CN102645938A - Real-time temperature control system of automobile brake block - Google Patents
Real-time temperature control system of automobile brake block Download PDFInfo
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- CN102645938A CN102645938A CN2012100956285A CN201210095628A CN102645938A CN 102645938 A CN102645938 A CN 102645938A CN 2012100956285 A CN2012100956285 A CN 2012100956285A CN 201210095628 A CN201210095628 A CN 201210095628A CN 102645938 A CN102645938 A CN 102645938A
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Abstract
The invention relates to a real-time temperature control system of an automobile brake block. The real-time temperature control system comprises a temperature detecting module, a temperature control module, a liquid level detecting module, a warning module and a cooling module, wherein the input end of the temperature detecting module is connected with the automobile brake block, the output end of the temperature detecting module is connected with the input end of the liquid level detecting module through the temperature control module, two output ends of the liquid level detecting module are respectively connected with the input ends of the cooling module and the warning module, the output end of the cooling module is connected to the automobile brake block, a temperature sensor arranged in the temperature detecting module is directly connected with an automobile power supply, the liquid level detecting module is used for detecting the water level of a water tank, when the water level of the water tank is lower than the set value, a warning device arranged in the warning module is triggered to warn, and a driver is reminded to note that the water level of the water tank is too low and cannot be used for cooling the brake block. The real-time temperature control system has the advantages that a cooling source is led from the automobile water tank, simplicity and reliability are realized, energy sources are saved, and the real-time temperature control system can be widely applied to the brake block of motive power machines such as automobiles, airplanes and the like.
Description
Technical field
The present invention relates to the clamping device of automobile, the real-time temperature control system of a kind of specifically automobile brake sheet.
Background technology
Present brake system all is to utilize the friction between the brake block to realize brake; But can produce a large amount of heat energy in the time of friction; Particularly when the more frequent apply the brakes of occasion of hill path driving and the stream of people, can produce great amount of heat and make brake block and tyre temperature raise rapidly, soften the too high brake block metal surface that causes of temperature, the friction factor reduction; Braking ability descends; When temperature rises in brake block and the tire safety work in limited time, just might make brake failure or blow out and cause irremediable property loss and personal injury, even the causing death.The basic reason that causes the brake block heat fading is the rising that the accumulation of heat causes its temperature; The domestic and international at present improvement that the research of this respect is mainly focused on the material enhancing ingredients is to improve its high temperature resistant property; And the research of special material will certainly bring bigger cost, can not well solve the heat fading problem.The real-time temperature control system of automobile brake sheet provided by the invention adopts radiator water directly to cool off brake block, and is simple to operation, can be widely used in the brake block of power machines such as automobile, aircraft.
Summary of the invention
The objective of the invention is to problem, provide a kind of automobile brake sheet real-time temperature control system, can detect the brake block temperature in real time to existing brake block cooling system existence, simple and reliable, energy savings.
In order to achieve the above object, design of the present invention is:
The present invention is a core with single chip computer AT 89C2051, comprises temperature detecting module, temperature control modules, Level Detection module, alarm module, refrigerating module etc.Temperature sensor in the temperature detecting module directly links to each other with automobile power source; The temperature signal that detection is obtained passes to single-chip microcomputer and carries out computing; And control and draw the electromagnetic valve switch on the cooling pipeline of radiator, when the temperature value of brake block surpasses settings, discharge the water cooling brake block.The Level Detection module is used to detect cistern water level, and when cistern water level was lower than setting value, alarm equipment alarm reminded that driver's cistern water level is too low to be not enough to be used to cool off brake block.
According to the foregoing invention design, the present invention adopts following technical proposals:
The real-time temperature control system of a kind of automobile brake sheet comprises temperature detecting module, temperature control modules, Level Detection module, alarm module, refrigerating module.The temperature detecting module input end connects automobile brake sheet; And output terminal is connected to the input end of Level Detection module through temperature control modules; Two output terminals of Level Detection module are connected respectively to the input end of refrigerating module and alarm module; The output terminal of refrigerating module is connected to automobile brake sheet, and refrigerating module is a radiator; In the temperature detecting module temperature sensor directly link to each other with automobile power source; The single-chip microcomputer that the temperature signal that detection is obtained passes in the temperature control modules carries out computing; And the electromagnetic valve switch on the cooling pipeline of radiator is drawn in control; When the temperature value of automobile brake sheet surpasses settings, discharge the water cooling automobile brake sheet; The Level Detection module is used to detect cistern water level, when cistern water level is lower than setting value, touches the alarm equipment alarm in the alarm module, reminds that driver's cistern water level is too low to be not enough to be used to cool off brake block.
