CN208580310U - Based on monolithic processor controlled locomotive information display screen power panel - Google Patents
Based on monolithic processor controlled locomotive information display screen power panel Download PDFInfo
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- CN208580310U CN208580310U CN201821235576.6U CN201821235576U CN208580310U CN 208580310 U CN208580310 U CN 208580310U CN 201821235576 U CN201821235576 U CN 201821235576U CN 208580310 U CN208580310 U CN 208580310U
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Abstract
The utility model proposes one kind to be based on monolithic processor controlled locomotive information display screen power panel, it is intended to solve the problems, such as that existing locomotive information display screen power panel stability is poor, easy to damage and can repair poor.The power panel includes power circuit, single chip machine controlling circuit and CCFL drive module；The 15V DC voltage of input is divided into two-way after TVS pipe, generates 5V voltage by voltage stabilizing chip all the way, powers for second singlechip, and becomes corresponding interface output voltage；Another way is that first singlechip and third single-chip microcontroller are powered, and become corresponding interface output voltage by generating 5V isolated power supply through isolated power supply module again after electronic circuit breaker and current sense amplifier；The command information that second singlechip is provided according to first singlechip carries out power supply control to corresponding interface output voltage in the form of controlling metal-oxide-semiconductor, is supplied to CCFL drive module as control signal by the adjustable square wave of I/O mouthfuls of output frequencies.
Description
Technical field
The utility model relates to a kind of power supply boards designed for locomotive information display screen.
Background technique
With the fast development of track transportation industry, locomotive information display screen has become important man-machine interactive platform, main
Display terminal, display speed, cylinder pressure, tractive force, traction power, fault message etc. to be provided for entire microcomputer network system
Drive a vehicle key message, it is therefore seen that locomotive information display screen motorcycle safety is reliably run it is particularly important.It is electric in display screen
Source plate is then to ensure display screen an important factor for capable of working normally, therefore development for power panel and production are that have very much must
It wants.
Currently, existing locomotive information display screen power panel mainly selects a single-chip microcontroller in the market, communication is equal with execution
Completed by the single-chip microcontroller, cause system stability poor, and break down after be difficult to check, can repair it is poor, it is impossible to meet
The normal operation of locomotive.
Utility model content
The utility model proposes one kind to be based on monolithic processor controlled locomotive information display screen power panel, it is intended to solve existing
Locomotive information display screen power panel stability is poor, easy to damage and can repair poor problem.
The solution of the utility model is as follows:
Based on monolithic processor controlled locomotive information display screen power panel, including power circuit, single chip machine controlling circuit and
CCFL drive module；The single chip machine controlling circuit uses three single-chip microcontrollers；
In the power circuit, the 15V DC voltage of input is divided into two-way after TVS pipe, passes through voltage stabilizing chip all the way
5V voltage is generated, is powered for second singlechip, while also becoming the interface output voltage controlled by second singlechip；Another way is logical
It crosses after electronic circuit breaker and current sense amplifier progress overvoltage protection, overcurrent protection and short-circuit protection again through isolated power supply mould
Block generates 5V isolated power supply, is that first singlechip and third single-chip microcontroller are powered, while also accordingly being respectively become by first singlechip
(i.e. power supply signal comes from 5V isolated power supply, and the corresponding signal that controls comes respectively with the monolithic processor controlled interface output voltage of third
From first, third single-chip microcontroller)；
First singlechip carries out communication by control panel in serial ports and locomotive information display screen and obtains related data, passes through
Spi bus is communicated with second singlechip, is directly controlled interface by I/O mouthfuls and is exported 5V voltage；
Second singlechip, the command information provided according to first singlechip is to corresponding interface output voltage to control MOS
The form of pipe carries out power supply control, is supplied to CCFL drive module as control signal by the adjustable square wave of I/O mouthfuls of output frequencies；
It is powered and is isolated using analog multiplexer switch and optocoupler between first singlechip and second singlechip；
Third single-chip microcontroller is used for locomotive information display screen basis power supply control, directly controls interface by I/O mouthfuls and exports 5V
Voltage；
Triode and transformer are provided in the CCFL drive module, the adjustable square wave of frequency is defeated as control signal
Enter triode, will be AC signal by the 15V direct current signal inversion of electronic circuit breaker, then supreme by transformer boosting
Pressure lights CCFL fluorescent tube for driving.
Based on above scheme, the utility model has also further made following optimization:
First singlechip is 8 CMOS microcontrollers of the AVR risc architecture based on enhancing, and has dedicated reset
Chip；Second singlechip is 8 CMOS microcontrollers of the AVR risc architecture based on enhancing, and has dedicated reset coil
Piece；Third single-chip microcontroller is 8 CMOS microcontrollers with 8K system programmable flash storage, and has dedicated reset
Chip.
