CN113093613A - Dangerous warning lamp temperature detection control system for transportation - Google Patents
Dangerous warning lamp temperature detection control system for transportation Download PDFInfo
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- CN113093613A CN113093613A CN202110360102.4A CN202110360102A CN113093613A CN 113093613 A CN113093613 A CN 113093613A CN 202110360102 A CN202110360102 A CN 202110360102A CN 113093613 A CN113093613 A CN 113093613A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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Abstract
The invention aims to solve the problem that the existing road icing condition cannot be monitored, and discloses a traffic transportation hazard warning lamp temperature detection control system which comprises a power supply unit, an MCU control system unit U1, a temperature start-stop setting unit, a temperature measuring unit, a temperature display unit, a relay control unit, a relay state display unit, a buzzer control unit and a hazard warning lamp display. The output through the singlechip is controlled, through exporting the relay drive triode to switch on and cut off through relay drive triode and control the break-make of relay circuit, control the on and break of the power of dangerous warning lamp through the relay, can carry out safety warning voluntarily when the low temperature and remind, the monitoring road surface condition of freezing, in order to arouse that the driver notices, realize the bright and go out of dangerous warning lamp.
Description
Technical Field
The invention relates to the field of transportation, in particular to a temperature detection control system of a dangerous warning lamp for transportation.
Background
The expressway is provided with road type indication guideboards, destination information guideboards, lane and speed limit information indication boards and other types, as well as service area marks, toll station information, toll station channels, milestones, vehicle distance reference boards, harbor type parking belts and lane indication boards. The guideboards can provide guidance for the running of the vehicle, such as sudden rain fall at night and rapid temperature removal, and dangerous warning lamps are arranged on partial roads to prompt that the passing vehicle decelerates to run and pay attention to the running safety so as to draw the attention of a driver.
However, most of the existing danger warning devices are arranged at a high-speed outlet, are high in cost, cannot automatically warn and remind people at low temperature, and cannot monitor the condition of road icing so as to attract the attention of drivers. Therefore, it is urgently needed to design a system for detecting and controlling the temperature of the hazard lamps for transportation to solve the defects of the prior art.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a temperature detection control system of a traffic transportation hazard warning lamp.
In order to solve the problem of the defects, the invention is realized by the following technical scheme:
the utility model provides a dangerous warning light temperature detection control system for transportation, including power supply unit, MCU control system unit, temperature start-stop set up unit, temperature measuring unit, temperature display element, relay control unit, relay state display element, bee calling organ control unit, dangerous warning light display.
The power supply unit provides a +5V power supply for the MCU control system unit, a temperature sensor of the temperature measurement unit can measure an atmospheric temperature value, the temperature sensor inputs a measured value into the MCU control system unit, and a temperature start-stop setting unit temperature start-stop resistor and the +5V power supply form a temperature start-stop setting signal; the relay control unit is used for directly controlling the on-off of the power supply of the danger warning lamp, the danger warning lamp is turned on when the relay is connected, and the danger warning lamp is turned off when the relay is disconnected; and finally, the temperature display unit displays the temperature value and the relay control unit drives the danger warning lamp display to display the danger characters.
