Pipe pressure fluctuation monitoring device for heavy-load combined train

Abstract

The utility model provides a heavy-load combined train pipe pressure fluctuation monitoring device, and belongs to the technical field of train pipe pressure monitoring. The problems that existing train fluctuation monitoring is not comprehensive and not portable are solved. Comprising a shell, a host, an acquisition unit and a power supply module are installed in the shell, the shell is provided with an RS485 port and an Ethernet port, the power supply module supplies power to the host and the acquisition unit, and the host is connected with the acquisition unit through a wire. The acquisition unit is respectively connected with a balanced air cylinder pressure sensor, a train pipe pressure sensor and an environment detection sensor through leads, the balanced air cylinder pressure sensor is mounted in a balanced air cylinder pressure detection hole reserved in a locomotive brake unit, and the train pipe pressure sensor is mounted in a train pipe pressure detection hole reserved in the locomotive brake unit; the host is connected with a junction box on the locomotive through an RS485 port to obtain the running speed and running position data of the locomotive; the pressure monitoring device is applied to heavy-load combined train pipe pressure monitoring.

Description

TECHNICAL FIELD

[0001] The utility model provides a kind of heavy load combined train pipe pressure fluctuation monitoring device, belong to train pipe pressure monitoring technical field. BACKGROUND

[0002] The air brake system of train is the main way of train speed regulation, parking, and for heavy load train, it is the most important control target in the link of stable operation and accurate control, and it is one of the most important control systems in train. According to the principle of train air brake system, the braking force generated by train air brake is determined by the pressure reduction of train pipe, and the pressure reduction of train pipe is controlled by the driver through the brake. However, during the operation of heavy load train, the phenomenon of pipe pressure rising fluctuation occurs, which occurs before train braking and lasts until the moment of air brake application, which will affect the train braking force, resulting in too large or too small. The train air brake force too large will increase the train longitudinal force, which is not conducive to the safety of train operation, and the train air brake force too small will weaken the train braking force, which will bring safety hazards to train operation.

[0003] After comprehensive analysis, it is found that the phenomenon of pipe pressure rising fluctuation is relatively concentrated in season and location, and the main reason is that temperature, air pressure and other factors cause pressure fluctuation. However, there is no historical test result to be used as the basis for judgment, so it is difficult to develop the most effective preventive measures, which is not conducive to the safety management of heavy load train. Therefore, it is of great safety value and practical significance to develop a monitoring device for monitoring the influence factors of heavy load train braking system and pipe pressure fluctuation. However, it is not only greatly increases the operation cost to install a set of monitoring device for each train or each locomotive, but also increases the workload of operation and maintenance management. Therefore, according to the actual demand, it is necessary to develop a portable monitoring device, which can be used for the correlation monitoring of pipe pressure fluctuation influence factors of heavy load combined train and unit train, and is convenient for subsequent analysis of real pipe pressure fluctuation influence factors and quantitative relationship, so as to provide basis for formulating pipe pressure fluctuation suppression measures. UTILITY MODEL CONTENT

[0004] The utility model proposes a kind of heavy load combined train pipe pressure fluctuation monitoring device to solve the problem of not comprehensive and not portable existing in the train fluctuation monitoring, the purpose is to improve the mechanical and circuit structure of device, so that it can be used on railway locomotive, and can realize comprehensive monitoring of pipe pressure fluctuation.

[0005] The utility model discloses a technical scheme for: a heavy load combined train pipe pressure fluctuation monitoring devices, including the casing, the casing is installed with host computer, collection unit and power module, be provided with RS485 port and ethernet port on the casing, the power module gives host computer and collection unit power respectively, the host computer is connected collection unit through the wire, the collection unit is connected with the equalizing air cylinder pressure sensor, train pipe pressure sensor, environmental detection sensor respectively through the wire, wherein the equalizing air cylinder pressure sensor is installed on the equalizing air cylinder pressure detection hole reserved on the locomotive brake unit, and the train pipe pressure sensor is installed on the train pipe pressure detection hole reserved on the locomotive brake unit.

