CN109375666A - Low-temperature heat control method based on FPGA - Google Patents
Low-temperature heat control method based on FPGA Download PDFInfo
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- CN109375666A CN109375666A CN201811473630.5A CN201811473630A CN109375666A CN 109375666 A CN109375666 A CN 109375666A CN 201811473630 A CN201811473630 A CN 201811473630A CN 109375666 A CN109375666 A CN 109375666A
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- temperature
- fpga
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- display screen
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Central Heating Systems (AREA)
Abstract
The present invention discloses the low-temperature heat control method based on FPGA, and being somebody's turn to do the low-temperature heat control method based on FPGA includes: step 1, acquires the temperature of display screen；Step 2, according to the temperature of display screen collected, judge that the temperature is in a continuously temperature range from down to high multiple temperature ranges, each temperature range designs a corresponding heating duty ratio；Step 3, FPGA is heated according to the corresponding heating duty ratio of temperature of the acquisition to display screen.The low-temperature heat control method based on FPGA overcomes the more and more narrow problem of range of the material of auxiliary heating in the prior art, realizes the consistency of heating.
Description
Technical field
The present invention relates to be related to the low-temperature heat control method based on FPGA.
Background technique
This patent is applied on the airborne indicator of wide temperature working range, in order to realize -55 DEG C of low temperature work of product,
Increase auxiliary heating material in the liquid crystal display panel front end of display, so that liquid crystal display panel works normally under -55 DEG C of environment of low temperature.
Low-temperature heat control is carried out to the auxiliary heating material on liquid crystal display panel by the temperature sensor on liquid crystal display panel, works as sensor
Temperature be lower than a certain fixed temperature when, product is absolutely heated.
On the one hand, in order to improve the reliability that product heats, mutually backup is carried out using two-way sensor, product is carried out
Control is presently contemplated that the temperature difference of two-way sensing, use be two sensors average value to the heating of display into
Row control.And there are a defects for the method, when some sensor fault, the average value being calculated is problematic, thus
Product low-temperature heat is caused to go wrong.
On the other hand, because of the difference between auxiliary heating material, in cold-starting, obtained heating effect difference is very
Greatly, in order to meet the cold-starting heating effect of product and the consistency of heating power, it will lead to the material of auxiliary heating
Range is more and more narrow, will appear the qualification rate decline of raw material in this way.
Summary of the invention
The low-temperature heat control method based on FPGA that the object of the present invention is to provide a kind of, should the low-temperature heat based on FPGA
Control method overcomes the more and more narrow problem of range of the material of auxiliary heating in the prior art, realizes the consistent of heating
Property.
To achieve the goals above, the low-temperature heat control method based on FPGA that the present invention provides a kind of, this is based on
The low-temperature heat control method of FPGA includes:
Step 1, the temperature of display screen is acquired；
Step 2, according to the temperature of display screen collected, judge that the temperature is in continuously from down to high multiple temperature
A temperature range in section, each temperature range design a corresponding heating duty ratio；
Step 3, FPGA is heated according to the corresponding heating duty ratio of temperature of the acquisition to display screen.
Preferably, in step 1, the method for acquiring the temperature of display screen includes:
The temperature for being acquired display screen respectively using first sensor and second sensor is out of order in first sensor detection
And in the normal situation of second sensor, using the temperature of second sensor acquisition as the temperature of display screen；In the second sensing
Device detection is out of order and in the normal situation of first sensor, using the temperature of first sensor acquisition as the temperature of display screen
Degree；In the case where first sensor and second sensor are all detected and be out of order, temperature collection reports an error without heating；First
Under sensor and all normal situation of second sensor, acquired with the temperature and second sensor of first sensor acquisition
The average value of temperature is the temperature of display screen.
Preferably, in step 2, preset multiple temperature ranges include:
First temperature range, first temperature range are less than or equal to subzero 30 DEG C；
Second temperature section, the second temperature section be greater than subzero 30 DEG C, and be less than or equal to subzero 20 DEG C；
Third temperature range, the third temperature range be more than or equal to subzero 20 DEG C, and be less than or equal to subzero 10 DEG C,
4th temperature range, the 4th temperature range are more than or equal to subzero 10 DEG C.
