CN103488211A - Intelligent machine box temperature control system and method - Google Patents
Intelligent machine box temperature control system and method Download PDFInfo
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Abstract
The invention provides an intelligent machine box temperature control system and method based on a single chip microcomputer. The machine box temperature control system comprises the single chip microcomputer, a temperature sensor inside a machine box, a temperature sensor outside the machine box, a fan and a fan operating drive circuit. The temperature value sensed by the two temperature sensors is output to the single chip microcomputer. The single chip microcomputer comprises a fan low-speed operating control terminal and a fan high-speed operating control terminal which are respectively connected to the fan operating drive circuit, and the fan operating drive circuit controls the fan to be in a high-speed operating state, or a low-speed operating state or an operating stopping state based on a control signal of the single chip microcomputer. The temperature inside the machine box and the temperature condition of the environment where the machine box is located are fully taken into consideration, and a temperature control strategy capable of fully taking the temperature environment inside the machine box and the temperature environment outside the machine box into consideration is provided in an innovated mode, so that the machine box works under the ideal temperature condition continuously, the temperature control efficiency is improved, and the electric energy consumption of the fan is effectively reduced.
Description
Technical field
The present invention relates to domain of control temperature, relate to more specifically a kind of SCM Based system for controlling case temperature and method.
Background technology
Traditional cabinet is directly to utilize power supply to power to fan as the temperature of computer housing is controlled, and fan often transfers the temperature of controlling cabinet, so not only is difficult to the temperature of cabinet is reached to control accurately, and can causes the larger waste of electric energy.In prior art sometimes in order to reduce noise, also adopt adjustable rheostat to regulate the rotating speed of fan, but the rotating speed of fan is not also controlled in this artificial adjusting according to the actual temperature of cabinet, within can't the temperature in cabinet being controlled to ideal range according to actual environment.Also have in prior art by set temperature sensor in cabinet and detect the temperature in cabinet, and control fan running to reach the technology of desirable cooling effect according to this testing result, but this temperature sensor often is arranged at the ad-hoc location in cabinet, the operation of the simple detection Numerical Control fan according to temperature sensor, do not consider the temperature conditions of cabinet environment of living in, even such as the heat generating components in the summer cabinet in the off-duty state, because of environment temperature higher, the temperature value that this temperature in chassis sensor detects also may reach fan operation unlocking condition, cause the waste of electric energy, and in cold winter, although heater element is awfully hot, but the natural convection because of circumstance of temperature difference, the temperature value that the temperature in chassis sensor senses is on the low side may not reach fan open temp condition, cause heater element to be damaged by heat, therefore in prior art when the temperature of the cabinet to containing heater element is controlled, do not reach the effect of accurate controller the temperature inside the box, affected the normal operation of heater element, and caused to a certain extent the waste of electric energy.
Summary of the invention
The present invention is for solving the problems of the technologies described above, a kind of SCM Based intelligentized housing temperature automatic control system and method are proposed, the temperature of cabinet inside and the temperature conditions of cabinet environment of living in have been taken into full account, two temperature sensors have been introduced, and the numerical relation analysis to the sensor detected temperatures by single-chip microcomputer, a kind of temperature control strategy that can consider cabinet internal and external temperature environment of proposition of innovation, and then make the desirable temperature conditions that works in that described cabinet can be lasting, improved the temperature control efficiency, effectively reduce the fan power consumption, and the serviceable life of having improved heater element.
It is as follows that the present invention solves the problems of the technologies described above taked technical scheme:
A kind of housing temperature intelligent control system, comprise single-chip microcomputer, temperature in chassis sensor, the outer temperature sensor of cabinet, fan and fan operation driving circuit, the temperature value of two temperature sensor senses is exported to single-chip microcomputer, described single-chip microcomputer comprises fan low-speed running control end and the fan control end that runs up, be connected to fan operation driving circuit, the SCM Based control signal of described fan operation driving circuit control fan in running up, low-speed running or the state that shuts down.