First singlechip is monitored the isolated power supply module, and micro- to isolated power supply module by digital regulation resistance
It adjusts.
Second singlechip connects temperature sensor to acquire the temperature of the locomotive information display screen power panel, and by logical
Communication interface obtains locomotive information display backplane temperature, and the temperature information of acquisition is transmitted to the first monolithic by the spi bus
Machine, and the command information control locomotive information display backplane fire-bar provided according to first singlechip is heated.
Third single-chip microcontroller is instructed with industry 80C51 product and pin is completely compatible.
The interface output voltage of first singlechip control is supplied to 5V power output interface all the way, second singlechip and third
Monolithic processor controlled interface output voltage is respectively supplied to multichannel 5V power output interface at two.Here, each power supply output connects
Mouth is also possible to the connector of single-input multi-output in itself.
The utility model has the following beneficial effects:
The utility model is defined based on the interface of normal power supplies plate, selects three single-chip microcontrollers, wherein third single-chip microcontroller is used for
Locomotive information display screen basis power supply control；First singlechip is responsible for being communicated with control panel in locomotive information display screen, the
Two single-chip microcontrollers carry out power supply control according to communication information；Using reliable, high speed SPI between first singlechip and second singlechip
Communication.In this way, basis power supply is separated with the power supply (control by control panel in locomotive information display screen) that need to be controlled, communicate
It is separated with executing, can effectively avoid the generation of the wild effect caused by system disorders, be in locomotive information display screen
Portion's Control card and CCFL fluorescent tube provide stable power supply.
The utility model has the advantages that good stability, small power consumption and the degree of modularity are high；And when an error occurs, hold
Easy fault point, maintenanceability is good, can satisfy the normal operation of locomotive.
Detailed description of the invention
Fig. 1 is based on monolithic processor controlled locomotive information display screen power panel block diagram.
Fig. 2 is CCFL drive module schematic diagram.
Specific embodiment
The power panel is the power supply board designed exclusively for locomotive information display screen.As shown in Figure 1, entire locomotive information
Display screen power panel is mainly made of power circuit, single chip machine controlling circuit and CCFL drive module three parts, wherein monolithic
Machine control circuit is core component.
Wherein, power circuit mainly includes voltage regulator circuit, overvoltage crowbar, current foldback circuit, short-circuit protection circuit
And isolated power supply module.Single chip machine controlling circuit is mainly by three singlechip groups at logical for carrying out temperature monitoring, data
News, output adjustable frequency square wave and each interface voltage output of control.CCFL drive module is mainly used for passing through 15V direct current
CCFL fluorescent tube is lighted in driving after the control inversion of adjustable frequency square wave and boosting.Specifically:
One, power circuit:
Monolith power panel board input 15V voltage is divided into two-way after TVS pipe, generates 5V by 5V voltage stabilizing chip all the way
Voltage is powered for second singlechip, and becomes interface output voltage；Another way is put by electronic circuit breaker chip and current detecting
Big device, input isolated power supply module generates 5V isolated power supply after carrying out overvoltage protection, overcurrent protection, short-circuit protection, is first single
Piece machine and the power supply of third single-chip microcontroller, and become interface output voltage.
Two, single chip machine controlling circuit:
Single chip machine controlling circuit mainly by first singlechip, second singlechip and third singlechip group at.
First singlechip is 8 CMOS microcontrollers of low-power consumption of the AVR risc architecture based on enhancing.It is straight using I/O mouthfuls
Control interface output 5V voltage is connect, isolated power supply is monitored using I/O mouthfuls and is finely tuned by digital regulation resistance.Pass through serial ports
Communication is carried out with control panel in locomotive information display screen and obtains related data, is communicated by spi bus and second singlechip.
With dedicated reset chip.
Second singlechip is 8 CMOS microcontrollers of low-power consumption of the AVR risc architecture based on enhancing.It is controlled using I/O mouthfuls
Metal-oxide-semiconductor processed exports 5V voltage to control interface, connects temperature sensor to acquire the locomotive information display screen power panel
Temperature, and locomotive information display backplane temperature (this temperature data comes from other function board) is obtained by communication interface, lead to
It crosses spi bus to be communicated with first singlechip, the temperature information of acquisition is transmitted to first singlechip, and control I/O mouthfuls of outputs
Voltage is heated to the power supply of liquid crystal screen back plate fire-bar.Using the I/O mouthfuls of adjustable square waves of output frequency, mentioned for CCFL drive module
For controlling signal.With dedicated reset chip.
Wherein, since first singlechip and second singlechip are for being electrically isolated, thus first singlechip and second singlechip it
Between by analog multiplexer switch and optocoupler to SPI communication be isolated, can ensure data transmission stability.