Each forms module and function declaration is following:
1, temperature detecting module
Temperature detecting module adopts temperature sensor MAX6577.MAX6577 is the digital temperature sensor of the output frequency signal of MAXIM production.Its output duty cycle is 1/2 square wave, and its frequency is proportional to absolute temperature.Select to fit the frequency/temperature proportionality constant of record through pin TS0, TS1, measure frequency by the internal counter of microprocessor again after, calculate back thermometric degree.
MAX6577 adopts the SOT-6 encapsulation, and its pin distributes as shown in Figure 2.
This chip is that frequency is to be prerequisite with absolute temperature (K) with temperature transition, therefore to the count results of frequency should deduct 273 just can obtain two kinds of temperature metas of degree centigrade MAX6577 reduction formula be:
2, temperature control modules
The core of temperature control modules is single chip computer AT 89C2051, and this also is the core of whole temperature control system.T89C2051 is 8 single-chip microcomputers of low-voltage, high-performance CMOS that American ATMEL is produced; Sheet include 2k bytes can be erasable repeatedly read-only program memory (PEROM) and the random data storer (RAM) of 128bytes; Device adopts high density, the nonvolatile storage technologies production of atmel corp; Compatibility standard MCS-51 order set, 8 central processing units of sheet built-in general-purpose and Flash storage unit, its pin distributes as shown in Figure 3.Main pin function is following:
Temperature-control circuit schematic diagram general thought as shown in Figure 4 is that the TO of employing single-chip microcomputer is the counter works mode; T1 is the timing working mode; Be the numerical value that counts the T0 counting after every 1S timing arrives; Here it is current MAX6577 is with the frequency numerical value of temperature transition, and deducting 273 to the count value of statistics is exactly Celsius temperature.Relatively the Current Temperatures and the design temperature upper limit need to determine whether cooling.Fig. 5 is temperature control and temperature detecting module program flow chart.
3, Level Detection module
The Level Detection module adopts chip CD4060, and connects a measured capacitance.Tested liquid level variation causes the variation of measured capacitance, thereby the frequency that causes the CD4060 oscillator changes.The pin of CD4060 distributes as shown in Figure 6
Tested level change causes the variation of measured capacitance, thereby causes that CD4060 oscillator frequency (or cycle) changes.Because its rate of change is too fast for single-chip microcomputer, therefore at first oscillator signal is carried out frequency division and handle, the middle fracture INTO that the square-wave signal behind the frequency division (cycle is T) is sent single-chip microcomputer to makes exterior interrupt.When the square wave negative edge arrives; Single-chip microcomputer starts timer and begins numeration, and when next negative edge arrives (one-period behind the frequency division), single-chip microcomputer is delivered counter value to operation processing program and gone to calculate liquid level h value; Compare with program setting minimum liquid level value, detect thereby accomplish.
4, alarm module
When cistern water level was lower than setting value, alarm equipment alarm reminded that driver's cistern water level is too low to be not enough to be used to cool off brake block.
5, refrigerating module
The refrigerating module cooling source is directly taken from radiator, economizes on resources.
Timer interrupts TO has two tasks, on the one hand, in the measuring liquid level process in order to timing, according to twice external interrupt INTO at interval in timer interrupt the number of times that gets into, the signal period T behind the calculating frequency division; On the other hand in monitoring temperature in order to regularly, produces No. 20 timers and interrupted just regularly 1 second, the frequency signal that in this second, MAX6577 is produced counting, whether calculate current brake block temperature needs to cool off in order to decision-making.Interrupt over getting into which kind of state and whether being, over only survey liquid level when interrupting, measure when closing outside the interruption and the control cooling procedure.
The present invention compared with prior art; Have following conspicuous substantive distinguishing features and advantage: the present invention is core with AT89C2051; Not only can detect the temperature of brake block in real time; And can utilize the water tank water source that brake block is cooled off, and simple to operation and economize on resources, can be widely used in the brake block of power machines such as automobile, aircraft.
Description of drawings
Fig. 1 is a composition frame chart of the present invention.
Fig. 2 is the MAX6577 pinouts
Fig. 3 is the AT89C2051 pinouts
Fig. 4 is the temperature-control circuit schematic diagram
Fig. 5 is temperature control and detection module flow chart
Fig. 6 is the CD4060 pinouts
Fig. 7 is the overall circuit schematic diagram
Fig. 8 is the overall system process flow diagram.