Preferably, in step 2,
The corresponding heating duty ratio of first temperature range is 70%；
The corresponding heating duty ratio in the second temperature section is 60%；
The corresponding heating duty ratio of the third temperature range is 50%；
The corresponding heating duty ratio of 4th temperature range is 0, does not execute heating.
Preferably, in step 2, each temperature range is designed into a corresponding heating duty ratio, and by the heating
Duty ratio carries out power down preservation.
Preferably, in step 2, heating duty ratio is sent in E2PROM by I2C bus.
According to the above technical scheme, this method of the present invention can directly lead in the case where not changing original hardware printed board
Software realization is crossed, the correcting cost of PCB is reduced, reduces the development cycle of product；Using the internal resource of FPGA, by upper
Machine is operated, and is realized convenient and simple；The range of heater material can largely be increased according to this method, improve product
The qualification rate of raw material；For algorithm independent of specific FPGA platform, transplanting is convenient, can realize in common FPGA platform,
Such as Xilinx, Altera, Lattice etc..
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the fundamental block diagram for illustrating a kind of FPGA of the invention and adjusting；
Fig. 2 is the structural block diagram for illustrating a kind of FPGA of the invention and adjusting；
Fig. 3 is the temperature control flow figure for illustrating a kind of low-temperature heat control method based on FPGA of the invention；And
Fig. 4 is the flow chart for illustrating a kind of low-temperature heat control method based on FPGA of the invention.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The present invention provides a kind of low-temperature heat control method based on FPGA, should the low-temperature heat control method based on FPGA
Include:
Step 1, the temperature of display screen is acquired；
Step 2, according to the temperature of display screen collected, judge that the temperature is in continuously from down to high multiple temperature
A temperature range in section, each temperature range design a corresponding heating duty ratio；
Step 3, FPGA is heated according to the corresponding heating duty ratio of temperature of the acquisition to display screen.
According to the above technical scheme, this method of the present invention can directly lead in the case where not changing original hardware printed board
Software realization is crossed, the correcting cost of PCB is reduced, reduces the development cycle of product；Using the internal resource of FPGA, by upper
Machine is operated, and is realized convenient and simple；The range of heater material can largely be increased according to this method, improve product
The qualification rate of raw material；For algorithm independent of specific FPGA platform, transplanting is convenient, can realize in common FPGA platform,
Such as Xilinx, Altera, Lattice etc..
In the preferred embodiment of the present invention, in step 1, the method for acquiring the temperature of display screen includes:
The temperature for being acquired display screen respectively using first sensor and second sensor is out of order in first sensor detection
And in the normal situation of second sensor, using the temperature of second sensor acquisition as the temperature of display screen；In the second sensing
Device detection is out of order and in the normal situation of first sensor, using the temperature of first sensor acquisition as the temperature of display screen
Degree；In the case where first sensor and second sensor are all detected and be out of order, temperature collection reports an error without heating；First
Under sensor and all normal situation of second sensor, acquired with the temperature and second sensor of first sensor acquisition
The average value of temperature is the temperature of display screen.
By above-mentioned mode, multiple sensor may be implemented, and in the case where sensor error, display screen may be implemented
Temperature sense.
In the preferred embodiment of the present invention, in step 2, preset multiple temperature ranges may include:
First temperature range, first temperature range are less than or equal to subzero 30 DEG C；
Second temperature section, the second temperature section be greater than subzero 30 DEG C, and be less than or equal to subzero 20 DEG C；
Third temperature range, the third temperature range be more than or equal to subzero 20 DEG C, and be less than or equal to subzero 10 DEG C,
4th temperature range, the 4th temperature range are more than or equal to subzero 10 DEG C.
In above-mentioned flow chart, ht_data is thermal control signals of the output to heating control circuit, and data is depositing for reading
The fire data in module is stored up, X is a certain specific temperature under low temperature.