The control system unit can monitor the temperature through the temperature measuring unit to realize zero-temperature low-temperature monitoring, is connected with a 5V power supply to supply power during working, generates an oscillation signal through a crystal oscillator Y1, and is grounded through a capacitance reset circuit and an input/output interface (pin);
the MCU control system unit comprises a singlechip U1, a resistor R1, a reset pull-down resistor R2, a resonant capacitor C1, a resonant capacitor C2, a crystal oscillator Y1, a capacitor C3 and an RSET switch; the crystal oscillator Y1 provides a basic oscillation signal for the singlechip;
the MCU control system unit can monitor temperature through the temperature measuring unit to realize zero-temperature low-temperature monitoring, is connected with a 5V power supply to supply power during working, generates an oscillation signal through a crystal oscillator Y1, and is grounded through a capacitance reset circuit and an input/output interface (pin);
the temperature start-stop setting unit comprises 4 temperature start-stop resistors and corresponding start-stop setting switches, wherein the 4 temperature start-stop resistors are a resistor R3, a resistor R4, a resistor R5 and a resistor R6 respectively; the start-stop setting switches are a StarUp switch, a StarDn switch, a StopUp switch and a StopDN switch; the temperature start-stop setting unit temperature start-stop resistor and the +5V power supply form a temperature start-stop setting signal;
the temperature measuring unit comprises a temperature sensor U2 and a temperature sensor pull-up resistor R7; the temperature sensor of the temperature measuring unit can measure an atmospheric temperature value;
the temperature display unit comprises a display driver U3 and a nixie tube display LED; the temperature display unit displays a temperature value;
the relay control unit comprises a relay K1, a reverse protection diode D1, relay driving triodes Q1 and P1 and a limiting resistor R8; the relay control unit is used for directly controlling the on-off of a power supply of the danger warning lamp, the danger warning lamp is turned on when the relay is connected, and the danger warning lamp is turned off when the relay is disconnected;
the relay state display unit comprises a red light emitting diode, a green light emitting diode, a limiting resistor R9 and a limiting resistor R10;
the buzzer control unit comprises a buzzer LS, a buzzer driving triode Q2 and a limiting resistor R11;
the relay state display unit and the buzzer control unit are used for judging whether the relay works normally or not by using the voltage signal;
in the above scheme, the pin VCC of the MCU control system unit 1 single chip microcomputer U1 and the pin 1 of the resistor R1 are connected to a +5V power supply, and the pins P00, P01, P02, P03, P04, P05, P06, and P07 of the single chip microcomputer U1 are connected to the pins 2, 3, 4, 5, 6, 7, 8, and 9 of the resistor R1, respectively; the end of a pin T0 of the singlechip U1 is connected with the end of a pin 2 of a temperature sensor U2 of the temperature measuring unit 3; the ends of pins RXD, TXD, INT1 and INT0 of the single chip microcomputer U1 are respectively connected with one ends of a StarUp switch, a StarDn switch, a StopUp switch and a StopDN switch of the temperature start-stop setting unit 3; one end of a temperature start-stop resistor R3, a temperature start-stop resistor R4, a temperature start-stop resistor R5 and a temperature start-stop resistor R6 are connected; pins P10, P11, P12, P13, P14 and P15 of the single chip microcomputer U1 are connected with the ends of pins 1D, 2D, 3D, 4D, 5D and 6D of the temperature sensor U3 respectively; the WR end of a pin of the singlechip U1 is connected with one end of a limiting resistor R8 of the relay control unit; the WR end P20 and P21 of the pin of the singlechip U1 are respectively connected with one end of a limiting resistor R9 and one end of a limiting resistor R10 of the relay state display unit; the end of a pin T1 of the singlechip U1 is connected with one end of a limiting resistor R11 of the buzzer control unit; the end of a pin X1 of the singlechip U1 is connected with one end of a resonant capacitor C1 and one end of a crystal oscillator Y1, the end of a pin X2 of the singlechip U1 is connected with one end of a resonant capacitor C2 and the other end of the crystal oscillator Y1, and the other end of the resonant capacitor C1 is grounded with the other end of a resonant capacitor C2; the RSET switch end of a pin of the singlechip U1 is connected with one end of a capacitor C3 and one end of a reset pull-down resistor R2, the other ends of the capacitor C3 and the RSET switch are connected with a +5V power supply, and the other end of the reset pull-down resistor R2 is grounded; the GND end of the pin of the singlechip U1 is grounded;
