CN113371032A - Device and method for identifying faults of metro vehicle suspension system - Google Patents
Device and method for identifying faults of metro vehicle suspension system Download PDFInfo
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- CN113371032A CN113371032A CN202110643664.XA CN202110643664A CN113371032A CN 113371032 A CN113371032 A CN 113371032A CN 202110643664 A CN202110643664 A CN 202110643664A CN 113371032 A CN113371032 A CN 113371032A
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- 230000002159 abnormal effect Effects 0.000 claims abstract description 28
- 238000012544 monitoring process Methods 0.000 claims abstract description 17
- 238000007619 statistical method Methods 0.000 claims description 7
- 230000005856 abnormality Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
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- 230000009286 beneficial effect Effects 0.000 abstract description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0081—On-board diagnosis or maintenance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
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Abstract
The invention relates to a device and a method for identifying faults of a suspension system of a metro vehicle, and belongs to the technical field of metro vehicle fault identification. The fault identification device comprises an acceleration sensor arranged at each carriage of the subway vehicle, a load sensor arranged at the bottom of each carriage of the subway vehicle and an alarm system. The fault identification method comprises the steps of monitoring the acceleration and the load of each carriage of the subway vehicle in real time, and transmitting the measured data to a data processor; the data processor identifies and processes the acquired acceleration data and the acquired load data, and analyzes the acceleration data and the load data to obtain a carriage with abnormal acceleration; when the compartment with abnormal acceleration occurs, the data processor sends an instruction to the electric control module, and the electric control module controls the corresponding alarm to perform fault early warning. The invention can identify the early fault of the suspension system of the metro vehicle and timely overhaul, thereby being beneficial to increasing the riding comfort of passengers and improving the driving safety.
Description
Technical Field
The invention relates to a device and a method for identifying faults of a suspension system of a metro vehicle, and belongs to the technical field of metro vehicle fault identification.
Background
The suspension system of the subway vehicle plays an important role in ensuring the riding comfort of passengers, and when the suspension system has problems, the following faults are generated: (1) when the subway runs on an uneven track, the subway shakes seriously and loses the buffer force, and the vehicles have the feeling of scattering at the same time; (2) the vehicle can make 'rattle and rattle' when being pressed by force, and the sound of the vehicle passing through a plurality of bumpy roads can be louder; (3) the 'nodding' condition of the subway is aggravated when the subway brakes, and the side inclination is more serious when the subway turns. Therefore, when a suspension system of the metro vehicle breaks down, the riding comfort of passengers can be greatly influenced, and when the failure is serious, the life safety can be even influenced, and huge property loss is caused.
Disclosure of Invention
The invention aims to provide a device and a method for identifying faults of a suspension system of a metro vehicle, aiming at the problem that the riding comfort of passengers is greatly influenced when the suspension system of the metro vehicle breaks down, so that the faults of the suspension system of the metro vehicle can be effectively identified in time at the early stage, and intervention measures are taken, thereby reducing risks and ensuring the riding experience of the passengers.
The purpose of the invention is realized by the following technical scheme:
the device for recognizing the faults of the suspension system of the metro vehicle comprises an acceleration sensor, a load sensor and an alarm system; wherein:
the acceleration sensors are respectively arranged at each carriage of the subway vehicle and used for measuring the acceleration of the subway vehicle;
the load sensor is arranged at the bottom of each carriage of the subway vehicle and is used for monitoring the load condition of the subway vehicle;
the alarm system is arranged in the cab and comprises a data processor, an electric control module and an alarm which are sequentially connected, and the acceleration sensor and the load sensor are connected to the input end of the data processor; the data processor is used for receiving and identifying data information acquired by each acceleration sensor and each load sensor and sending an instruction to the electronic control module, and the electronic control module is used for controlling the alarm to carry out fault early warning.
Further, the acceleration sensor is a three-axis acceleration sensor.
Furthermore, the number of the alarms is n, and the alarms correspond to n carriages of the subway vehicle respectively.
