Axle temperature alarm device suitable for freight train
By introducing a dual-redundant power supply and a redundant design with multiple communication methods into the freight train axle temperature detection system, the problem of insufficient adaptability of the system in harsh environments has been solved, and stable operation and accurate data transmission have been achieved in environments such as sandstorms, rain, and snow.
Patent Information
- Application Number
- CN202423130074.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Existing axle temperature detection systems for freight trains are not adaptable to complex operating conditions and are difficult to operate normally in harsh environments such as wind, sand, rain, and snow. Furthermore, their communication methods are limited and susceptible to electromagnetic interference, making it impossible to provide timely and accurate bearing condition assessments.
It adopts a dual-redundant power supply unit, acceleration acquisition unit, temperature acquisition unit and motherboard design, combined with isolated 485, MVB, dual-channel CAN communication modules and large-capacity storage chip to achieve redundant design of multiple communication methods, has audible and visual alarm functions, and can work stably in harsh environments.
The redundant design of multiple communication methods under complex working conditions improves the system's adaptability to harsh environments, ensures the reliability and accuracy of data transmission, and provides timely basis for bearing status judgment.
Smart Images
Figure CN223702614U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to axle temperature detection technical field especially relates to a kind of axle temperature alarm device suitable for freight train. BACKGROUND
[0002] At present, part of railway freight car is installed axle temperature detection system, can carry out real-time monitoring to axle temperature, when bearing has fault, alarm is carried out.Axle temperature detection system is generally composed of axle temperature alarm host computer and sensor, through monitoring the sharp temperature rise of wagon running part before failure precursor period, timely sound and light alarm signal is sent to remind driver to take corresponding measures, prevent the occurrence of major accident.Device recording locomotive each monitoring site temperature rise and failure situation.General 485, MVB, ethernet etc. Communication mode is communicated with other instruments or with display screen in local display data and alarm, there are also type can data be stored to storage equipment, provide real-time data for ground maintenance and technical analysis.Freight car operating environment is poor, need to have more adaptable axle temperature monitoring system. CONTENT OF UTILITY MODEL
[0003] The utility model solves the technical problems in the background art by providing an axle temperature alarm device suitable for freight train.
[0004] The utility model discloses a technical scheme that solves the above technical problems:
[0005] An axle temperature alarm device suitable for freight train includes a dual-redundancy power supply unit, an acceleration acquisition unit, a temperature acquisition unit and a mainboard.
[0006] The output end of the acceleration acquisition unit is connected to the input end of the mainboard, for acquiring bearing acceleration data.
[0007] The output end of the temperature acquisition unit is connected to the input end of the mainboard, for acquiring bearing temperature data.
[0008] The output end of the dual-redundancy power supply unit is connected to the input end of the mainboard, for providing required electric energy.
[0009] As a further preferred scheme of the axle temperature alarm device suitable for freight train, the mainboard is welded with a hard-wire output module, an MVB module, a 485 module and a dual-redundancy isolation CAN module.
[0010] The isolation 485 module is used to realize isolation 485 communication, and is set and debugged through maintenance interface 485, and can display 9-bit temperature data at the same time.
[0011] The MVB communication module is used to realize MVB communication.
[0012] Dual-channel isolation CAN module, used for realizing dual-channel CAN communication.
[0013] Hard-wired output module, used for outputting specified IO level.
[0014] As a further preferred scheme of the axle temperature alarm device suitable for freight train, the mainboard uses a large-capacity storage chip as a storage device, and can cyclically record 2000 groups of axle temperature data of the whole train, and additionally record 1000 times of alarm data.
[0015] As a further preferred scheme of the axle temperature alarm device suitable for freight train, the alarm temperature of the mainboard is fixed-point alarm: 90±2℃, and tracking alarm: ambient temperature +45℃.
[0016] As a further preferred scheme of the axle temperature alarm device suitable for freight train, the dual-channel redundant power supply unit can realize input voltage DC28V, fluctuation range DC19.6V-35V, and power not greater than 25W, and output dual-channel isolation voltage.
[0017] As a further preferred scheme of the axle temperature alarm device suitable for freight train, the audible and light alarm module is further included, which is linked with the mainboard and used for emitting audible and light alarm.
[0018] As a further preferred scheme of the axle temperature alarm device suitable for freight train, the temperature acquisition unit includes a voltage input end VCC end, a first resistor, a second resistor, a third resistor, a fourth resistor, an AD8495 chip, a voltage output VOUT, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and a triode Q1; wherein one end of the voltage input VCC end is connected with one end of the first resistor, the other end of the first resistor is respectively connected with a REF end of the AD8495 chip, a collector of the triode Q1 and a base of the triode Q1, an emitter of the triode Q1 is connected with a GND end, a -VS end of the AD8495 chip is connected with the GND end, an OUT end of the AD8495 chip and a SENSE end of the AD8495 chip are connected with the voltage output VOUT end, a +VS end of the AD8495 chip is respectively connected with the voltage input VCC end and one end of the first capacitor, the other end of the first capacitor is connected with the GND end, a +IN end of the AD8495 chip is respectively connected with one end of the second capacitor, one end of the third capacitor and one end of the second resistor, the other end of the second capacitor is connected with the GND end, the other end of the third capacitor is respectively connected with one end of the fourth capacitor, one end of the third resistor and the -IN end of the AD8495 chip, the other end of the fourth capacitor is grounded, the other end of the second resistor is connected with a P2 port of a load, the other end of the third resistor is respectively connected with one end of the fourth resistor and a J1 port of the load, and the other end of the fourth resistor is connected with the GND end.