[0006] The host computer is connected with the junction box on the locomotive through the RS485 port, and the running speed and running position data of the locomotive are acquired.

[0007] Further, the environmental detection sensor includes a temperature and humidity sensor and a barometric pressure sensor for collecting temperature and humidity and environmental barometric pressure during train pipe operation.

[0008] Further, the host computer is internally integrated with a central controller, a 4G / 5G module and an RS485 port.

[0009] Further, the host computer also communicates with a general Beidou time service device through the RS485 port or the Ethernet port.

[0010] Further, the collection unit includes a collection board card and an AD conversion module, and the terminal rows on the collection board card are respectively connected with the wires and then connected with the sensors, and the analog signals collected by the collection board card are converted into digital signals by the AD conversion module and sent to the host computer.

[0011] Further, the equalizing air cylinder pressure sensor is installed in the equalizing air cylinder pressure detection hole through the first transition joint, and the train pipe pressure sensor is installed in the train pipe pressure detection hole through the second transition joint.

[0012] Further, the barometric pressure sensor adopts an absolute pressure sensor to collect environmental barometric pressure data.

[0013] Further, the host computer is connected with a train operation monitoring device through an LKJ93 type wiring expansion box.

[0014] The utility model discloses relative to prior art has the beneficial effect of: the utility model discloses to 20,000 tons heavy load combined train pipe pressure fluctuation's influencing factor monitoring, realizes the master, and the slave control locomotive end monitoring equipment clock synchronization and monitoring process periodic communication method. Mainly have the following several points:

[0015] 1. Can satisfy the data collection required by unit heavy load train pipe pressure fluctuation analysis;

[0016] 2. For the pipe pressure fluctuation monitoring of heavy load combined train, has the function of receiving timing, meets the demand of simultaneous monitoring of multiple locomotives in combined train;

[0017] 3. For 20,000-ton heavy load train, the monitoring data of master and slave control locomotives can realize periodic communication of two sets of pipe pressure fluctuation monitoring equipment through telecom public network, meet the demand of data analysis in monitoring process. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further described in connection with the drawings:

[0019] Figure 1 It is the circuit diagram of the utility model device;

[0020] Figure 2 It is the schematic diagram of the utility model device collecting locomotive speed and position;

[0021] Figure 3 It is the schematic diagram of the arrangement structure of the utility model device used on the locomotive;

[0022] Figure 4 It is the data record format drawing of the monitoring host of the utility model. DETAILED DESCRIPTION

[0023] As Figures 1 to 4 Indicated, the utility model provides a kind of heavy load combined train pipe pressure fluctuation monitoring device, to meet the demand of portable monitoring, device uses split design, cable connection between each part.The monitoring device is mainly composed of host computer, acquisition unit and sensor, as Figure 1 Indicated. Host computer is developed from embedded industrial flat plate, inlay monitoring software, and integrates power module to power acquisition unit and sensor, shell is equipped with RS485 port and Ethernet port, for receiving locomotive RS485 bus information and the information sent by acquisition unit;Acquisition unit includes acquisition board card (A68D) and AD conversion module, acquisition board card is used to collect the analog quantity of sensor, AD conversion module is used to convert analog quantity into digital information and send to host computer through Ethernet port;Sensor includes locomotive equalizing air cylinder pressure sensor, locomotive train pipe pressure sensor, environment temperature and humidity sensor, environment barometric pressure sensor, sensor output signal is all 0-10V voltage signal.

[0024] According to actual demand, when monitoring device collects locomotive state data, it cannot affect the normal operation of locomotive and hauled vehicle. Since the device is portable, it needs to have the convenience of temporarily installing before train starts and removing after train stops, so the acquisition mode needs to be convenient to disassemble, mainly including the following several portable data acquisition modes.