A method for identifying faults of a metro vehicle suspension system based on a metro vehicle suspension system fault identification device comprises the following steps:
the acceleration sensor and the load sensor respectively monitor the acceleration and the load of each carriage of the subway vehicle in real time and transmit the measured data to the data processor in real time;
the data processor carries out identification processing to the acceleration data and the load data collected, analyzes to obtain the carriage with abnormal acceleration, and comprises the following components:
when the load of each compartment is the same and the acceleration of one or more compartments deviates from the acceleration of other compartments, the acceleration of one or more compartments is abnormal;
when the loads of all the carriages are different, determining the relationship between the theoretical acceleration and the loads by using a statistical method, calculating the theoretical acceleration of each carriage according to the load of each carriage, and judging whether the actual acceleration is abnormal or not according to the difference value of the theoretical acceleration and the actual acceleration;
when the compartment with abnormal acceleration occurs, the data processor sends an instruction to the electric control module, and the electric control module controls the corresponding alarm to perform fault early warning.
Further, the method for determining the relationship between the theoretical acceleration and the load is as follows:
ensuring that a metro vehicle suspension system has no abnormal condition or fault, and simultaneously installing a metro vehicle suspension system fault recognition device;
setting a monitoring period, and continuously monitoring the measurement data of the acceleration sensor and the load sensor of the subway vehicle in the monitoring period;
and carrying out statistical analysis on the collected acceleration data and the collected load data so as to determine the relation between the theoretical acceleration and the load.
Further, numbering each carriage of the subway vehicle, wherein the number i is 1,2,3,4,5 … n, and n is a positive integer; in the actual operation of the subway vehicle, the relation between the theoretical acceleration and the load is as follows:
Ai＝F(m1,mi)×a1
wherein, a1The actual acceleration of the car numbered 1 as a reference; m is1The load of the carriage with the number of 1 is obtained; a. theiTheoretical acceleration of a car numbered i, miThe load of the car numbered i, F (m)1,mi) About the load miAs a function of (c).
Further, the method for determining whether the acceleration is abnormal is as follows:
the actual acceleration of the compartment with the number i measured by the acceleration sensor is aiThe test constant is epsilon:
if | Ai-aiIf | < ε, then aiAbsence of anomalies;
if | Ai-aiIf | ≧ epsilon, then aiPresence of an anomaly, numbered asi, the suspension system of the carriage of the vehicle has the possibility of failure, and the alarm gives a failure alarm.
Further, when judging whether the acceleration is abnormal or not, if the compartment with more than n/2 sections has | Ai-aiIf the [ epsilon ] is more than or equal to the [ epsilon ], the suspension system of the acceleration carriage serving as the reference has the possibility of failure, and the alarm gives a failure alarm; and simultaneously re-determining the theoretical acceleration of each compartment:
Ai＝F(m2,mi)×a2
wherein, a2The actual acceleration of the car numbered 2 as a reference; m is2The load of the carriage with the number of 2 is obtained; a. theiTheoretical acceleration of a car numbered i, miThe load of the car numbered i, F (m)2,mi) About the load miA function of (a);
compare | A againi-aiDetermining the actual acceleration a of each compartment by the magnitude of |, and ∈ |iWhether an exception exists.
Further, the monitoring period is 20-45 days.
Further, when the metro vehicle is in a horizontal straight line driving stage, the suspension system fault recognition device is operated.
The invention has the beneficial effects that:
the method can identify the faults of the suspension system of the subway vehicle as early as possible in the operation process of the subway. Through discerning the early fault of railcar suspension system to timely maintenance is favorable to reducing the vehicle and takes place excessive phenomenon such as "nod", "new head", heeling, helps increasing passenger's riding comfort and improves driving safety.
Drawings
Fig. 1 is a schematic structural diagram of a fault identification device for a suspension system of a metro vehicle;
wherein, 1-acceleration sensor, 2-load sensor, 3-alarm system;
FIG. 2 is a schematic view of the working principle of the fault recognition device for the suspension system of the metro vehicle;
FIG. 3 is a schematic flow chart of a method for identifying a failure of a suspension system of a metro vehicle;
fig. 4 is a schematic flow chart of identifying, processing and analyzing the acquired data by the data processor to determine whether the acceleration is abnormal when the loads of the cars are different.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a device for identifying faults of a suspension system of a metro vehicle, which comprises an acceleration sensor, a load sensor and an alarm system, and is shown in figure 1.