Assuming that X=-30 DEG C, the data of serial ports input are 70%, i.e. data=70%, then are controlled according to above-mentioned low-temperature heat
Flow chart obtains following computer heating control principle:
When PC is less than or equal to -30 DEG C, the ht_data of output is 70% to heating control circuit, after product heating, temperature
Rise；When PC is greater than -30 DEG C and is less than or equal to -20 DEG C, the PWM of output is 60% to heating control circuit, after product heating,
Temperature continues upper raw liter；When PC is greater than -20 DEG C and is less than or equal to -10 DEG C, the ht_data of output is 50% electric to computer heating control
The heating of road product.In this heating process, if product is in a certain low-temperature working environment, the temperature of PC can be in a certain temperature model
In enclosing, then the ht_data data exported are certain, and when the temperature of product is greater than -10 DEG C, product stops heating, i.e. ht_data
It is 0.
Such low-temperature heat control method based on FPGA does not need the difficulty and complexity that increase hardware, original hard
On part platform base, by modifying fpga logic algorithm, enhance the mutual backup functionality of temperature sensor.Permit in heating power
Under conditions of, and heating duty can be adjusted in real time than data, so that product reaches one most preferably at low temperature according to heating effect
Display effect.This method not will increase hardware Material Cost, increase only the logical resource of some FPGA controllers, will not be right
FPGA causes too big resource to bear.It is versatile, it can be transplanted between different FPGA platforms.It can greatly improve
The reliability and safety of display.
In the preferred embodiment of the present invention, in step 2,
The corresponding heating duty ratio of first temperature range is 70%；
The corresponding heating duty ratio in the second temperature section is 60%；
The corresponding heating duty ratio of the third temperature range is 50%；
The corresponding heating duty ratio of 4th temperature range is 0, does not execute heating.
In the preferred embodiment of the present invention, in step 2, each temperature range design one is corresponding
Heating duty ratio, and by the heating duty than carrying out power down preservation.
It is in step 2, heating duty ratio to be passed through into I in this embodiment2C bus is sent to E2In PROM.
As shown in Fig. 2, serial ports receiving module is mainly baud rate, check bit and the data format that basis is appointed, with
Host computer is communicated, and then receives the fire data that host computer sends over, the fire data received is exported to data
The fire data received is passed through I by memory module, data memory module2E is arrived in C bus, storage2In PROM, power down guarantor is carried out
It deposits, and the data in memory is exported to heating control module.
After heating control module receives the fire data of memory module and the PC temperature value of temperature collecting module, according to PC
Temperature handles fire data, heating control circuit flow chart as shown in figure 4, be then output to heating control circuit, with
Just the heating duty ratio after control low temperature powers on, by heated current control in the range required for us.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical solution of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (6)
1. a kind of low-temperature heat control method based on FPGA, which is characterized in that should the low-temperature heat control method based on FPGA
Include:
Step 1, the temperature of display screen is acquired；
Step 2, according to the temperature of display screen collected, judge that the temperature is in continuously from down to high multiple temperature ranges
In a temperature range, each temperature range designs a corresponding heating duty ratio；
Step 3, FPGA is heated according to the corresponding heating duty ratio of temperature of the acquisition to display screen.
2. the low-temperature heat control method according to claim 1 based on FPGA, which is characterized in that in step 1, acquisition
The method of the temperature of display screen includes:
The temperature for being acquired display screen respectively using first sensor and second sensor is out of order and the in first sensor detection
In the normal situation of two sensors, using the temperature of second sensor acquisition as the temperature of display screen；It is examined in second sensor
It measures in failure and the normal situation of first sensor, using the temperature of first sensor acquisition as the temperature of display screen；?
First sensor and second sensor all detect be out of order in the case where, temperature collection report an error without heating；In the first sensing
Under device and all normal situation of second sensor, with the temperature of the temperature of first sensor acquisition and second sensor acquisition
Average value be display screen temperature.