Further according to housing temperature intelligent control system of the present invention, wherein said fan operation driving circuit comprises divider resistance, voltage source V CC and four transistors, the fan low-speed running control end of described single-chip microcomputer is connected in the base stage of first crystal triode, the collector of first crystal triode is connected in voltage source V CC, the emitter of first crystal triode is connected in the base stage of the 3rd transistor, the collector of the 3rd transistor is connected in fan one end through divider resistance, the grounded emitter of the 3rd transistor, the other end of fan is connected in described voltage source V CC, the fan of the described single-chip microcomputer control end that runs up is connected in the base stage of the second transistor, the collector of the second transistor is connected in described voltage source V CC, the emitter of the second transistor is connected in the base stage of the 4th transistor, the collector of the 4th transistor is connected in an end of described fan, the grounded emitter of the 4th transistor.
Further according to housing temperature intelligent control system of the present invention, wherein also comprise digital pipe driving chip and charactron, described digital pipe driving chip is connected in the temperature show state output terminal of single-chip microcomputer, described charactron is connected in digital pipe driving chip, for temperature in chassis and the cabinet external environment temperature of displays temperature sensor sensing.
Further according to housing temperature intelligent control system of the present invention, wherein the base terminal of above-mentioned four transistors all is connected with resistance, and four transistors are the NPN transistor, described first crystal triode and the second transistor are the miniwatt transistor, the quantity of described fan is two, and parallel with one another being arranged in cabinet.
Further according to housing temperature intelligent control system of the present invention, prestore the fan work temperature look-up table of standard in wherein said single-chip microcomputer, described fan work temperature look-up table provides under various cabinet external environment temperature values, corresponding to the temperature in chassis value condition of the various running statuses of fan, specifically comprise that fan cuts out operating temperature condition, fan low-speed running open temp condition, fan closing temperature condition and the fan open temp condition that runs up that runs up.
Further according to housing temperature intelligent control system of the present invention, wherein when the temperature of described temperature sensor senses meets described fan low-speed running open temp condition, the fan low-speed running control end output high level signal of described single-chip microcomputer, the fan control end output low level signal that runs up, when the temperature of described temperature sensor senses meets described fan and runs up the open temp condition, the fan of the described single-chip microcomputer control end output high level signal that runs up, fan low-speed running control end output low level signal, when the temperature of described temperature sensor senses meets described fan and runs up the closing temperature condition, the fan low-speed running control end output high level signal of described single-chip microcomputer, the fan control end output low level signal that runs up, when the temperature of described temperature sensor senses meets described fan and closes the operating temperature condition, the fan low-speed running control end of described single-chip microcomputer and the fan equal output low level signal of control end that runs up.
Further according to housing temperature intelligent control system of the present invention, wherein said single-chip microcomputer comprises low-pass filter, fan control module and fault detection module, described low-pass filter carries out exporting to respectively fan control module and fault detection module after the filtering processing to the temperature data of temperature sensor input, described fan control module generates and exports the control signal of fan running status based on temperature data, described fault detection module is carried out fault verification based on temperature data, when it exports fault-signal to fan control module, fan control module generates and exports the fan control signal that runs up.
Further according to housing temperature intelligent control system of the present invention, wherein said temperature sensor model is DS18B20, described single-chip microcomputer model is STC89C516RD+, the miniwatt transistor that described first crystal triode and the second transistor are the S9013 model, described the 3rd transistor and the 4th transistor are the TIP122 transistor.
A kind of intelligent control method of housing temperature, described intelligent control method carries out based on the described housing temperature intelligent control system of one of technique scheme, prestore the fan work temperature look-up table of standard in the single-chip microcomputer that described housing temperature intelligent control system comprises, described fan work temperature look-up table provides under various cabinet external environment temperature values, temperature in chassis value condition corresponding to the desirable running status of fan, comprise that fan cuts out operating temperature value condition, fan low-speed running open temp value condition, fan closing temperature value condition and the fan open temp value condition that runs up that runs up, described intelligent control method comprises the following steps:
(1), the ambient temperature value T_exp of single-chip microcomputer reading machine box outside temperature sensor sensing, and extract the cabinet internal standard temperature value T1, the cabinet internal standard temperature value T2 that opens the fan low-speed running that close fan running according to this ambient temperature value T_exp in described fan work temperature look-up table, close the cabinet internal standard temperature value T3 that fan runs up and open the cabinet internal standard temperature value T4 that fan runs up;
(2), the temperature in chassis value T_in of single-chip microcomputer reading machine the temperature inside the box sensor sensing, and control fan in low speed, high speed or run-stopping status based on this temperature in chassis value T_in with corresponding to the relation between the described cabinet internal standard temperature value T1 of the desirable running status of fan, T2, T3, T4.