The acceleration sensors 1 are respectively installed at each carriage of the subway vehicle and used for measuring the acceleration of the subway vehicle. As an alternative embodiment, the acceleration sensor 1 is a triaxial acceleration sensor, and is respectively installed at the same position of each carriage of the subway vehicle, and is used for measuring triaxial acceleration of each carriage.
When the subway runs in a horizontal straight line, the transverse acceleration and the vertical acceleration of any carriage are both 0, and the characteristic is applied to distinguish the motion condition of the subway, so that the horizontal straight line motion stage can be identified. When the subway runs in a horizontal straight line, the suspension system fault recognition device starts to operate; when any carriage of the subway is in a non-horizontal linear motion stage, the suspension system fault identification device stops working. When the subway is started to accelerate or is decelerated at an arrival, if a suspension system of one car fails, the three-axis acceleration of the car is abnormal with respect to the other cars. Therefore, whether the suspension system breaks down or not can be judged according to whether the acceleration of a certain section of carriage of the subway vehicle is abnormal or not.
And the load sensor 2 is arranged at the bottom of each carriage of the subway vehicle and is used for monitoring the load condition of the subway vehicle in real time.
The alarm system 3 is arranged in a cab and gives an alarm when a fault of a suspension system of the subway vehicle is detected. As shown in fig. 2, the alarm system comprises a data processor, an electronic control module and an alarm which are electrically connected in sequence, wherein the acceleration sensor 1 and the load sensor 2 are both electrically connected to an input end of the data processor; the data processor is used for receiving and identifying data information acquired by the acceleration sensors 1 and the load sensors 2 and sending instructions to the electronic control module, and the electronic control module is used for controlling the alarm to carry out fault early warning.
As an alternative embodiment, n sirens are provided, which correspond to n carriages of the subway vehicle respectively. Each carriage of the subway vehicle is numbered, the number i is 1,2,3,4,5 … n, n is a positive integer, and each carriage has a fixed number. For example, when the suspension system of the No. 1 carriage has a fault, the No. 1 alarm gives an alarm.
A method for identifying a suspension system fault based on a subway vehicle suspension system fault identification device comprises the following steps, as shown in FIG. 3:
the acceleration sensor and the load sensor respectively monitor the acceleration and the load of each carriage of the subway vehicle in real time and transmit the measured data to the data processor in real time;
the data processor identifies and processes the acquired acceleration data and the acquired load data, and analyzes to obtain a carriage with abnormal acceleration: if the loads of the carriages are the same, the acceleration of one or more carriages deviates from the acceleration of other carriages, or the acceleration of one or more carriages is obviously different from the acceleration of other carriages, the acceleration of one or more carriages is abnormal, and the corresponding suspension system is likely to be in failure;
when the compartment with abnormal acceleration occurs, the data processor sends an instruction to the electric control module, and the electric control module controls the corresponding alarm to perform fault early warning and remind technicians to timely overhaul the compartment suspension system with faults.
As another embodiment, the method for identifying the suspension system fault based on the subway vehicle suspension system fault identification device comprises the following steps,
the acceleration sensor and the load sensor respectively monitor the acceleration and the load of each carriage of the subway vehicle in real time and transmit the measured data to the data processor in real time;
the data processor identifies and processes the acquired acceleration data and the acquired load data, and analyzes to obtain a carriage with abnormal acceleration: if the loads of all the carriages are different, determining the relationship between the theoretical acceleration and the loads by using a statistical method, calculating the theoretical acceleration of each carriage according to the load of each carriage, and determining whether the actual acceleration is abnormal according to the difference value of the theoretical acceleration and the actual acceleration;
when the compartment with abnormal acceleration occurs, the data processor sends an instruction to the electric control module, and the electric control module controls the corresponding alarm to perform fault early warning and remind technicians to timely overhaul the compartment suspension system with faults.