[0025] (1) the acquisition of locomotive equalizing air cylinder pressure and brake cylinder pressure

[0026] The design of the locomotive brake unit reserves a pressure detection hole for the equalizing air cylinder and train pipe on the brake unit, which is used for inserting a detection pressure gauge to calibrate the pressure of the equalizing air cylinder and train pipe during the preparation and maintenance of the locomotive. The device uses the detection hole to make a transition joint of corresponding size for connecting the sensor to collect the pressure of the brake cylinder and equalizing air cylinder. The output signal of the sensor is a 0-10V voltage signal.

[0027] This way of collecting the pressure of the locomotive equalizing air cylinder and train pipe is safe and reliable, easy to disassemble and assemble, and does not affect the operation of the locomotive before and after disassembly and assembly. Since the pressure sensor is used to monitor the small change of the train pipe and equalizing air cylinder pressure, a sensor with high precision is selected. The device selects a sensor with a precision of 0.5 ‰.

[0028] (2) Collection of locomotive running speed and position data

[0029] The running speed and position of the locomotive are detected and recorded in the train operation monitoring device (LKJ), but direct collection in the train operation monitoring device may trigger train braking and parking protection due to the impact on the operation of this device. Therefore, in the train operation monitoring device management method, other devices are not allowed to be directly connected to it.

[0030] The locomotive safety comprehensive monitoring device is an external device information interaction platform of the train operation monitoring device, and the LKJ93 type wiring expansion box is connected on the RS485 bus of this platform. The device collects the position and speed of the locomotive through the expansion box using the RS485 bus in a listening mode. It does not affect the normal operation of the train operation monitoring device and the locomotive. The connection principle is shown in Figure 2 .

[0031] 3. Collection of environmental data

[0032] The environmental data includes the environmental air pressure and temperature and humidity when the train pipe is running. It is collected by an absolute pressure sensor and a temperature and humidity sensor. The output signal of the sensor is a 0-10V voltage signal.

[0033] 4. Collection of sensor signals

[0034] Since the train pipe pressure fluctuation is affected by the equalizing air cylinder and environmental factors, the train pipe pressure sensor, equalizing air cylinder pressure sensor, temperature and humidity sensor, and air pressure sensor are all connected to an analog quantity acquisition module with analog-to-digital conversion function,

[0035] 5. Clock synchronization of multiple sets of devices

[0036] For a unit train, only one set of monitoring device is needed in the monitoring process because there is only one locomotive. If there are multiple locomotives, multiple monitoring devices are needed. For the test of a 20,000-ton heavy load combined train, two sets of test equipment are needed because there are two locomotives in the train. Before monitoring the 20,000-ton combined train, the time-granting device needs to grant time to the two sets of monitoring equipment to ensure that the clock scales of the two sets of equipment are consistent and the time consistency of the data recorded by the two sets of equipment for the two locomotives is ensured.

[0037] The general Beidou time-granting device is used to grant time to the monitoring device, and the monitoring device receives the Beidou clock information through the Ethernet or RS485 port to ensure the synchronization of the clocks of multiple devices.

[0038] During the time-granting process, the general Beidou time-granting device is connected to the monitoring device host through the Ethernet or RS485 port. The general Beidou time-granting device sends clock information through the port, and after selecting the connection port on the time-granting interface of the monitoring device host, clicking the "receive time grant" button, the system clock is corrected to the Beidou time, and the total accuracy of the system time grant is 1ms.

[0039] For the pipe pressure fluctuation monitoring of a 20,000-ton heavy load combined train, after the clock synchronization setting is completed, the 4G / 5G module and sim card number built-in the host are matched and connected on the interface, and the master and slave control monitoring positions of the monitoring device are set, so as to facilitate the periodic communication of the pipe pressure fluctuation monitoring data of the master and slave control locomotives during the monitoring process, and the communication period is 5s. The principle of developing the pipe pressure fluctuation monitoring of a 20,000-ton heavy load combined train is shown in Figure 3 .