Further, according to intelligent control method of the present invention, the pass between wherein said cabinet internal standard temperature value T1, T2, T3, T4 is T1<T2<T3<T4, and described step (2) is further comprising the steps:
A, when temperature in chassis value T_in is more than or equal to cabinet internal standard temperature value T2 and be less than cabinet internal standard temperature value T4, Single-chip Controlling fan low-speed running;
B, when temperature in chassis value T_in is less than or equal to cabinet internal standard temperature value T1, the Single-chip Controlling fan stops
Only running;
C, be greater than cabinet internal standard temperature value T1 and be less than cabinet internal standard temperature value as temperature in chassis value T_in
During T2, the running status of fan before single-chip microcomputer keeps;
D, when temperature in chassis value T_in is more than or equal to cabinet internal standard temperature value T4, the Single-chip Controlling fan is high
Speed running, until the temperature in chassis value T_in read is while being less than or equal to cabinet internal standard temperature value T3, the Single-chip Controlling fan switches to the low-speed running state by the state of running up.
Further, according to intelligent control method of the present invention, wherein also comprise failure detection steps, the cabinet external environment temperature value T_exp detected when described temperature sensor or temperature in chassis value T_in occur that when abnormal, the Single-chip Controlling fan runs up.
At least can reach following technique effect by technical scheme of the present invention:
1), by two temperature sensors, detect the temperature conditions inside and outside cabinet, improved the temperature control precision in cabinet simultaneously, guaranteed that heating element in computer housing runs on the ideal temperature condition.
2), by dynamically adjusting the operation of fan, improved the actual cooling effectiveness to cabinet, the possibility of having avoided the electronic component heating to damage.
3), with respect to traditional type of cooling, effectively reduced the use consumption to cooling electric energy, reached energy-conservation purpose.
The accompanying drawing explanation
The circuit structure schematic diagram that accompanying drawing 1 is housing temperature intelligent control system of the present invention;
Accompanying drawing 2 is fan work temperature look-up table default in housing temperature intelligent control method of the present invention;
The control module structure that accompanying drawing 3 comprises for single-chip microcomputer in housing temperature intelligent control system of the present invention;
Accompanying drawing 4 is for being used housing temperature intelligent control method of the present invention to carry out temperature controlled example test pattern.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in detail, so that those skilled in the art can more clearly understand the solution of the present invention, but does not therefore limit the scope of the invention.