Embodiment
The preferred embodiments of the present invention accompanying drawings is following:
Embodiment one:
Referring to Fig. 1, the real-time temperature control system of this automobile brake sheet comprises temperature detecting module, temperature control modules, Level Detection module, alarm module, refrigerating module.The temperature detecting module input end connects automobile brake sheet; And output terminal is connected to the input end of Level Detection module through temperature control modules; Two output terminals of Level Detection module are connected respectively to the input end of refrigerating module and alarm module; The output terminal of refrigerating module is connected to automobile brake sheet, and refrigerating module is a radiator; In the temperature detecting module temperature sensor directly link to each other with automobile power source; The single-chip microcomputer that the temperature signal that detection is obtained passes in the temperature control modules carries out computing; And the electromagnetic valve switch on the cooling pipeline of radiator is drawn in control; When the temperature value of automobile brake sheet surpasses settings, discharge the water cooling automobile brake sheet; The Level Detection module is used to detect cistern water level, when cistern water level is lower than setting value, touches the alarm equipment alarm in the alarm module, reminds that driver's cistern water level is too low to be not enough to be used to cool off brake block.
Embodiment two:
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, present embodiment is identical with embodiment one, and special wound part is following: said temperature detecting module adopts TEMP chip MAX6577; MAX6577 is the digital temperature sensor of the output frequency signal of MAXIM production, and its output duty cycle is 1/2 square wave, and its frequency is proportional to absolute temperature; Select suitable frequency/temperature proportionality constant through this TEMP pin of chip TS0, TS1, measure frequency by the internal counter of single-chip microcomputer in the temperature control modules again after, calculate dut temperature.
Said temperature control modules adopts single chip computer AT 89C2051 to handle the detected temperature signal of said digital temperature sensor; AT89C2051 is 8 single-chip microcomputers of low-voltage, high-performance CMOS that American ATMEL is produced; Sheet include 2k bytes can be erasable repeatedly read-only program memory PEROM and the random data memory RAM of 128bytes; Device adopts high density, the nonvolatile storage technologies production of atmel corp; Compatibility standard MCS-51 order set, 8 central processing units of sheet built-in general-purpose and Flash storage unit, the AT89C2051 single-chip microcomputer is widely used in electronic product.
Said Level Detection module adopts chip CD4060, and connects a measured capacitance; The tested liquid level variation of radiator causes the variation of measured capacitance, thereby the frequency that causes the CD4060 oscillator changes; The CD4060 change of frequency is too fast, and an external frequency dividing circuit links to each other with single-chip microcomputer again.
Said refrigerating module is a radiator, economizes on resources.
The power supply of each module directly draws from automobile power source, and saves the A/D conversion, and is simple to operation.
Embodiment three:
The real-time temperature control system of this automobile brake sheet comprises temperature detecting module, temperature control modules, Level Detection module, alarm module, refrigerating module etc.The circuit system schematic diagram is as shown in Figure 7, and overview flow chart is as shown in Figure 8.
In order to economize on resources, to reduce cost and simplifying installation process, cooling source is directly taken from water tank, and power supply is taken from automobile power source.As shown in Figure 7; Native system is a core with single chip computer AT 89C2051, the treatment temperature signal, and temperature sensor MAX6577 is used for detected temperatures; CD4060 is used to detect high water tank to be changed; Connect a measured capacitance, tested level change causes the variation of measured capacitance, thereby causes that CD4060 oscillator frequency (or cycle) changes.Because its rate of change is too fast for single-chip microcomputer, therefore at first oscillator signal is carried out frequency division and handle.Signal behind the frequency division passes to single-chip microcomputer and carries out temperature control, and whether control water tank solenoid valve need cool off brake block with decision.
The concrete course of work, as shown in Figure 8, the T0 counting is set; The T1 timing; When second time during external interrupt, according to twice external interrupt INTO at interval in the timer number of times that interrupts entering, single-chip microcomputer is delivered counter value to operation processing program and is gone to calculate liquid level h value; Compare with program setting minimum liquid level value, detect thereby accomplish.When liquid level was lower than the minimum liquid level value, alarm equipment alarm also added water to water tank, closed outside the interruption then; When liquid level is higher than the minimum liquid level value, directly close outside the interruption.Close and turn to temperature control, cooling procedure after the external interrupt, the T1 timing is 1s, counts the numerical value of T0 counting, and Here it is current MAX6577 is with the frequency numerical value of temperature transition, and deducting 273 to the count value of adding up is exactly Celsius temperature.Relatively the Current Temperatures and the design temperature upper limit need to determine whether cooling, and P1.6 puts 1 opens solenoid valve when needing cooling, and cooling directly discharges water; In the time of need not cooling off, P1.6 puts 0 and closes solenoid valve, and over interrupt, begin next Level Detection.