one end of a temperature sensor pull-up resistor R7 of the temperature measuring unit 3 is connected with the 2 end of a pin of a temperature sensor U2, and the other end of the temperature sensor pull-up resistor R7 is connected with the 3 end of a pin of a temperature sensor U2 and is connected with a +5V power supply; the pin 1 end of the temperature sensor U2 is grounded;
one end of a temperature start-stop resistor R3, a temperature start-stop resistor R4, a temperature start-stop resistor R5 and one end of a temperature start-stop resistor R6 are connected with one end of a StarUp switch, a StarDn switch, a StopUp switch and a StopDn switch of the temperature start-stop setting unit 3, and the other ends of the temperature start-stop resistor R3, the temperature start-stop resistor R4, the temperature start-stop resistor R5 and the temperature start-stop resistor R6 are connected with a +5V power supply; the other ends of the StarUp switch, the StarDn switch, the StopUp switch and the StopDN switch of the temperature start-stop setting unit 3 are grounded;
the temperature display unit comprises a pin C and a pin VCC of a display driver U3 which are connected with a +5V power supply; pins 1Q, 2Q, 3Q, 4Q, 5Q and 6Q of the display driver U3 are respectively connected with pins DIG1, DIG2, DIG3, DIG4, DIG5 and DIG6 at one end of the LED of the nixie tube display; a pin at the other end of the LED of the nixie tube display is connected with the ends of pins 2, 3, 4, 5, 6, 7, 8 and 9 of the resistor R1; pins OC and GND of display driver U3 are grounded;
the other ends of a limiting resistor R9 and a limiting resistor R10 of the relay state display unit are respectively connected with one end of a red light emitting diode and one end of a green light emitting diode; the other ends of the red light emitting diode and the green light emitting diode are connected with a +5V power supply;
the other end of a limiting resistor R11 of the buzzer control unit is connected with a base electrode of a buzzer driving triode Q2, and an emitting electrode of the buzzer driving triode Q2 is connected with one end of a buzzer LS; the other end of the buzzer LS is connected with a +5V power supply; the emitter of the triode Q2 is driven to be grounded by the buzzer;
preferably, the model of the single chip microcomputer of the MCU control system unit is STC89C 52; the reset pull-down resistor R2 is 10K omega; the size of the resonant capacitor C1 is equal to that of the resonant capacitor C2, and is 22pF, the size of the crystal oscillator Y1 and the size of the capacitor C3 are 10 pF; the crystal oscillator Y1 adopts a frequency of 12 MHz;
preferably, the temperature start-stop setting unit comprises 4 temperature start-stop resistors which are equal in size and are all 10K omega;
preferably, the temperature measuring unit has a temperature sensor model number of 18B20U2, a temperature sensor pull-up resistor R7 with a size of 4.7K omega,
preferably, the temperature display unit displays a driver model number of 74HC 573;
preferably, the relay control unit reverse protection diode D1 is 1N 4001; the relay driving triode Q1 is 2N 5551; the limiting resistor R8 is 470 omega;
preferably, the relay state display unit limit resistor R9 and the limit resistor R10 have the same size and are 10K Ω;
preferably, the buzzer control unit drives the triode Q2 to make the size of the limit resistor R11 470 omega.
Compared with the prior art, the invention has the beneficial effects that:
the single chip microcomputer and the temperature sensor adopted by the invention have low price and wide application; the temperature measurement value is displayed by adopting a six-digit nixie tube, the temperature measurement value can display positive temperature and negative temperature, the positive temperature is displayed by lightening the first and second digit points of the nixie tube, and the negative temperature is displayed by lightening the middle display point; and finally, the control is realized through the output of the singlechip, the triode is driven through the relay, the on-off of a relay circuit is controlled through the on-off of the triode driven by the relay, the on-off of a power supply of the dangerous warning lamp is controlled through the relay, the automatic safety warning reminding can be realized at low temperature, the road icing condition cannot be monitored, the attention of a driver is attracted, and the on-off of the dangerous warning lamp is realized.
Drawings
Fig. 1 is a control schematic block diagram of the present invention.
FIG. 2 is a schematic diagram of the MCU control system of the present invention.
Fig. 3 is a schematic diagram of the temperature start-stop setting of the present invention.
Fig. 4 is a schematic diagram of the temperature measurement of the present invention.
Fig. 5 is a schematic diagram of the temperature display of the present invention.
Fig. 6 is a control schematic diagram of the relay of the present invention.
Fig. 7 is a state diagram of the relay of the present invention.