As shown in Figure 1, housing temperature intelligent control system provided by the present invention comprises single-chip microcomputer, two temperature sensors, charactron, digital pipe driving chip, some resistance, four transistors (NPN:S9013_1, S9013_2, TIP122_1, TIP122_2) and two fans (F1, F2).Wherein the output terminal of two temperature sensors connects single-chip microcomputer, to described single-chip microcomputer input temp sensing signal, one of them temperature sensor is installed on cabinet inside, preferably near main heater element, for real-time sensing cabinet inside temperature, another temperature sensor is installed on the cabinet outside, and for sensing cabinet ambient temperature accurately in real time, the model of two temperature sensors is preferably DS18B20.The temperature show state output terminal (P0.0-P0.7 port) of described single-chip microcomputer connects described digital pipe driving chip, described digital pipe driving chip is the 74HC573 chip, its output terminal connects described charactron, and described charactron is for temperature in chassis and the cabinet external environment temperature value of displays temperature sensor sensing.Described single-chip microcomputer is preferably the STC89C516RD+ single-chip microcomputer, the signal that two temperature sensor T_in of its reception and T_exp transmit, after the internal processes analyzing and processing, (be discussed in more detail below), the output state that determines its control signal output terminal B_low (P1.0 terminal) and B_high (P1.1 terminal) is 0 or 1, wherein the B_low signal output part of single-chip microcomputer is connected in the base stage of transistor S9013_1 through resistance R 1, the collector of transistor S9013_1 is connected in voltage source V CC, the emitter of transistor S9013_1 is connected in the base stage of transistor TIP122_1 through resistance R 3, the collector of transistor TIP122_1 is connected in an end of two fans in parallel and the collector of transistor TIP122_2 through divider resistance R4, the grounded emitter of transistor TIP122_1, the B_high signal output part of single-chip microcomputer is connected in the base stage of transistor S9013_2 through resistance R 2, the collector of transistor S9013_2 is connected in described voltage source V CC, the emitter of transistor S9013_2 is connected in the base stage of transistor TIP122_2 through resistance R 5, the collector of transistor TIP122_2 is connected in two fans in parallel and resistance R 4, the grounded emitter of transistor TIP122_2.Described two fan F1, F2 are connected in parallel, an end in parallel is connected in described voltage source V CC, the other end in parallel is connected in the collector of described resistance R 4 and transistor TIP122_2 as mentioned above, above-mentioned two fans preferably are fixed on cabinet top (quantity can arrange as required), exhaust outward during rotation, adopt two 12V DC fan.Transistor S9013_1 and transistor S9013_2 are the S9013 low-power transistor, and transistor TIP122_1 and transistor TIP122_2 are the TIP122 transistor.When the program of single-chip microcomputer determines when the first two fan should slowly run, its B_low signal output part output high level signal " 1 " is B_low=1, now micro-electric current of single-chip microcomputer pin flows into the base stage of transistor S9013_1 through resistance R 1, the S9013_1 conducting, the little electric current flowed out by the emitter of S9013_1 enters the base stage of transistor TIP122_1 through current-limiting resistance R3, the TIP122_1 conducting, large electric current is through VCC → fan F1/F2 → resistance R 4 → TIP122_1 → ground, fan F1 and F2 rotate, but the current limliting dividing potential drop effect due to resistance R 4, voltage source V CC only some voltage acts on fan F1 and F2, now F1 and F2 are not full-speed operation, and in the low-speed running state.Program when single-chip microcomputer inside determines as the first two fan F1, when F2 answers high-speed rotation, its B_high signal output part output high level signal " 1 " is B_high=1, now micro-electric current of single-chip microcomputer pin flows into transistor S9013_2 base stage through resistance R 2, the S9013_2 conducting, the little electric current flowed out by the emitter of S9013_2 enters the base stage of TIP122_2 through current-limiting resistance R5, the TIP122_2 conducting, large electric current is through voltage source V CC → fan F1/F2 → TIP122_2 → ground, fan F1 and F2 rotate, now the voltage of voltage source V CC almost all acts on fan F1 and F2, now F1 and F2 run up.Here the control signal output terminal B_low of single-chip microcomputer has used respectively two different triodes of power to carry out the secondary amplification with B_high, sufficient electric current is arranged while having guaranteed two fan runnings, can pass through the triode of larger electric current because afterbody (TIP122) adopts simultaneously, effectively reduce the working temperature of triode.
After the sensing signal of single-chip microcomputer of the present invention like this based on temperature sensor carries out inner process analysis processing, controlling two fans by output low and high level signal works in the low-speed running state simultaneously and still works in the state of running up simultaneously, when sensor-based detection signal is determined while need to strengthen refrigeration to heater element, its B_high end output high level of Single-chip Controlling can make two fans run up, when sensor-based detection signal is determined while to heater element, only needing common refrigeration to get final product, its B_low end output high level of Single-chip Controlling can make two fan low-speed runnings.Therefore by the circuit system structure shown in accompanying drawing 1 of the present invention, as long as in single-chip microcomputer, set the temperature intelligent control strategy how the signal intelligent based on temperature sensor control the duty of fan, can reach the Based Intelligent Control to housing temperature, make heater element work in desirable temperature environment.
