CN107340790A - A kind of photoelectricity engine and its temperature control method with temperature control system - Google Patents
A kind of photoelectricity engine and its temperature control method with temperature control system Download PDFInfo
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- CN107340790A CN107340790A CN201710804430.2A CN201710804430A CN107340790A CN 107340790 A CN107340790 A CN 107340790A CN 201710804430 A CN201710804430 A CN 201710804430A CN 107340790 A CN107340790 A CN 107340790A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000005622 photoelectricity Effects 0.000 title abstract 8
- 239000000758 substrate Substances 0.000 claims abstract description 50
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 description 18
- 230000017525 heat dissipation Effects 0.000 description 9
- 239000013078 crystal Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a kind of photoelectricity engine with temperature control system, including photoelectricity engine substrate, provided with multiple signal ends；Control system, the corresponding a certain signal end being connected on the photoelectricity engine substrate；Temperature sensor, corresponding to be connected to control system, the temperature sensor is used for the real time temperature signal for detecting the photoelectricity engine substrate；The control system is used to receiving and handling the real time temperature signal, and generate result, and for sending control signal to the pulse-width signal input of the photoelectricity engine substrate according to the result, control the high level dutycycle at the pulse-width signal end of the photoelectricity engine substrate.The invention also discloses a kind of temperature control method of the photoelectricity engine with temperature control system.
Description
Technical Field
The invention relates to the field of mechanical photoelectric engines and the like, in particular to a photoelectric engine with a temperature control system and a temperature control method thereof.
Background
At present, for a high-power photoelectric engine, because the power of the driven LED is high, the heat dissipation power of the LED is relatively high, and the temperature rise of a substrate of the photoelectric engine is high. During peak power, the substrate for mounting the LED lamp beads can reach more than 100 ℃, and long-time high temperature has negative effects on the LED lamp beads and the substrate. Therefore, the temperature of the substrate needs to be lowered to ensure that the photovoltaic engine can work effectively for a long time. Currently, the problem of high substrate heating can be solved in several ways:
cooling by a heat dissipation mode: the method is passive cooling. The photovoltaic engine substrate uses an aluminum substrate with a good heat dissipation coefficient, and thus most of the heat is reduced by heat dissipation. If heat dissipation is required to reduce the temperature, other materials with better heat dissipation coefficients are used, or the area of the heat dissipation material is increased, so that the size and the cost are increased, and the requirement for improvement of the shell is met. Therefore, this method has limitations and can be used for future use.
Cooling by reducing the driving power: the method actively reduces the temperature. And on the premise of ensuring that the minimum design required power is reached, the power reduction and temperature reduction are realized. However, the active cooling method is too general, and at present, no feasible solution for solving the active cooling or heating problem has been provided on the substrate of the photovoltaic engine.
Disclosure of Invention
The purpose of the invention is: the temperature of the photoelectric engine substrate can be actually regulated and controlled according to the real-time temperature value of the photoelectric engine substrate, so that the temperature of the photoelectric engine substrate is kept in a certain range, and the photoelectric engine substrate is kept in a good working state.
The technical scheme for realizing the purpose is as follows: a photoelectric engine with a temperature control system comprises a photoelectric engine substrate, a temperature control unit and a temperature control unit, wherein the photoelectric engine substrate is provided with a plurality of signal terminals; the control system is correspondingly connected with a certain signal end on the photoelectric engine substrate; the temperature sensor is correspondingly connected to the control system and used for detecting a real-time temperature signal of the photoelectric engine substrate; the control system is used for receiving and processing the real-time temperature signal, generating a processing result, sending a control signal to the pulse width modulation signal input end of the photoelectric engine substrate according to the processing result, and controlling the high-level duty ratio of the pulse width modulation signal end of the photoelectric engine substrate.
In a preferred embodiment of the present invention, the control system is a single chip.
In a preferred embodiment of the present invention, the single chip comprises a chip, which is provided with a plurality of signal connection terminals; and the power supply filter circuit is correspondingly connected with a certain signal connecting end on the chip.
In a preferred embodiment of the present invention, the temperature sensor includes a negative temperature coefficient thermistor circuit.