Fig. 8 is a schematic diagram of a buzzer of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures shown in the drawings and descriptions thereof may be omitted
In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a defined feature of "first", "second", may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, so to speak, as communicating between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
Referring to fig. 1-8, the present invention provides a technical solution:
the utility model provides a dangerous warning light temperature detection control system for transportation, includes power supply unit, MCU control system unit U1, temperature start-stop setting unit, temperature measuring unit, temperature display element, relay control unit, relay state display element, bee calling organ control unit, dangerous warning light display.
The MCU control system unit comprises a singlechip U1, a resistor R1, a reset pull-down resistor R2, a resonant capacitor C1, a resonant capacitor C2, a crystal oscillator Y1, a capacitor C3 and an RSET switch; the crystal oscillator Y1 provides a basic oscillation signal for the singlechip;
the MCU control system unit can monitor temperature through the temperature measuring unit to realize zero-temperature low-temperature monitoring, is connected with a 5V power supply to supply power during working, generates an oscillation signal through a crystal oscillator Y1, and is grounded through a capacitance reset circuit and an input/output interface (pin);
the temperature start-stop setting unit comprises 4 temperature start-stop resistors and corresponding start-stop setting switches, wherein the 4 temperature start-stop resistors are a resistor R3, a resistor R4, a resistor R5 and a resistor R6 respectively; the start-stop setting switches are a StarUp switch, a StarDn switch, a StopUp switch and a StopDN switch; the temperature start-stop setting unit temperature start-stop resistor and the +5V power supply form a temperature start-stop setting signal;
the temperature measuring unit comprises a temperature sensor U2 and a temperature sensor pull-up resistor R7; the temperature sensor of the temperature measuring unit can measure an atmospheric temperature value;
the temperature display unit comprises a display driver U3 and a nixie tube display LED; the temperature display unit displays a temperature value;
the relay control unit comprises a relay K1, a reverse protection diode D1, relay driving triodes Q1 and P1 and a limiting resistor R8; the relay control unit is used for directly controlling the on-off of a power supply of the danger warning lamp, the danger warning lamp is turned on when the relay is connected, and the danger warning lamp is turned off when the relay is disconnected;
the relay state display unit comprises a red light emitting diode, a green light emitting diode, a limiting resistor R9 and a limiting resistor R10;
the buzzer control unit comprises a buzzer LS, a buzzer driving triode Q2 and a limiting resistor R11;
the relay state display unit and the buzzer control unit are used for judging whether the relay works normally or not by using the voltage signal;
in the above scheme, the pin VCC of the MCU control system unit 1 single chip microcomputer U1 and the pin 1 of the resistor R1 are connected to a +5V power supply, and the pins P00, P01, P02, P03, P04, P05, P06, and P07 of the single chip microcomputer U1 are connected to the pins 2, 3, 4, 5, 6, 7, 8, and 9 of the resistor R1, respectively; the end of a pin T0 of the singlechip U1 is connected with the end of a pin 2 of a temperature sensor U2 of the temperature measuring unit 3; the ends of pins RXD, TXD, INT1 and INT0 of the single chip microcomputer U1 are respectively connected with one ends of a StarUp switch, a StarDn switch, a StopUp switch and a StopDN switch of the temperature start-stop setting unit 3; one end of a temperature start-stop resistor R3, a temperature start-stop resistor R4, a temperature start-stop resistor R5 and a temperature start-stop resistor R6 are connected; pins P10, P11, P12, P13, P14 and P15 of the single chip microcomputer U1 are connected with the ends of pins 1D, 2D, 3D, 4D, 5D and 6D of the temperature sensor U3 respectively; the WR end of a pin of the singlechip U1 is connected with one end of a limiting resistor R8 of the relay control unit; the WR end P20 and P21 of the pin of the singlechip U1 are