Third single-chip microcontroller is 8 a kind of low-power consumption, high-performance CMOS microcontrollers, and there is 8K system programmable Flash to deposit
Reservoir.It is manufactured using Atmel company high-density nonvolatile memory technology, it is complete with the instruction of industrial 80C51 product and pin
It is compatible.It is mainly used for control interface output 5V voltage.With dedicated reset chip.
Three, CCFL drive module:
As shown in Fig. 2, transistor base is controlled by the adjustable square wave of second singlechip I/O mouthfuls of output frequency, to control
It is AC signal by 15V direct current signal inversion, and boost to drive after high pressure by transformer and light whether triode ON processed
CCFL fluorescent tube, and CCFL lighting tube brightness can be adjusted by adjusting square wave frequency.
Claims (6)
1. being based on monolithic processor controlled locomotive information display screen power panel characterized by comprising power circuit, single-chip microcontroller control
Circuit and CCFL drive module processed；The single chip machine controlling circuit uses three single-chip microcontrollers；
In the power circuit, the 15V DC voltage of input is divided into two-way after TVS pipe, generates all the way by voltage stabilizing chip
5V voltage is powered for second singlechip, while also becoming the interface output voltage controlled by second singlechip；Another way passes through electricity
It is raw through isolated power supply module again after sub- breaker and current sense amplifier progress overvoltage protection, overcurrent protection and short-circuit protection
At 5V isolated power supply, it is that first singlechip and third single-chip microcontroller are powered, while also accordingly respectively becomes by first singlechip and the
Three monolithic processor controlled interface output voltages；
First singlechip carries out communication by control panel in serial ports and locomotive information display screen and obtains related data, total by SPI
Line is communicated with second singlechip, is directly controlled interface by I/O mouthfuls and is exported 5V voltage；
Second singlechip, the command information provided according to first singlechip is to corresponding interface output voltage to control metal-oxide-semiconductor
Form carries out power supply control, is supplied to CCFL drive module as control signal by the adjustable square wave of I/O mouthfuls of output frequencies；First
It is powered and is isolated using analog multiplexer switch and optocoupler between single-chip microcontroller and second singlechip；
Third single-chip microcontroller is used for locomotive information display screen basis power supply control, directly controls interface by I/O mouthfuls and exports 5V electricity
Pressure；
Triode and transformer are provided in the CCFL drive module, the adjustable square wave of frequency is as control signal input three
Pole pipe will be AC signal by the 15V direct current signal inversion of electronic circuit breaker, then boost to high pressure by the transformer and use
CCFL fluorescent tube is lighted in driving.
2. according to claim 1 be based on monolithic processor controlled locomotive information display screen power panel, it is characterised in that:
First singlechip is 8 CMOS microcontrollers of the AVR risc architecture based on enhancing, and has dedicated reset chip；
Second singlechip is 8 CMOS microcontrollers of the AVR risc architecture based on enhancing, and has dedicated reset chip；
Third single-chip microcontroller is 8 CMOS microcontrollers with 8K system programmable flash storage, and has dedicated reset
Chip.
3. according to claim 1 be based on monolithic processor controlled locomotive information display screen power panel, it is characterised in that: first
Single-chip microcontroller is monitored the isolated power supply module, and is finely tuned by digital regulation resistance to isolated power supply module.
4. according to claim 1 be based on monolithic processor controlled locomotive information display screen power panel, it is characterised in that: second
Single-chip microcontroller connects temperature sensor to acquire the temperature of the locomotive information display screen power panel, and obtains machine by communication interface
The temperature information of acquisition is transmitted to first singlechip by the spi bus by vehicle information display screen backboard temperature, and according to first
The command information control locomotive information display backplane fire-bar that single-chip microcontroller provides is heated.
5. according to claim 1 be based on monolithic processor controlled locomotive information display screen power panel, it is characterised in that: third
Single-chip microcontroller is instructed with industry 80C51 product and pin is completely compatible.
6. according to claim 1 be based on monolithic processor controlled locomotive information display screen power panel, it is characterised in that: first
Monolithic processor controlled interface output voltage is supplied to 5V power output interface all the way, and second singlechip and third are monolithic processor controlled
Interface output voltage is respectively supplied to multichannel 5V power output interface at two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821235576.6U CN208580310U (en) | 2018-08-01 | 2018-08-01 | Based on monolithic processor controlled locomotive information display screen power panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821235576.6U CN208580310U (en) | 2018-08-01 | 2018-08-01 | Based on monolithic processor controlled locomotive information display screen power panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208580310U true CN208580310U (en) | 2019-03-05 |
Family
ID=65511726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821235576.6U Active CN208580310U (en) | 2018-08-01 | 2018-08-01 | Based on monolithic processor controlled locomotive information display screen power panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208580310U (en) |
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2018
- 2018-08-01 CN CN201821235576.6U patent/CN208580310U/en active Active
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