In a preferred embodiment of the present invention, the ntc thermistor circuit includes a thermistor resistance value measuring circuit, the thermistor resistance value measuring circuit is provided with a thermistor and a first resistor connected in series with the thermistor, a resistance value detecting end is arranged between the thermistor and the first resistor, the resistance value detecting end is also a voltage dividing end, the voltage dividing end is connected to the analog-to-digital conversion signal interface of the chip, the thermistor resistance value measuring circuit transmits the detected divided voltage value of the analog quantity at the voltage dividing end to the chip, the chip converts the divided voltage value of the analog quantity into a divided voltage value of a digital quantity, and calculates the corresponding temperature value according to the divided voltage value of the digital quantity.
In a preferred embodiment of the present invention, the thermistor resistance measuring circuit is provided with a power input terminal, a power ground input terminal, a pulse width modulation signal output terminal, a program downloading terminal, and a thermistor access terminal.
Another object of the invention is: a temperature control method of a photovoltaic engine with a temperature control system is provided.
The technical scheme for realizing the purpose is as follows: a temperature control method of a photoelectric engine with a temperature control system comprises the following steps: step S1) acquiring a real-time temperature value on the photoelectric engine substrate; step S2), comparing the real-time temperature value with a preset temperature value, and judging whether the difference value between the real-time temperature value and the preset temperature value exceeds a preset range, if so, entering the step S3), otherwise, returning to the step S1); step S3) sends a control signal to the pulse width modulation signal input terminal of the photo engine substrate, and controls the high level duty ratio of the pulse width modulation signal terminal of the photo engine substrate.
In a preferred embodiment of the present invention, the step S1) includes the steps S11) of obtaining a divided voltage value of the analog quantity detected by the thermistor resistance value measuring circuit; step S12) converting the divided voltage value of the analog quantity into a divided voltage value of a digital quantity; step S13) according to the pre-stored corresponding relation table of voltage value and temperature, calculating the real-time temperature value corresponding to the voltage value.
In a preferred embodiment of the present invention, the absolute value of the preset range of the difference between the real-time temperature value and the preset temperature value in the step S2) is 5%.
In a preferred embodiment of the present invention, the step S3) includes the following steps: step S31), judging whether the real-time temperature value is higher than the preset temperature value, if so, entering step S32), and if not, entering step S33); step S32) reducing the high-level duty ratio of the pulse width modulation signal end and reducing the output power of the photoelectric engine; step S33) increasing the high-level duty ratio of the pulse width modulation signal end and improving the output power of the photoelectric engine.
The invention has the advantages that: the photoelectric engine of the temperature control system and the temperature control method thereof effectively detect the real-time temperature on the photoelectric engine substrate in real time through the temperature sensor, convert the voltage value of the partial pressure into the real-time temperature value, and control the high-level duty ratio of the pulse width modulation signal end according to the real-time temperature value to control the output power of the photoelectric engine so as to control the temperature of the photoelectric engine substrate.
Drawings
The invention is further explained below with reference to the figures and examples.
Fig. 1 is a schematic structural diagram of a photovoltaic engine with a temperature control system according to an embodiment of the present invention.
Fig. 2 is a flowchart illustrating steps of a method for controlling a temperature of a photovoltaic engine according to an embodiment of the present invention.
Fig. 3 is a flowchart of the detailed steps of step S1) in fig. 2.
Fig. 4 is a flowchart of the detailed steps of step S3) in fig. 2.
Wherein,
1 an electric engine substrate; 2, controlling the system; 3 a temperature sensor.
Detailed Description
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., refer to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention.
Examples
As shown in fig. 1, a photovoltaic engine with a temperature control system includes a photovoltaic engine substrate, a control system, and a temperature sensor.
In this embodiment, the temperature sensor and the control system may be integrated on the board surface of the photovoltaic engine substrate.
In this embodiment, in order to increase the heat dissipation effect, the substrate of the photovoltaic engine is an aluminum substrate with a good heat dissipation coefficient.
In this embodiment, the photo engine substrate is provided with a plurality of signal terminals; the control system is correspondingly connected with a certain signal end on the photoelectric engine substrate.
Specifically, the control system is a single chip microcomputer. The single chip microcomputer comprises a chip and a peripheral circuit, and the temperature sensor can be integrated on the peripheral circuit. The chip, the first resistor, the first capacitor, the second capacitor, the fourth capacitor, the fifth capacitor and the crystal oscillator form a singlechip minimum system (the singlechip minimum system is called as a minimum system in popular meaning). The external crystal oscillator circuit is composed of a crystal oscillator, a fourth capacitor and a fifth capacitor, wherein the fourth capacitor and the fifth capacitor are connected in series, and the crystal oscillator is connected between the output ends of the third capacitor and the sixth capacitor.