respectively connected with one end of a limiting resistor R9 and one end of a limiting resistor R10 of the relay state display unit; the end of a pin T1 of the singlechip U1 is connected with one end of a limiting resistor R11 of the buzzer control unit; the end of a pin X1 of the singlechip U1 is connected with one end of a resonant capacitor C1 and one end of a crystal oscillator Y1, the end of a pin X2 of the singlechip U1 is connected with one end of a resonant capacitor C2 and the other end of the crystal oscillator Y1, and the other end of the resonant capacitor C1 is grounded with the other end of a resonant capacitor C2; the RSET switch end of a pin of the singlechip U1 is connected with one end of a capacitor C3 and one end of a reset pull-down resistor R2, the other ends of the capacitor C3 and the RSET switch are connected with a +5V power supply, and the other end of the reset pull-down resistor R2 is grounded; the GND end of the pin of the singlechip U1 is grounded;
one end of a temperature sensor pull-up resistor R7 of the temperature measuring unit 3 is connected with the 2 end of a pin of a temperature sensor U2, and the other end of the temperature sensor pull-up resistor R7 is connected with the 3 end of a pin of a temperature sensor U2 and is connected with a +5V power supply; the pin 1 end of the temperature sensor U2 is grounded;
one end of a temperature start-stop resistor R3, a temperature start-stop resistor R4, a temperature start-stop resistor R5 and one end of a temperature start-stop resistor R6 are connected with one end of a StarUp switch, a StarDn switch, a StopUp switch and a StopDn switch of the temperature start-stop setting unit 3, and the other ends of the temperature start-stop resistor R3, the temperature start-stop resistor R4, the temperature start-stop resistor R5 and the temperature start-stop resistor R6 are connected with a +5V power supply; the other ends of the StarUp switch, the StarDn switch, the StopUp switch and the StopDN switch of the temperature start-stop setting unit 3 are grounded;
the temperature display unit comprises a pin C and a pin VCC of a display driver U3 which are connected with a +5V power supply; pins 1Q, 2Q, 3Q, 4Q, 5Q and 6Q of the display driver U3 are respectively connected with pins DIG1, DIG2, DIG3, DIG4, DIG5 and DIG6 at one end of the LED of the nixie tube display; a pin at the other end of the LED of the nixie tube display is connected with the ends of pins 2, 3, 4, 5, 6, 7, 8 and 9 of the resistor R1; pins OC and GND of display driver U3 are grounded;
the other ends of a limiting resistor R9 and a limiting resistor R10 of the relay state display unit are respectively connected with one end of a red light emitting diode and one end of a green light emitting diode; the other ends of the red light emitting diode and the green light emitting diode are connected with a +5V power supply;
the other end of a limiting resistor R11 of the buzzer control unit is connected with a base electrode of a buzzer driving triode Q2, and an emitting electrode of the buzzer driving triode Q2 is connected with one end of a buzzer LS; the other end of the buzzer LS is connected with a +5V power supply; the emitter of the triode Q2 is driven to be grounded by the buzzer;
preferably, the model of the single chip microcomputer of the MCU control system unit is STC89C 52; the reset pull-down resistor R2 is 10K omega; the size of the resonant capacitor C1 is equal to that of the resonant capacitor C2, and is 22pF, the size of the crystal oscillator Y1 and the size of the capacitor C3 are 10 pF; the crystal oscillator Y1 adopts a frequency of 12 MHz;
preferably, the temperature start-stop setting unit comprises 4 temperature start-stop resistors which are equal in size and are all 10K omega;
preferably, the temperature measuring unit has a temperature sensor model number of 18B20U2, a temperature sensor pull-up resistor R7 with a size of 4.7K omega,
preferably, the temperature display unit displays a driver model number of 74HC 573;
preferably, the relay control unit reverse protection diode D1 is 1N 4001; the relay driving triode Q1 is 2N 5551; the limiting resistor R8 is 470 omega;
preferably, the relay state display unit limit resistor R9 and the limit resistor R10 have the same size and are 10K Ω;
preferably, the buzzer control unit drives the triode Q2 to make the size of the limit resistor R11 470 omega.
