CN101879907A - Device and method for automatic braking and parking of freight train derailment - Google Patents

Abstract

The invention discloses a derailment automatic braking device and method for freight trains. The device includes a vibration sensor module, a vibration spectrum analysis and processing unit, an automatic charging energy storage device, a solenoid valve, a braking device and a storage module. The method uses digital sensors to pick up the vibration signals of vehicle wheelsets and bearings, and then picks up the vibration information of the characteristic frequency band through the frequency domain analysis method to judge whether the train is derailed, and stores the characteristic data of the vibration into a non-volatile memory. It is used for state recording; if derailment occurs, the alarm mechanism will be activated, the brake device will act to brake the train until it stops, and the sound and light alarm device will send out an alarm signal. The invention monitors the running state of the railway freight car in real time, can detect hidden troubles, sends out early warning signals for possible derailment states, and prevents accidents.

Description

Device and method for automatic braking and parking of freight train derailment

technical field

The invention designs a derailment automatic braking and parking device and method for freight trains, and belongs to the technical field of dynamic testing and calibration of derailment automatic parking.

Background technique

During the operation of freight trains, accidents of wheel derailment occur frequently due to various reasons. Because there is no effective way to detect and brake urgently in time for the derailment of freight cars, it causes great losses and troubles to the railway engineering department every year, and affects the normal transportation of the railway to a large extent.

In addition to causing harm to the safety of the truck itself, the derailment accident of the truck will also cause accidents such as cutting sleepers to cause damage to the line and cause danger to other vehicles running at high speed on the line. Especially in the case of the current railway speed-up and the implementation of EMU operation, freight train derailment accidents may cause major property and personnel damage and losses in today's railway operation process, with serious consequences.

Since the operating state of the vehicle can be reflected essentially by the vibration signal characteristics of its bearings, and the derailment of the truck will lead to obvious changes in the vibration frequency of the wheel axle, so relying on vibration analysis, intelligent control technology, and electronic technology for truck axles It is a completely feasible and effective method to collect and detect vibration signals, and to discover the derailment accident of the truck in time in essence, so as to brake in time and urgently.

Contents of the invention

The object of the present invention is to provide an automatic braking and parking device and method for derailed freight trains aiming at the defects existing in the prior art.

In order to achieve the above object, the present invention adopts the following technical solutions:

The derailment automatic braking and parking device for freight trains of the present invention includes a vibration sensor module, a vibration spectrum analysis processing unit, an automatic charging energy storage device, a solenoid valve, a braking device and a storage module, wherein: the output end of the vibration sensor module is connected to the vibration spectrum analysis The input end of the processing unit and the output end of the vibration spectrum analysis processing unit are connected to the storage module, the solenoid valve and the input end of the braking device, and the automatic charging energy storage device supplies power to each module.

Preferably, each car of the freight train is equipped with an alarm device on the locomotive, and the alarm device is connected to the vibration spectrum analysis and processing unit.

Preferably, the vibration sensor module includes 4 vibration sensors based on MEMS.

Preferably, the vibration spectrum analysis and processing unit is composed of a digital signal processing unit connected in series with a control unit.

The braking method of the derailment automatic braking parking device for freight trains comprises the following steps:

a. The vibration sensor measures the vibration component of the axle perpendicular to the rail and parallel to the crossties in real time;

b. The vibration spectrum analysis processing unit performs frequency domain analysis and comparison on the vibration data perpendicular to the rail direction to determine whether it has derailed;

c. The vibration spectrum analysis processing unit performs frequency domain analysis and comparison on the vibration data in the horizontal direction to determine whether there is lateral instability;

d. The vibration spectrum analysis processing unit performs state analysis and failure prediction on the basis of the vibration information of the wheel set and the bearing operating frequency band collected in steps b and c;

e. When the state is judged to be derailed, the vibration spectrum analysis processing unit controls the solenoid valve and the braking device to implement vehicle braking, and the alarm device sends out an alarm;

f. The storage module cyclically stores real-time data.

The invention integrates domestic and foreign leading micro sensor technology, chip technology, signal processing technology and wireless digital communication technology, adopts micro vibration sensor based on MEMS technology to pick up the vibration information of the four bearings in the lower part of the vehicle, and the vibration sensor measures in real time that the axle is perpendicular to the rail For the vibration component parallel to the direction of the crossties, the dedicated digital signal processing unit conducts frequency spectrum analysis on the vibration signals of all bearings to obtain two-dimensional vibration characteristic parameters, distinguish the running state of the train and the lateral stability coefficient, and monitor the fault information of the bearings at the same time; It is judged that there is a risk of lateral instability of the train, and an early warning signal is issued, and the early warning data is recorded; when it is judged that the bearing has a potential failure, an early warning signal is sent to remind the crew to check and repair after the train, and the early warning data is recorded; when the train is judged to be derailed, the alarm mechanism is activated, and the execution unit Exhaust the air duct to realize automatic braking until parking, and at the same time start the sound and light alarm to remind the occupants of the vehicle; all the above signals communicate with the alarm indicator in a wireless manner. All units are powered by wind power and battery modules to meet the system's application on passive freight trains. The device of the invention has a simple structure, and important protection is implemented for all exposed working units to ensure the stability of its work in harsh environments; more importantly, it adopts a spectrum analysis and judgment mechanism, which effectively avoids large vibrations and rolling Misjudgment in non-derailment situations such as loading and unloading.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Detailed ways

As shown in Figure 1, the automatic braking and parking device for freight train derailment of the present invention includes a vibration sensor module, a vibration spectrum analysis processing unit, an automatic charging energy storage device, a solenoid valve, a braking device and a storage module, wherein: the vibration sensor module The output end is connected to the input end of the vibration spectrum analysis processing unit, the output end of the vibration spectrum analysis processing unit is connected to the storage module, the solenoid valve and the input end of the braking device, and the automatic charging energy storage device supplies power to each module.