As an alternative embodiment, in the actual operation of the metro vehicle, the method for determining the relationship between the theoretical acceleration and the load is as follows:
carefully checking the whole suspension system of the metro vehicle to ensure that the suspension system of the metro vehicle has no abnormality or faults, and meanwhile, installing a fault recognition device of the suspension system of the metro vehicle;
setting a monitoring period, and continuously monitoring the measurement data of the acceleration sensor and the load sensor of the subway vehicle in the monitoring period;
wherein, the monitoring period can be 20 days to 45 days, and the monitoring period in this embodiment is 30 days;
and carrying out statistical analysis on the collected acceleration data and the collected load data so as to determine the relation between the theoretical acceleration and the load.
As an alternative implementation, in the actual operation of the subway, the relationship between the theoretical acceleration and the load is as follows:
actual acceleration a of the car numbered 11As a reference:
Ai＝F(m1,mi)×a1
wherein m is1The load of the carriage with the number of 1 is obtained; a. theiTheoretical acceleration of a car numbered i, miThe load of the car numbered i, F (m)1,mi) About the load miIs calculated by using statistics.
As an alternative embodiment, the method for determining whether the acceleration is abnormal is as follows:
the actual acceleration of the compartment with the number i measured by the acceleration sensor is aiThe test constant is epsilon:
if | Ai-aiIf | < ε, then aiAbsence of anomalies;
if | Ai-aiIf | ≧ epsilon, then aiIf there is an abnormality, the suspension system of the car numbered i may have a failure, and the alarm gives a failure alarm.
As an alternative embodiment, because the probability of the simultaneous failure of the suspension systems of the multiple cars is very low, when judging whether the acceleration is abnormal or not, if the actual acceleration a of the car numbered 1 is used, the actual acceleration a is determined1The vehicle compartment with the acceleration of more than n/2 sections calculated as the reference satisfies | Ai-aiIf | ≧ epsilon, the suspension system of the reference acceleration compartment (compartment numbered 1) has the possibility of failure, and the alarm gives a fault alarm; and simultaneously replacing the carriages serving as reference acceleration, and re-determining the theoretical acceleration of each carriage:
Ai＝F(m2,mi)×a2
wherein, a2The actual acceleration of the car numbered 2 as a reference; m is2The load of the carriage with the number of 2 is obtained; a. theiTheoretical acceleration of a car numbered i, miThe load of the car numbered i, F (m)2,mi) About the load miA function of (a);
compare | A againi-aiDetermining the actual acceleration a of each compartment by the magnitude of |, and ∈ |iWhether there is a differenceAnd often, judging whether the corresponding suspension system is in failure.
In the operation process of the subway, if a certain carriage suspension system breaks down, passengers are easy to have the phenomenon of 'nodding' when entering the station at a deceleration state, and passengers are easy to have the phenomenon of 'rising' when going out of the station at an acceleration state. Based on the method, the motion condition of each carriage of the subway vehicle is monitored in real time by adopting the three-axis acceleration sensor. When the load of each carriage of the subway is the same, if the acceleration of one carriage is obviously different from that of other carriages, the suspension system corresponding to the carriage is considered to be possibly broken down. Because the load capacity of each carriage is different in most cases in the running process of the subway, the invention determines the relation between the acceleration and the load capacity by using a statistical method, and further determines whether the suspension system has a fault or not by determining whether the acceleration is abnormal or not.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The device for identifying the faults of the suspension system of the metro vehicle is characterized by comprising an acceleration sensor, a load sensor and an alarm system; wherein:
the acceleration sensors are respectively arranged at each carriage of the subway vehicle and used for measuring the acceleration of the subway vehicle;
the load sensor is arranged at the bottom of each carriage of the subway vehicle and is used for monitoring the load condition of the subway vehicle;
the alarm system is arranged in the cab and comprises a data processor, an electric control module and an alarm which are sequentially connected, and the acceleration sensor and the load sensor are connected to the input end of the data processor; the data processor is used for receiving and identifying data information acquired by each acceleration sensor and each load sensor and sending an instruction to the electronic control module, and the electronic control module is used for controlling the alarm to carry out fault early warning.