The invention adopts a six-digit nixie tube to display the temperature measurement value, which can display positive temperature and negative temperature, the first two digits of the nixie tube display the positive temperature, and the middle display digit is displayed as the negative temperature; and finally, the control is realized through the output of the singlechip, the triode is driven through the relay, the on-off of a relay circuit is controlled through the on-off of the triode driven by the relay, the on-off of a power supply of the dangerous warning lamp is controlled through the relay, the automatic safety warning reminding can be realized at low temperature, the road icing condition cannot be monitored, the attention of a driver is attracted, and the on-off of the dangerous warning lamp is realized.
The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent. It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. A temperature detection control system of a dangerous warning lamp for transportation comprises a power supply unit, an MCU control system unit, a temperature start-stop setting unit, a temperature measuring unit, a temperature display unit, a relay control unit, a relay state display unit, a buzzer control unit and a dangerous warning lamp display;
the MCU control system unit comprises a singlechip U1, a resistor R1, a reset pull-down resistor R2, a resonant capacitor C1, a resonant capacitor C2, a crystal oscillator Y1, a capacitor C3 and an RSET switch; the crystal oscillator Y1 provides a basic oscillation signal for the singlechip;
the MCU control system unit can monitor temperature through the temperature measuring unit to realize zero-temperature low-temperature monitoring, is connected with a 5V power supply to supply power during working, generates an oscillation signal through a crystal oscillator Y1, and is grounded through a capacitance reset circuit and an input/output interface (pin);
the temperature start-stop setting unit comprises 4 temperature start-stop resistors and corresponding start-stop setting switches, wherein the 4 temperature start-stop resistors are a resistor R3, a resistor R4, a resistor R5 and a resistor R6 respectively; the start-stop setting switches are a StarUp switch, a StarDn switch, a StopUp switch and a StopDN switch; the temperature start-stop setting unit temperature start-stop resistor and the +5V power supply form a temperature start-stop setting signal;
the temperature measuring unit comprises a temperature sensor U2 and a temperature sensor pull-up resistor R7; the temperature sensor of the temperature measuring unit can measure an atmospheric temperature value;
the temperature display unit comprises a display driver U3 and a nixie tube display LED; the temperature display unit displays a temperature value;
the relay control unit comprises a relay K1, a reverse protection diode D1, relay driving triodes Q1 and P1 and a limiting resistor R8; the relay control unit is used for directly controlling the on-off of a power supply of the danger warning lamp, the danger warning lamp is turned on when the relay is connected, and the danger warning lamp is turned off when the relay is disconnected;
the relay state display unit comprises a red light emitting diode, a green light emitting diode, a limiting resistor R9 and a limiting resistor R10;
the buzzer control unit comprises a buzzer LS, a buzzer driving triode Q2 and a limiting resistor R11.
2. The system as claimed in claim 1, wherein the crystal oscillator Y1 has a frequency of 12 MHz.
3. The system of claim 1, wherein the temperature start/stop setting unit comprises 4 temperature start/stop resistors with equal size, and the temperature start/stop resistors are all 10K Ω.
4. The system as claimed in claim 1, wherein the temperature measuring unit is a 18B20U2 type temperature sensor, and the pull-up resistor R7 of the temperature measuring unit is 4.7K Ω.
5. The system as claimed in claim 1, wherein the temperature display unit displays driver model number 74HC 573.
6. The system for detecting and controlling the temperature of the hazard lamps for transportation according to claim 1, wherein the reverse protection diode D1 of the relay control unit is 1N 4001; the relay driving triode Q1 is 2N 5551; the limiting resistor R8 is 470 omega.
7. The system for detecting and controlling the temperature of a traffic light as claimed in claim 1, wherein the limiting resistor R9 and the limiting resistor R10 of the relay status display unit are equal in size and 10K Ω.
8. The system as claimed in claim 1, wherein the buzzer control unit comprises a buzzer driving transistor Q2 of type 470 Ω, and a limiting resistor R11 of type 470 Ω.
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| CN105068576A (en) * | 2015-05-22 | 2015-11-18 | 苏州工业职业技术学院 | Microcontroller-based intelligent electric water heater system design and implementation method thereof |
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