Below 2-4 is by reference to the accompanying drawings carried out the Intelligent Control Strategy of detailed explanation housing temperature of the present invention.In order to narrate conveniently, the temperature of supposing the cabinet inside of the temperature sensor senses in cabinet is T_in, the temperature of the cabinet environment of living in of cabinet external environment temperature sensor senses is T_exp, single-chip microcomputer STC89C516RD+ reads respectively sensing temperature T_in and the T_exp of two temperature sensors, and the control charactron shows its temperature value, prestore the fan work temperature look-up table under standard state in single-chip microcomputer, after single-chip microcomputer is compared the fan work temperature look-up table of the T_in that reads and T_exp temperature value and Qi Nei storage to judge, determine that two fans are static, slowly run or high-speed rotation.
In concrete single-chip microcomputer, the fan work temperature look-up table of storage as shown in Figure 2, it has provided ambient temperature value, ideal relationship between temperature in chassis value and fan service condition, the concrete temperature in chassis value condition provided under each ambient temperature value corresponding to the various desirable running statuses of fan, wherein the horizontal ordinate representative is environment temperature, what ordinate represented is temperature in chassis, curve LowOn means fan low speed unlocking condition, curve LowOff means that fan low speed closes condition, curve HighOn means fan high speed unlocking condition, curve HighOff means that fan cuts out at a high speed condition, four curves mean that fan cuts out the operating temperature condition from bottom to top successively, fan low-speed running open temp condition, fan closing temperature condition and the fan open temp condition that runs up that runs up.
The visible difference along with environment temperature, the temperature in chassis value that determines fan operating state is also not identical, thereby can consider fully that by this default fan work temperature look-up table environment temperature decides the refrigeration condition in cabinet, has avoided the problem in the background technology.The detailed process that the temperature value of described single-chip microcomputer based on said fans working temperature question blank and temperature sensor actual sensed controlled the running status of fan is as follows:
At first, single-chip microcomputer reads the temperature value T_exp of the cabinet environment of living in of environment temperature sensor senses, and search the position of this temperature value T_exp on its horizontal ordinate in the fan work temperature look-up table prestored therein, then extract following Temperature numerical condition (the corresponding LowOn curve of horizontal ordinate T_exp temperature value in the fan work temperature look-up table according to this positional information, the LowOff curve, the ordinate temperature value of HighOn curve and HighOff curve): the cabinet internal standard temperature value T1 that closes fan running, open the cabinet internal standard temperature value T2 of fan low-speed running, close the cabinet internal standard temperature value T3 that fan runs up, open the cabinet internal standard temperature value T4 that fan runs up, preferred T1<T2<T3<T4.
Then, the temperature in chassis value T_in of single-chip microcomputer reading machine the temperature inside the box sensor sensing, and according to the relation between T_in temperature value and said temperature value conditions T1, T2, T3, T4, the fan running status is controlled as follows:
(1) when temperature in chassis value T_in is more than or equal to T2 and is less than T4, the control signal of single-chip microcomputer output fan low-speed running is B_low=1, and B_high=0, control fan and turned round with lower-speed state;
(2) when temperature in chassis value T_in is less than or equal to T1, the control signal that fan running is closed in single-chip microcomputer output is B_low=0, and B_high=0 controls fan and shuts down, and remains static;
(3) when temperature in chassis value T_in is greater than T1 and is less than T2, single-chip microcomputer is left intact, the running status of fan before keeping;
(4) when temperature in chassis value T_in is more than or equal to T4, the control signal that single-chip microcomputer output fan runs up is B_low=0, B_high=1, control fan and turned round with fast state, and keep this B_low=0 always, the control signal output of B_high=1, until the temperature in chassis value T_in read is while being less than or equal to T3, output control signal B_low=1, B_high=0, switch to the low-speed running state by fan by the state of running up.