2. An apparatus for metro vehicle suspension system fault identification as claimed in claim 1, wherein said acceleration sensor is a three-axis acceleration sensor.
3. An apparatus for subway vehicle suspension system fault identification as claimed in claim 1, wherein said alarm is provided with n number, respectively corresponding to n number of cars of subway vehicle.
4. A method for identifying faults of a suspension system of a metro vehicle based on the device of claim 1, which is characterized by comprising the following steps:
the acceleration sensor and the load sensor respectively monitor the acceleration and the load of each carriage of the subway vehicle in real time and transmit the measured data to the data processor in real time;
the data processor carries out identification processing to the acceleration data and the load data collected, analyzes to obtain the carriage with abnormal acceleration, and comprises the following components:
when the load of each compartment is the same and the acceleration of one or more compartments deviates from the acceleration of other compartments, the acceleration of one or more compartments is abnormal;
when the loads of all the carriages are different, determining the relationship between the theoretical acceleration and the loads by using a statistical method, calculating the theoretical acceleration of each carriage according to the load of each carriage, and judging whether the actual acceleration is abnormal or not according to the difference value of the theoretical acceleration and the actual acceleration;
when the compartment with abnormal acceleration occurs, the data processor sends an instruction to the electric control module, and the electric control module controls the corresponding alarm to perform fault early warning.
5. A method of performing fault identification of a suspension system of a metro vehicle according to claim 4, wherein the relationship between theoretical acceleration and load is determined by the following method:
ensuring that a metro vehicle suspension system has no abnormal condition or fault, and simultaneously installing a metro vehicle suspension system fault recognition device;
setting a monitoring period, and continuously monitoring the measurement data of the acceleration sensor and the load sensor of the subway vehicle in the monitoring period;
and carrying out statistical analysis on the collected acceleration data and the collected load data so as to determine the relation between the theoretical acceleration and the load.
6. A method for carrying out fault identification on a suspension system of a metro vehicle as claimed in claim 5, wherein each carriage of the metro vehicle is numbered, wherein the number i is 1,2,3,4,5 … n, and n is a positive integer; in the actual operation of the subway vehicle, the relation between the theoretical acceleration and the load is as follows:
Ai＝F(m1,mi)×a1
wherein, a1The actual acceleration of the car numbered 1 as a reference; m is1The load of the carriage with the number of 1 is obtained; a. theiTheoretical acceleration of a car numbered i, miThe load of the car numbered i, F (m)1,mi) About the load miAs a function of (c).
7. A method for carrying out fault identification on a suspension system of a metro vehicle according to claim 6, wherein the method for judging whether the acceleration is abnormal is as follows:
the actual acceleration of the compartment with the number i measured by the acceleration sensor is aiThe test constant is epsilon:
if | Ai-aiIf | < ε, then aiAbsence of anomalies;
if | Ai-aiIf | ≧ epsilon, then aiIf there is an abnormality, the suspension system of the car numbered i may have a failure, and the alarm gives a failure alarm.
8. According to claimThe method for identifying a failure in a suspension system of a metro vehicle according to claim 7, wherein if the acceleration is abnormal, if | a is present in the cars having more than n/2 knotsi-aiIf the [ epsilon ] is more than or equal to the [ epsilon ], the suspension system of the acceleration carriage serving as the reference has the possibility of failure, and the alarm gives a failure alarm; and simultaneously re-determining the theoretical acceleration of each compartment:
Ai＝F(m2,mi)×a2
wherein, a2The actual acceleration of the car numbered 2 as a reference; m is2The load of the carriage with the number of 2 is obtained; a. theiTheoretical acceleration of a car numbered i, miThe load of the car numbered i, F (m)2,mi) About the load miA function of (a);
compare | A againi-aiDetermining the actual acceleration a of each compartment by the magnitude of |, and ∈ |iWhether an exception exists.
9. A method of performing fault identification of a suspension system of a metro vehicle according to claim 5, wherein the monitoring period is 20 days to 45 days.
10. A method of performing identification of a metro vehicle suspension system fault according to claim 4, wherein the suspension system fault identification apparatus is operated when the metro vehicle is in a horizontal straight running stage.
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