In addition, the peripheral circuit comprises a power supply filter circuit and an input anti-reverse connection circuit. The power supply filter circuit is a 5V power supply filter circuit consisting of a third capacitor and a sixth capacitor, wherein the third capacitor and the sixth capacitor are connected in parallel, and the connection end of the third capacitor and the sixth capacitor is correspondingly connected to the signal connection end of the chip. The input anti-reverse-connection circuit is composed of diodes. This will not be described in detail.
In this embodiment, the temperature sensor is correspondingly connected to the control system, and the temperature sensor is configured to detect a real-time temperature signal of the photovoltaic engine substrate.
Specifically, the temperature sensor includes a negative temperature coefficient thermistor circuit. The negative temperature coefficient thermistor circuit comprises a thermistor resistance value measuring circuit, wherein the thermistor resistance value measuring circuit is provided with a thermistor (NTC) and a first resistor connected with the thermistor (NTC) in series, a resistance value detecting end (test1) is arranged between the thermistor (NTC) and the first resistor, the resistance value detecting end is also a voltage dividing end, the voltage dividing end is connected to an analog-to-digital conversion signal interface of the chip, and the thermistor resistance value measuring circuit transmits the voltage dividing voltage value of the analog quantity detected by the voltage dividing end to the chip.
In this embodiment, the resistance value of the first resistor is 10K Ω and the resistance value of the thermistor (NTC) is 10K at a temperature of 25 ℃. The thermistor resistance value measuring circuit is provided with a power supply input end (+5V), a power supply ground input end (GND), a pulse width modulation signal output end (PWM), a program downloading end (ISP) and a thermistor access end (NTC), and is connected with the control circuit through the ports.
Because the space of the photoelectric engine substrate is limited, an external crystal oscillator is not needed, and the singlechip is provided with an internal crystal oscillator and can be used in the design. Therefore, the reducible elements are a diode, a crystal oscillator, a fourth capacitor and a fifth capacitor.
The control system is used for receiving and processing the real-time temperature signal, generating a processing result, sending a control signal to the pulse width modulation signal input end of the photoelectric engine substrate according to the processing result, and controlling the high-level duty ratio of the pulse width modulation signal end of the photoelectric engine substrate.
In the actual use process, the chip converts the voltage division value of the analog quantity into a voltage division value of a digital quantity, and calculates the corresponding temperature value according to the voltage division value of the digital quantity.
The temperature control method for realizing the photoelectric engine with the temperature control system comprises the following steps.
Step S1) obtains a real-time temperature value on the photo-engine substrate. This step S1) specifically includes the following steps. The step S1) includes the step S11) of obtaining a divided voltage value of the analog quantity detected by the thermistor resistance value measuring circuit; step S12) converting the divided voltage value of the analog quantity into a divided voltage value of a digital quantity; step S13) according to the pre-stored corresponding relation table of voltage value and temperature, calculating the real-time temperature value corresponding to the voltage value.
Step S2) comparing the real-time temperature value with the preset temperature value, and determining whether the difference between the real-time temperature value and the preset temperature value exceeds the preset range, if so, entering step S3), otherwise, returning to step S1). The absolute value of the preset range of the difference value between the real-time temperature value and the preset temperature value in the step S2) is 5%.
Step S3) sends a control signal to the pulse width modulation signal input terminal of the photo engine substrate, and controls the high level duty ratio of the pulse width modulation signal terminal of the photo engine substrate. The step S3) includes the steps of: step S31), judging whether the real-time temperature value is higher than the preset temperature value, if so, entering step S32), and if not, entering step S33); step S32) reducing the high-level duty ratio of the pulse width modulation signal end and reducing the output power of the photoelectric engine; step S33) increasing the high-level duty ratio of the pulse width modulation signal end and improving the output power of the photoelectric engine.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A photovoltaic engine with a temperature control system, comprising
The photoelectric engine substrate is provided with a plurality of signal terminals;
the control system is correspondingly connected with a certain signal end on the photoelectric engine substrate;
the temperature sensor is correspondingly connected to the control system and used for detecting a real-time temperature signal of the photoelectric engine substrate; the control system is used for receiving and processing the real-time temperature signal, generating a processing result, sending a control signal to the pulse width modulation signal input end of the photoelectric engine substrate according to the processing result, and controlling the high-level duty ratio of the pulse width modulation signal end of the photoelectric engine substrate.