[0019] Compared with the prior art, the technical scheme has the following technical effects:
[0020] The axle temperature alarm device suitable for freight trains has the following technical effects: BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0022] Figure 1 The axle temperature alarm device suitable for freight trains has the following technical effects:
[0023] Figure 2 The circuit diagram of the temperature acquisition unit is shown in the figure. DETAILED DESCRIPTION
[0024] The technical scheme of the present application will be further described in detail below in combination with the drawings:
[0025] The technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. The purpose and effect of the present application will become more apparent from the following detailed description of the present application according to the drawings and preferred embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and do not limit the present application.
[0026] An axle temperature alarm device suitable for freight trains, as shown in Figure 1 The axle temperature alarm device suitable for freight trains has the following technical effects:
[0027] The output end of the acceleration acquisition unit is connected to the input end of the mainboard, and is used for acquiring bearing acceleration data.
[0028] The output end of the temperature acquisition unit is connected to the input end of the mainboard, and is used for acquiring bearing temperature data.
[0029] The output end of the dual-redundancy power supply unit is connected to the input end of the mainboard, and is used for providing required electric energy.
[0030] The mainboard is welded with a hard-wire output module, an MVB module, a 485 module and a dual-redundancy CAN module.
[0031] The isolation 485 module is used for realizing isolation 485 communication, and is set and debugged through the maintenance interface 485, and can simultaneously display 9-bit temperature data.
[0032] The MVB communication module is used for realizing MVB communication.
[0033] The dual-redundancy CAN module is used for realizing dual-redundancy CAN communication.
[0034] The hard-wire output module is used for outputting a specified IO level.
[0035] The mainboard uses a large-capacity storage chip as a storage device, and can cyclically record 2000 groups of full-train axle temperature data and additionally record 1000 times of alarm data.
[0036] The alarm temperature of the mainboard is a fixed-point alarm of 90±2 DEG C, and a tracking alarm of ambient temperature + 45 DEG C.
[0037] The dual-redundancy power supply unit can realize an input voltage DC 28V, a fluctuation range DC 19.6V-35V, and a power not greater than 25W, and outputs a dual-redundancy voltage.
[0038] The new type of axle temperature detection system further comprises an audible and light alarm module, which is linked to the mainboard and is used for emitting audible and light alarms.
[0039] The new type of axle temperature detection system is characterized in that the mainboard can be set and debugged through the maintenance interface 485, and can simultaneously display 9-bit temperature data.
[0040] The new type of axle temperature detection system is characterized in that the mainboard has dual-redundancy isolation CAN communication and MVB communication, and the two-way CAN communication does not affect each other and has independent protocols.
[0041] The new type of axle temperature detection system is characterized in that the mainboard has a hard-wire output interface, and outputs a specified IO level through the interface when the system alarms.
[0042] The new axle temperature detection system is characterized in that the main board uses a large-capacity storage chip as a storage device, can cyclically record 2000 groups of full-train axle temperature data, and additionally records 1000 times of alarm data.
[0043] The new axle temperature detection system is characterized in that the alarm temperature of the main board is a fixed-point alarm: 90±2℃, and a tracking alarm: ambient temperature +45℃,
[0044] The new axle temperature detection system is characterized in that the power board can realize an input voltage DC28V (fluctuation range DC19.6V-35V) and a power not greater than 25W, and can output double-path isolated voltage, and any damage of the two sets of voltage systems does not affect the normal operation of the system.
[0045] The utility model discloses a double-path redundant power supply unit, acceleration acquisition unit, temperature acquisition unit and mainboard, and the mainboard is welded with the isolation 485 module, can realize isolation 485 communication, and the mainboard has MVB communication module, can realize MVB communication, and the mainboard has double-path isolation CAN communication module, can realize double-path CAN communication, and the host computer temperature rise is 45 DEG C, and when the axle temperature detection system alarm is detected to a certain point temperature greater than 45 DEG C.
[0046] The axle temperature detection system can collect 8 paths of axle temperature and 1 path of environment temperature, after collecting the 9 paths of temperature, whether alarm is judged according to algorithm in combination with the collected acceleration, and the data is sent through CAN and MVB communication mode, and the host computer detects 485 communication line periodically, and if there is 485 electric connection, the data is sent through 485 communication.