Described single-chip microcomputer of a certain moment is controlled one of in the manner described above the running of described fan, in conjunction with described fan work temperature look-up table, following representative temperature condition value is provided: when environment temperature is between-40 ℃ to 0 ℃, described T1=23 ℃, T2=27 ℃, T3=28 ℃, T4=30 ℃; When environment temperature is 10 ℃, described T1=24 ℃, T2=28 ℃, T3=29 ℃, T4=31 ℃; When environment temperature is 20 ℃, described T1=25 ℃, T2=29 ℃, T3=30 ℃, T4=32 ℃; When environment temperature is 30 ℃, described T1=32 ℃, T2=35 ℃, T3=36 ℃, T4=38 ℃; When environment temperature is 40 ℃, described T1=37 ℃, T2=38 ℃, T3=39 ℃, T4=41 ℃.Temperature spot for other is also controlled in a similar fashion.Said fans working temperature question blank has adopted preset value, and this is the canonical reference value that can be applicable to most of cabinet stable operations that test obtains according to several times.
In addition in order further to guarantee temperature control effect, also be provided with fault detection mechanism in above-mentioned single-chip microcomputer, the single-chip microcomputer output fan control signal B_low=0 that runs up when breaking down, B_high=1, this fault detection mechanism is realized by fault detection module, concrete decision procedure is: the temperature value of one of two temperature sensors sensing departs from default normal range, perhaps the temperature gap of two temperature sensor senses surpasses preset range, perhaps the housing temperature ascending velocity of temperature sensor senses is too fast exceeds preset range or other job failure appears in temperature sensor, etc., fault detection module in single-chip microcomputer is to fan control module output fault-signal B_err=1 in this case, when fan control module receives the signal of B_err=1, control B_low=0, B_high=1 runs up fan.
Preferably, be applied in the present invention
single-chip microcomputer STC89C516RD+(temperature control system control strategy sketch) as shown in Figure 3: comprise low-pass filter, fan control module and fault detection module, wherein the temperature data T_in of two temperature sensor inputs and T_exp first carry out filtering through low-pass filter, prevent that temperature sensor signal from causing the abnormal start-stop of fan because interference causes jitter, temperature sensor data after processing are after filtering exported to respectively fan control module and fault detection module, and realize the temperature control strategy of above-mentioned key and export corresponding control signal B_low and B_high in fan control module, and temperature data T_in and the T_exp of fault detection module based on temperature sensor senses carries out fault verification, as whether this temperature value T_in or T_exp or its difference depart from default normal range, whether the T_in ascending velocity is too fast etc., when relatively breaking down with preset value, it is to fan control module output fault-signal B_err=1, when receiving this signal, fan control module directly controls B_low=0, B_high=1 runs up fan, the simultaneous faults detection module is to malfunction indicator lamp output fault-signal B_err_In or the B_err_Exp of single-chip microcomputer, control trouble light and carry out the fault display alarm.
Below take environment temperature T_exp=10 degree centigrade that cabinet external environment temperature sensor detects be example, provide the embodiment that carries out housing temperature control by scheme of the present invention.At first contrast the fan work temperature look-up table shown in accompanying drawing 2, obtain closing fan running T1=24 ℃ of cabinet internal standard temperature value, open the fan low-speed running T2=28 ℃ of cabinet internal standard temperature value, close T3=29 ℃ of cabinet internal standard temperature value that fan runs up, open the cabinet internal standard temperature value T4=31 ℃ that fan runs up.Then when the temperature in chassis value T_in of housing temperature sensor sensing spends over 28, single-chip microcomputer output control signal B_low=1, B_high=0 controls fan and slowly runs, if temperature continues to rise to 31 while spending, single-chip microcomputer output control signal B_low=0, B_high=1 controls the fan high-speed rotation, decline along with housing temperature, between the 29-31 degree, fan continues to keep high-speed rotation (B_low=0, B_high=1), until housing temperature drops to 29 degree when following, single-chip microcomputer output control signal B_low=1, B_high=0 controls fan by becoming and slowly run at a high speed, then when sensing housing temperature between the 24-29 degree time, single-chip microcomputer keeps B_low=1, B_high=0, make fan slowly running before still maintaining, after temperature in chassis is lower than 24 degree, single-chip microcomputer output control signal B_low=0, B_high=0, make stopping fan rotation.