2. The photo engine with temperature control system as claimed in claim 1, wherein the control system is a single chip microcomputer.
3. The photovoltaic engine with temperature control system of claim 2, wherein the single-chip microcomputer comprises
The chip is provided with a plurality of signal connecting ends;
and the power supply filter circuit is correspondingly connected with a certain signal connecting end on the chip.
4. The photovoltaic engine with temperature control system of claim 3, wherein the temperature sensor comprises a negative temperature coefficient thermistor circuit.
5. The photovoltaic engine with a temperature control system according to claim 4, wherein the NTC thermistor circuit comprises a thermistor resistance value measuring circuit, the thermistor resistance value measuring circuit is provided with a thermistor and a first resistor connected in series with the thermistor, a resistance value detecting end is arranged between the thermistor and the first resistor, the resistance value detecting end is also a voltage dividing end, the voltage dividing end is connected to the analog-to-digital conversion signal interface of the chip, the thermistor resistance value measuring circuit transmits the detected divided voltage value of the analog quantity at the voltage dividing end to the chip, the chip converts the divided voltage value of the analog quantity into a divided voltage value of a digital quantity, and calculates the corresponding temperature value according to the divided voltage value of the digital quantity.
6. The photovoltaic engine with a temperature control system according to claim 5, wherein the thermistor resistance value measuring circuit is provided with a power input terminal, a power ground input terminal, a pulse width modulation signal output terminal, a program downloading terminal, and a thermistor accessing terminal.
7. A method of controlling the temperature of a photovoltaic engine having a temperature control system according to any one of claims 1 to 6, comprising the steps of:
step S1) acquiring a real-time temperature value on the photoelectric engine substrate;
step S2), comparing the real-time temperature value with a preset temperature value, and judging whether the difference value between the real-time temperature value and the preset temperature value exceeds a preset range, if so, entering the step S3), otherwise, returning to the step S1);
step S3) sends a control signal to the pulse width modulation signal input terminal of the photo engine substrate, and controls the high level duty ratio of the pulse width modulation signal terminal of the photo engine substrate.
8. The method for controlling temperature of a photovoltaic engine with a temperature control system according to claim 7, wherein the step S1) comprises
Step S11) obtaining the voltage division value of the analog quantity detected by the thermistor resistance value measuring circuit;
step S12) converting the divided voltage value of the analog quantity into a divided voltage value of a digital quantity;
step S13) according to the pre-stored corresponding relation table of voltage value and temperature, calculating the real-time temperature value corresponding to the voltage value.
9. The method of claim 7, wherein the absolute value of the preset range of the difference between the real-time temperature value and the preset temperature value in the step S2) is 5%.
10. The temperature control method of a photovoltaic engine with a temperature control system according to claim 7, wherein the step S3) comprises the steps of:
step S31), judging whether the real-time temperature value is higher than the preset temperature value, if so, entering step S32), and if not, entering step S33);
step S32) reducing the high-level duty ratio of the pulse width modulation signal end and reducing the output power of the photoelectric engine;
step S33) increasing the high-level duty ratio of the pulse width modulation signal end and improving the output power of the photoelectric engine.
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| CN201710804430.2A CN107340790A (en) | 2017-09-08 | 2017-09-08 | A kind of photoelectricity engine and its temperature control method with temperature control system |
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| CN201710804430.2A CN107340790A (en) | 2017-09-08 | 2017-09-08 | A kind of photoelectricity engine and its temperature control method with temperature control system |
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-
2017
- 2017-09-08 CN CN201710804430.2A patent/CN107340790A/en active Pending
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| CN101118190A (en) * | 2007-06-15 | 2008-02-06 | 杨如祥 | Temperature measurement device and process for measuring temperature with device |
| US20130077363A1 (en) * | 2011-09-22 | 2013-03-28 | Hon Hai Precision Industry Co., Ltd. | Power supply circuit with temperature compensation and electronic device |
| US20150035438A1 (en) * | 2013-08-05 | 2015-02-05 | Cal-Comp Electronics & Communications Company Limited | Over-temperature protecting apparatus and over-temperature protecting method thereof |
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