[0040] 6. Calculation, display and recording of data

[0041] The host of the monitoring device receives the sensor data and locomotive running speed and position information through the Ethernet port and RS485 port. The host communicates with the built-in 4G / 5G module through the built-in RS485 port, sends the monitoring information of the monitoring host, and receives the sent data of the monitoring host of the other locomotive which has been matched.

[0042] The host records the monitoring data and 4G / 5G module communication received data to the local database. The device uses the MySql database to record the monitoring data, and the data format is shown in Figure 4 .

[0043] It should be noted that the connection relationship between the components and modules of the utility model is determined and can be realized, and the specific connection relationship can bring about corresponding technical effects, and based on the premise of not relying on the corresponding software program execution, the technical problems proposed by the utility model are solved, the model, the connection mode between the components and modules, the specific components, the conventional use method brought about by the above technical features, the predictable technical effects, and the like are all the disclosed contents in the patent, journal paper, technical manual, technical dictionary, textbook, and the like that can be obtained by the technical personnel in the field before the application date, or are the existing technology such as the conventional technology and the common knowledge, and thus do not need to be described in detail, so that the technical scheme provided in the case is clear, complete, and realizable, and the corresponding entity product can be reproduced or obtained according to the technical means.

[0044] Finally, it should be noted that: the above embodiments are only used to illustrate the technical scheme of the utility model, rather than limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the utility model.

Claims

1. A heavy-haul consist pipe pressure fluctuation monitoring device comprising a housing, characterized by: The shell is internally provided with a host computer, an acquisition unit and a power module, and is externally provided with an RS485 port and an Ethernet port, the power module supplies power to the host computer and the acquisition unit respectively, the host computer is connected with the acquisition unit through wires, the acquisition unit is connected with an equalizing air cylinder pressure sensor, a train pipe pressure sensor and an environment detection sensor through wires respectively, the equalizing air cylinder pressure sensor is installed in an equalizing air cylinder pressure detection hole reserved on a locomotive brake unit, and the train pipe pressure sensor is installed in a train pipe pressure detection hole reserved on the locomotive brake unit. The host computer is connected with a junction box on the locomotive through the RS485 port to obtain running speed and position data of the locomotive.

2. The heavy-haul consist train pipe pressure fluctuation monitoring device of claim 1, wherein: The environment detection sensor comprises a temperature and humidity sensor and a barometric pressure sensor for collecting temperature and humidity and barometric pressure of the train pipe when running.

3. The heavy haul consist train pipe pressure fluctuation monitoring device of claim 1, wherein: The host computer is internally integrated with a central controller, a 4G / 5G module and an RS485 port.

4. The heavy-haul consist pipe pressure fluctuation monitoring device of claim 3, wherein: The host computer is further connected with a general Beidou time service device through the RS485 port or the Ethernet port.

5. The heavy-haul consist pipe pressure fluctuation monitoring device of claim 1, wherein: The acquisition unit comprises an acquisition board and an AD conversion module, terminals on the acquisition board are connected with the sensors through wires, and analog signals collected by the acquisition board are converted into digital signals by the AD conversion module and then transmitted to the host computer.

6. The heavy haul consist train pipe pressure fluctuation monitoring device of claim 1, wherein: The equalizing air cylinder pressure sensor is installed in the equalizing air cylinder pressure detection hole through a first transition joint, and the train pipe pressure sensor is installed in the train pipe pressure detection hole through a second transition joint.

7. The heavy haul consist train pipe pressure fluctuation monitoring device of claim 2, wherein: The barometric pressure sensor adopts an absolute pressure sensor to collect barometric pressure data.

8. The heavy haul consist train pipe pressure fluctuation monitoring device of claim 1, wherein: The host computer is connected with a train operation monitoring device through an LKJ93 type junction expansion box.

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