Claims (6)
1. the real-time temperature control system of automobile brake sheet comprises temperature detecting module (2), temperature control modules (3), Level Detection module (4), alarm module (6), refrigerating module (5); It is characterized in that: temperature detecting module (2) input end connects automobile brake sheet (1); And output terminal is connected to the input end of Level Detection module (4) through temperature control modules (3); Two output terminals of Level Detection module (4) are connected respectively to the input end of refrigerating module (5) and alarm module (6); The output terminal of refrigerating module (5) is connected to automobile brake sheet (1), and refrigerating module (5) is a radiator; In the said temperature detecting module (2) temperature sensor directly link to each other with automobile power source; The single-chip microcomputer that the temperature signal that detection is obtained passes in the temperature control modules (3) carries out computing; And the electromagnetic valve switch on the cooling pipeline of radiator is drawn in control; When the temperature value of automobile brake sheet (1) surpasses settings, discharge water cooling automobile brake sheet (1); Level Detection module (4) is used to detect cistern water level, when cistern water level is lower than setting value, touches the alarm equipment alarm in the alarm module (6), reminds that driver's cistern water level is too low to be not enough to be used to cool off brake block.
2. the real-time temperature control system of automobile brake sheet according to claim 1 is characterized in that: said temperature detecting module (2) adopts TEMP chip MAX6577; MAX6577 is the digital temperature sensor of the output frequency signal of MAXIM production, and its output duty cycle is 1/2 square wave, and its frequency is proportional to absolute temperature; Select suitable frequency/temperature proportionality constant through this TEMP pin of chip TS0, TS1, measure frequency by the internal counter of single-chip microcomputer in the temperature control modules (3) again after, calculate dut temperature.
3. the real-time temperature control system of automobile brake sheet according to claim 1 is characterized in that: said temperature control modules (2) adopts single chip computer AT 89C2051 to handle the detected temperature signal of said digital temperature sensor; AT89C2051 is 8 single-chip microcomputers of low-voltage, high-performance CMOS that American ATMEL is produced; Sheet include 2k bytes can be erasable repeatedly read-only program memory PEROM and the random data memory RAM of 128bytes; Device adopts high density, the nonvolatile storage technologies production of atmel corp; Compatibility standard MCS-51 order set, 8 central processing units of sheet built-in general-purpose and Flash storage unit, the AT89C2051 single-chip microcomputer is widely used in electronic product.
4. the real-time temperature control system of automobile brake sheet according to claim 1 is characterized in that: said Level Detection module (4) adopts chip CD4060, and connects a measured capacitance; The tested liquid level variation of radiator causes the variation of measured capacitance, thereby the frequency that causes the CD4060 oscillator changes; The CD4060 change of frequency is too fast, and an external frequency dividing circuit links to each other with single-chip microcomputer again.
5. the real-time temperature control system of automobile brake sheet according to claim 1 is characterized in that: said refrigerating module (5) is a radiator, economizes on resources.
6. the real-time temperature control system of automobile brake sheet according to claim 1, it is characterized in that: the power supply of each module directly draws from automobile power source, and saves the A/D conversion, and is simple to operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100956285A CN102645938A (en) | 2012-04-01 | 2012-04-01 | Real-time temperature control system of automobile brake block |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100956285A CN102645938A (en) | 2012-04-01 | 2012-04-01 | Real-time temperature control system of automobile brake block |
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| CN102645938A true CN102645938A (en) | 2012-08-22 |
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| CN2012100956285A Pending CN102645938A (en) | 2012-04-01 | 2012-04-01 | Real-time temperature control system of automobile brake block |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106525452A (en) * | 2016-11-17 | 2017-03-22 | 安徽江淮汽车集团股份有限公司 | Method and system for testing heat fading performance |
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| CN201410943Y (en) * | 2009-06-25 | 2010-02-24 | 南京信息工程大学 | Brake system temperature automatic control device |
| WO2012015669A1 (en) * | 2010-07-29 | 2012-02-02 | Equalaire System, Inc. | Steer axle high-temperature warning system |
| US20120032793A1 (en) * | 2010-07-30 | 2012-02-09 | Frank Joseph Sonzala | Visual wheel end assembly high-temperature warning system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106525452A (en) * | 2016-11-17 | 2017-03-22 | 安徽江淮汽车集团股份有限公司 | Method and system for testing heat fading performance |
| CN106525452B (en) * | 2016-11-17 | 2019-05-28 | 安徽江淮汽车集团股份有限公司 | The test method and test macro of character of heat-fading energy |
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Application publication date: 20120822 |