Preferably, each car of the freight train is equipped with an alarm device on the locomotive, and the alarm device is connected to the vibration spectrum analysis and processing unit.

Preferably, the vibration sensor module includes 4 vibration sensors based on MEMS.

Preferably, the vibration spectrum analysis and processing unit is composed of a digital signal processing unit connected in series with a control unit.

The braking method of the derailment automatic braking parking device for freight trains comprises the following steps:

a. The vibration sensor measures the vibration component of the axle perpendicular to the rail and parallel to the crossties in real time;

b. The vibration spectrum analysis processing unit performs frequency domain analysis and comparison on the vibration data perpendicular to the rail direction to determine whether it has derailed;

c. The vibration spectrum analysis processing unit performs frequency domain analysis and comparison on the vibration data in the horizontal direction to determine whether there is lateral instability;

d. The vibration spectrum analysis processing unit performs state analysis and failure prediction on the basis of the vibration information of the wheel set and the bearing operating frequency band collected in steps b and c;

e. When the state is judged to be derailed, the vibration spectrum analysis processing unit controls the solenoid valve and the braking device to implement vehicle braking, and the alarm device sends out an alarm;

f. The storage module cyclically stores real-time data.

The invention adopts a micro-vibration sensor based on MEMS technology, and the sensor is installed on the saddle of the freight train to collect frame vibration information, and sends the vibration information to the off-stop controller for signal frequency domain analysis.

The vibration spectrum analysis processing unit is packaged in a solid cast iron shell to ensure that its internal structure is difficult to damage even in harsh environments, and the original information of train operation is well preserved, which acts like a black box. The vibration spectrum analysis and processing unit is installed in the center of the bottom of the vehicle. The dedicated digital signal processing unit conducts frequency spectrum analysis on the vibration signals of all bearings to obtain two-dimensional vibration characteristic parameters to determine the running state of the train and the lateral stability coefficient, while monitoring the operation of the bearings. Information; when it is judged that there is a risk of lateral instability of the train, an early warning signal is sent and the early warning data is recorded; when it is judged that the bearing has a potential failure, an early warning signal is sent to remind the members to check and repair after boarding, and the early warning data is recorded; when the train is judged to be derailed, the alarm mechanism is activated , the execution unit exhausts the air duct to realize automatic braking until parking, and at the same time starts the sound and light alarm to remind the occupants of the vehicle; all the above signals communicate with the alarm indicator in a wireless manner.

The device of the present invention is installed on a passive freight train, and its working energy all comes from the wind power generator installed at the lower part of the vehicle. The wind turbine has a strong protective cover to ensure that it will not be damaged by foreign objects when working under the vehicle; when the vehicle speed reaches a certain value, the output voltage of the generator exceeds 12V, and then it starts to charge the battery module in the controller. At other times, the battery maintains the electric energy for system operation.

The solenoid valve is controlled by the main controller of the off-stop controller. When the main controller sends out the braking command, the solenoid valve opens, so that the main air duct at the lower part of the car can realize exhaust braking, so as to achieve the purpose of stopping in time and reducing accident losses.

Claims (5)

1. goods train derailing autobrake lugs, it is characterized in that: involving vibrations sensor assembly, vibration frequency specturm analysis processing unit, charge energy storage equipment, electromagnetic valve and brake equipment and memory module automatically, wherein: the mouth of vibration sensor module connects the input end of vibration frequency specturm analysis processing unit, the mouth of vibration frequency specturm analysis processing unit connects the input end of memory module and electromagnetic valve and brake equipment, and the energy storage equipment that charges is automatically given each module for power supply.

2. goods train derailing autobrake lugs according to claim 1, it is characterized in that: assemble warning device on described goods train every joint compartment and the locomotive, warning device is connected with the vibration frequency specturm analysis processing unit.

3. 1 goods train derailing autobrake lugs according to claim 1, it is characterized in that: the vibration sensor module comprises 4 vibratioies sensor based on MEMS.

4. goods train derailing autobrake lugs according to claim 1 and 2, it is characterized in that: the vibration frequency specturm analysis processing unit is made of digital signal processing unit serial connection control unit.

5. the braking method based on the described goods train derailing of claim 1 autobrake lugs is characterized in that comprising the steps:

A. vibration sensor is measured axletree in real time perpendicular to rail and the oscillating component that is parallel to the sleeper direction;

B. the vibration frequency specturm analysis processing unit judges whether to derail to carry out frequency-domain analysis and comparison perpendicular to rail direction vibration data;

C. the vibration frequency specturm analysis processing unit carries out frequency-domain analysis and comparison to the horizontal direction vibration data, judges whether to exist horizontal unstability;

D. the wheel gathered according to step b and c of vibration frequency specturm analysis processing unit to the vibration information of bearing working frequency range, it is carried out state analysis and failure prediction;

E. when state was judged as derailing, vibration frequency specturm analysis processing unit control electromagnetic valve and brake equipment were implemented car brakeing, and warning device gives the alarm;

F. real time data is stored in the memory module circulation.

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