Control and can reach re-set target for probe temperature, as shown in Figure 4, further carried out practical test, control system is carried out to the cabinet inside temperature that in emulation accompanying drawing 4, Tin is the sensor sensing, the environment temperature that Texp is sensing, low is fan low speed control bit, and high is fan High-speed Control position.Generally external temperature Texp is more stable, and in this test, environment temperature is 10 ℃ of left and right, comprising random noise signal.When the cabinet inside temperature raises over low speed unlatching limit value T2, two fans (B_low=1 that slowly runs, B_high=0), when temperature continues to raise over high-speed rotation unlatching limit value T4, two fan high-speed rotation (B_low=0, B_high=1), in cabinet inside temperature decline process, when the cabinet inside temperature is closed limit value T3 lower than high speed fan, two fans slowly run (B_low=1, B_high=0), when the cabinet inside temperature is closed limit value T1 lower than the low speed fan, two fans cut out (B_low=0, B_high=0).The temperature controlled processes that test result fits like a glove and expects.
Only below that the preferred embodiment of the present invention is described; technical scheme of the present invention is not limited to this; the any known distortion that those skilled in the art do on the basis of major technique of the present invention design all belongs to the claimed technology category of the present invention, and the concrete protection domain of the present invention is as the criterion with the record of claims.
Claims (11)
1. a housing temperature intelligent control system, it is characterized in that, comprise single-chip microcomputer, temperature in chassis sensor, the outer temperature sensor of cabinet, fan and fan operation driving circuit, the temperature value of two temperature sensor senses is exported to single-chip microcomputer, described single-chip microcomputer comprises fan low-speed running control end and the fan control end that runs up, be connected to fan operation driving circuit, the SCM Based control signal of described fan operation driving circuit control fan in running up, low-speed running or the state that shuts down.
2. housing temperature intelligent control system according to claim 1, it is characterized in that, wherein said fan operation driving circuit comprises divider resistance, voltage source V CC and four transistors, the fan low-speed running control end of described single-chip microcomputer is connected in the base stage of first crystal triode, the collector of first crystal triode is connected in voltage source V CC, the emitter of first crystal triode is connected in the base stage of the 3rd transistor, the collector of the 3rd transistor is connected in fan one end through divider resistance, the grounded emitter of the 3rd transistor, the other end of fan is connected in described voltage source V CC, the fan of the described single-chip microcomputer control end that runs up is connected in the base stage of the second transistor, the collector of the second transistor is connected in described voltage source V CC, the emitter of the second transistor is connected in the base stage of the 4th transistor, the collector of the 4th transistor is connected in an end of described fan, the grounded emitter of the 4th transistor.
3. housing temperature intelligent control system according to claim 1 and 2, it is characterized in that, also comprise digital pipe driving chip and charactron, described digital pipe driving chip is connected in the temperature show state output terminal of single-chip microcomputer, described charactron is connected in digital pipe driving chip, for temperature in chassis and the cabinet external environment temperature of displays temperature sensor sensing.
4. housing temperature intelligent control system according to claim 2, it is characterized in that, the base terminal of above-mentioned four transistors all is connected with resistance, and four transistors are the NPN transistor, described first crystal triode and the second transistor are the miniwatt transistor, the quantity of described fan is two, and parallel with one another being arranged in cabinet.
5. according to the described housing temperature intelligent control system of claim 1-4 any one, it is characterized in that, prestore the fan work temperature look-up table of standard in described single-chip microcomputer, described fan work temperature look-up table provides under various cabinet external environment temperature values, corresponding to the temperature in chassis value condition of the various running statuses of fan, specifically comprise that fan cuts out operating temperature condition, fan low-speed running open temp condition, fan closing temperature condition and the fan open temp condition that runs up that runs up.