[0047] As Figure 2As shown, the temperature acquisition unit comprises a voltage input end VCC end, a first resistor, a second resistor, a third resistor, a fourth resistor, an AD8495 chip, a voltage output VOUT, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and a transistor Q1; wherein one end of the voltage input VCC end is connected with one end of the first resistor, the other end of the first resistor is connected with a REF end of the AD8495 chip, a collector of the transistor Q1 and a base of the transistor Q1 respectively, an emitter of the transistor Q1 is connected with a GND end, a -VS end of the AD8495 chip is connected with the GND end, an OUT end of the AD8495 chip and a SENSE end of the AD8495 chip are connected with the voltage output VOUT end, a +VS end of the AD8495 chip is connected with the voltage input VCC end and one end of the first capacitor respectively, the other end of the first capacitor is connected with the GND end, a +IN end of the AD8495 chip is connected with one end of the second capacitor, one end of the third capacitor and one end of the second resistor respectively, the other end of the second capacitor is connected with the GND end, the other end of the third capacitor is connected with one end of the fourth capacitor, one end of the third resistor and the -IN end of the AD8495 chip respectively, the other end of the fourth capacitor is grounded, the other end of the second resistor is connected with a P2 port of a load, the other end of the third resistor is connected with one end of the fourth resistor and a J1 port of the load respectively, and the other end of the fourth resistor is connected with the GND end. AD8495 provides internal cold junction compensation, and its high CRMM rejection has good rejection capability for common mode noise introduced by thermocouple wires or extension wires.
[0048] It should be noted that the above only the preferred embodiments of the present application, the present application is not limited to the above embodiments, as long as the same means to achieve the technical effects of the present application, should belong to the scope of the present application.
Claims
1. A shaft temperature alarm device suitable for freight trains, characterized in that: It includes a dual-redundant power supply unit, an acceleration acquisition unit, a temperature acquisition unit, and a motherboard; The output of the acceleration acquisition unit is connected to the input of the motherboard and is used to acquire bearing acceleration data. The output of the temperature acquisition unit is connected to the input of the motherboard and is used to acquire bearing temperature data. The output of the dual-redundant power supply unit is connected to the input of the motherboard to provide the required power.
2. The axle temperature alarm device for freight trains according to claim 1, characterized in that: The motherboard contains a hard-wired output module, an MVB module, an isolated 485 module, and a dual-channel isolated CAN module. The MVB communication module is used to implement MVB communication. Dual-channel isolated CAN module, used to implement dual-channel CAN communication; Hardwired output module, used to output specified I / O levels.
3. The axle temperature alarm device for freight trains according to claim 1, characterized in that: The motherboard uses a high-capacity storage chip as a storage device, which can cyclically record 2,000 sets of axle temperature data for the entire train, plus 1,000 alarm data.
4. The axle temperature alarm device for freight trains according to claim 1, characterized in that: The alarm temperature of the motherboard is a fixed alarm: 90±2℃, and a tracking alarm: ambient temperature +45℃.
5. The axle temperature alarm device for freight trains according to claim 1, characterized in that: The dual-redundant power supply unit can achieve an input voltage of DC28V, with a fluctuation range of DC19.6V to 35V, a power of no more than 25W, and an output dual-isolation voltage.
6. The axle temperature alarm device for freight trains according to claim 1, characterized in that: It also includes an audible and visual alarm module, which is connected to the motherboard and is used to issue audible and visual alarms.
7. The axle temperature alarm device for freight trains according to claim 1, characterized in that: The temperature acquisition unit includes a voltage input terminal VCC, a first resistor, a second resistor, a third resistor, a fourth resistor, an AD8495 chip, a voltage output VOUT, a first capacitor, a second capacitor, a triple capacitor, a fourth capacitor, and a transistor Q1. The voltage input terminal VCC is connected to one end of the first resistor, and the other end of the first resistor is connected to the REF terminal of the AD8495 chip, the collector of transistor Q1, and the base of transistor Q1. The emitter of transistor Q1 is connected to the GND terminal, the -VS terminal of the AD8495 chip is connected to the GND terminal, and the OUT and SENSE terminals of the AD8495 chip are connected to the voltage output VOUT. The UT terminal and the +VS terminal of the AD8495 chip are connected to the voltage input VCC terminal and one end of the first capacitor, respectively. The other end of the first capacitor is connected to the GND terminal. The +IN terminal of the AD8495 chip is connected to one end of the second capacitor, one end of the third capacitor, and one end of the second resistor, respectively. The other end of the second capacitor is connected to the GND terminal. The other end of the third capacitor is connected to one end of the fourth capacitor, one end of the third resistor, and the -IN terminal of the AD8495 chip, respectively. The other end of the fourth capacitor is grounded. The other end of the second resistor is connected to the P2 port of the load. The other end of the third resistor is connected to one end of the fourth resistor and the J1 port of the load, respectively. The other end of the fourth resistor is connected to the GND terminal.