客车股份有限公司 | Health management system of braking and air supply system for motor train unit |
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