6. housing temperature intelligent control system according to claim 5, it is characterized in that, wherein when the temperature of described temperature sensor senses meets described fan low-speed running open temp condition, the fan low-speed running control end output high level signal of described single-chip microcomputer, the fan control end output low level signal that runs up, when the temperature of described temperature sensor senses meets described fan and runs up the open temp condition, the fan of the described single-chip microcomputer control end output high level signal that runs up, fan low-speed running control end output low level signal, when the temperature of described temperature sensor senses meets described fan and runs up the closing temperature condition, the fan low-speed running control end output high level signal of described single-chip microcomputer, the fan control end output low level signal that runs up, when the temperature of described temperature sensor senses meets described fan and closes the operating temperature condition, the fan low-speed running control end of described single-chip microcomputer and the fan equal output low level signal of control end that runs up.
7. according to the described housing temperature intelligent control system of claim 1-6 any one, it is characterized in that, described single-chip microcomputer comprises low-pass filter, fan control module and fault detection module, described low-pass filter carries out exporting to respectively fan control module and fault detection module after the filtering processing to the temperature data of temperature sensor input, described fan control module generates and exports the control signal of fan running status based on temperature data, described fault detection module is carried out fault verification based on temperature data, when it exports fault-signal to fan control module, fan control module generates and exports the fan control signal that runs up.
8. according to the described housing temperature intelligent control system of claim 1-7 any one, it is characterized in that, described temperature sensor model is DS18B20, described single-chip microcomputer model is STC89C516RD+, the miniwatt transistor that described first crystal triode and the second transistor are the S9013 model, described the 3rd transistor and the 4th transistor are the TIP122 transistor.
9. the intelligent control method of a housing temperature, it is characterized in that, described intelligent control method carries out based on the described housing temperature intelligent control system of claim 1-8 any one, prestore the fan work temperature look-up table of standard in the single-chip microcomputer that described housing temperature intelligent control system comprises, described fan work temperature look-up table provides under various cabinet external environment temperature values, temperature in chassis value condition corresponding to the desirable running status of fan, comprise that fan cuts out operating temperature value condition, fan low-speed running open temp value condition, fan closing temperature value condition and the fan open temp value condition that runs up that runs up, described intelligent control method comprises the following steps:
(1), the ambient temperature value T_exp of single-chip microcomputer reading machine box outside temperature sensor sensing, and extract the cabinet internal standard temperature value T1, the cabinet internal standard temperature value T2 that opens the fan low-speed running that close fan running according to this ambient temperature value T_exp in described fan work temperature look-up table, close the cabinet internal standard temperature value T3 that fan runs up and open the cabinet internal standard temperature value T4 that fan runs up;
(2), the temperature in chassis value T_in of single-chip microcomputer reading machine the temperature inside the box sensor sensing, and control fan in low speed, high speed or run-stopping status based on this temperature in chassis value T_in with corresponding to the relation between the described cabinet internal standard temperature value T1 of the desirable running status of fan, T2, T3, T4.
10. intelligent control method according to claim 9, is characterized in that, the pass between wherein said cabinet internal standard temperature value T1, T2, T3, T4 is T1<T2<T3<T4, and described step (2) is further comprising the steps:
A, when temperature in chassis value T_in is more than or equal to cabinet internal standard temperature value T2 and be less than cabinet internal standard temperature value T4, Single-chip Controlling fan low-speed running;
B, when temperature in chassis value T_in is less than or equal to cabinet internal standard temperature value T1, the Single-chip Controlling fan shuts down;
C, when temperature in chassis value T_in is greater than cabinet internal standard temperature value T1 and be less than cabinet internal standard temperature value T2, the running status of fan before single-chip microcomputer keeps;
D, when temperature in chassis value T_in is more than or equal to cabinet internal standard temperature value T4, the Single-chip Controlling fan runs up, until the temperature in chassis value T_in read is while being less than or equal to cabinet internal standard temperature value T3, the Single-chip Controlling fan switches to the low-speed running state by the state of running up.
11. according to the described intelligent control method of claim 9 or 10, it is characterized in that, also comprise failure detection steps, the cabinet external environment temperature value T_exp detected when described temperature sensor or temperature in chassis value T_in occur that when abnormal, the Single-chip Controlling fan runs up.
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