3. the low-temperature heat control method according to claim 1 based on FPGA, which is characterized in that in step 2, preset
Multiple temperature ranges include:
First temperature range, first temperature range are less than or equal to subzero 30 DEG C；
Second temperature section, the second temperature section be greater than subzero 30 DEG C, and be less than or equal to subzero 20 DEG C；
Third temperature range, the third temperature range be more than or equal to subzero 20 DEG C, and be less than or equal to subzero 10 DEG C,
4th temperature range, the 4th temperature range are more than or equal to subzero 10 DEG C.
4. the low-temperature heat control method according to claim 3 based on FPGA, which is characterized in that in step 2,
The corresponding heating duty ratio of first temperature range is 70%；
The corresponding heating duty ratio in the second temperature section is 60%；
The corresponding heating duty ratio of the third temperature range is 50%；
The corresponding heating duty ratio of 4th temperature range is 0, does not execute heating.
5. the low-temperature heat control method according to claim 1 based on FPGA, which is characterized in that in step 2, will be every
A temperature range all designs a corresponding heating duty ratio, and by the heating duty than carrying out power down preservation.
6. the low-temperature heat control method according to claim 5 based on FPGA, which is characterized in that in step 2, will add
Hot duty ratio passes through I2C bus is sent to E2In PROM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811473630.5A CN109375666A (en) | 2018-12-04 | 2018-12-04 | Low-temperature heat control method based on FPGA |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811473630.5A CN109375666A (en) | 2018-12-04 | 2018-12-04 | Low-temperature heat control method based on FPGA |
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| CN109375666A true CN109375666A (en) | 2019-02-22 |
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ID=65375629
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| CN201811473630.5A Pending CN109375666A (en) | 2018-12-04 | 2018-12-04 | Low-temperature heat control method based on FPGA |
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Citations (8)
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| CN101145058A (en) * | 2007-04-23 | 2008-03-19 | 中兴通讯股份有限公司 | Temperature regulation device and method thereof |
| CN201075184Y (en) * | 2007-08-31 | 2008-06-18 | 沈阳芯源微电子设备有限公司 | Intelligent hot tray temperature controller |
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| CN103606363A (en) * | 2013-12-04 | 2014-02-26 | 中航华东光电有限公司 | LCD type helmet display driving circuit based on FPGA |
| CN104765392A (en) * | 2015-03-24 | 2015-07-08 | 中航华东光电有限公司 | Heating control system, liquid crystal display module and heating control method |
| CN105318894A (en) * | 2015-12-08 | 2016-02-10 | 青岛歌尔声学科技有限公司 | Acquisition circuit of double sensors and electronic product with double sensors |
| CN105356880A (en) * | 2015-11-23 | 2016-02-24 | 南阳理工学院 | Circuit for collecting dual-path sensor data by utilizing one-path AD acquisition channel |
-
2018
- 2018-12-04 CN CN201811473630.5A patent/CN109375666A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101145058A (en) * | 2007-04-23 | 2008-03-19 | 中兴通讯股份有限公司 | Temperature regulation device and method thereof |
| CN201075184Y (en) * | 2007-08-31 | 2008-06-18 | 沈阳芯源微电子设备有限公司 | Intelligent hot tray temperature controller |
| CN102004505A (en) * | 2010-11-03 | 2011-04-06 | 中航华东光电有限公司 | Low-temperature heating control module and method for liquid crystal display |
| CN103188388A (en) * | 2011-12-30 | 2013-07-03 | 宇龙计算机通信科技(深圳)有限公司 | Mobile terminal and temperature adjusting method |
| CN103606363A (en) * | 2013-12-04 | 2014-02-26 | 中航华东光电有限公司 | LCD type helmet display driving circuit based on FPGA |
| CN104765392A (en) * | 2015-03-24 | 2015-07-08 | 中航华东光电有限公司 | Heating control system, liquid crystal display module and heating control method |
| CN105356880A (en) * | 2015-11-23 | 2016-02-24 | 南阳理工学院 | Circuit for collecting dual-path sensor data by utilizing one-path AD acquisition channel |
| CN105318894A (en) * | 2015-12-08 | 2016-02-10 | 青岛歌尔声学科技有限公司 | Acquisition circuit of double sensors and electronic product with double sensors |
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Application publication date: 20190222 |