CN111552142A - Temperature-sensitive detection control system and method and projector - Google Patents
Temperature-sensitive detection control system and method and projector Download PDFInfo
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- CN111552142A CN111552142A CN202010532463.8A CN202010532463A CN111552142A CN 111552142 A CN111552142 A CN 111552142A CN 202010532463 A CN202010532463 A CN 202010532463A CN 111552142 A CN111552142 A CN 111552142A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
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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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Abstract
The invention provides a temperature-sensitive detection control system and method and a projector, wherein the temperature-sensitive detection control system comprises: the system comprises an acquisition module, a micro-processing module, a temperature control module, a driving module and a heat dissipation module, wherein the acquisition module, the micro-processing module and the temperature control module are sequentially connected with one another; the acquisition module comprises an NTC temperature-sensitive detection unit with an NTC temperature-sensitive resistor and an A/D conversion unit; the NTC temperature-sensitive detecting unit is used for collecting a voltage signal of the position of the NTC temperature-sensitive resistor; the A/D conversion unit is used for converting the voltage signal into a digital signal; the micro-processing module is used for comparing the received digital signals with prestored parameter information and outputting control instruction information corresponding to the comparison result to the temperature control module, so that the temperature control module controls the operation of the driving module and/or the heat dissipation module according to the control instruction information to adjust the temperature of the driving module and/or the heat dissipation module, the temperature detection precision is improved, and the safe and efficient work of the projector is ensured.
Description
Technical Field
The invention relates to the technical field of projectors, in particular to a temperature-sensitive detection control system and method and a projector.
Background
With the continuous development of the projector industry, the projector is applied to more and more occasions, and is gradually becoming another large information access terminal after a computer and a mobile phone, such as: news, music, video, games, video conferencing, etc. In practical application, a large amount of heat is generated in the working process of the projector, and if the heat is not processed in time, the projector is caused to break down due to overhigh temperature, so that the heat dissipation problem becomes a technical difficulty and a technical bottleneck of the high-brightness projector.
In order to alleviate the heat dissipation problem of the projector, the conventional method detects the internal temperature of the projector by arranging a temperature sensor, and although the temperature detection mode can realize the temperature detection of the projector, the problems of poor stability, limited structural installation and the like often exist, so that the temperature detection precision of the projector is not high, and the safe and efficient work of the projector cannot be ensured.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a temperature-sensitive detection control system and method and a projector, so as to alleviate the above problems and improve the temperature detection accuracy, thereby ensuring safe and efficient operation of the projector.
In a first aspect, an embodiment of the present invention provides a temperature-sensitive detection control system, where a projector includes: the system comprises an acquisition module, a micro-processing module, a temperature control module, a driving module and a heat dissipation module, wherein the acquisition module, the micro-processing module and the temperature control module are sequentially connected with one another; the acquisition module comprises an NTC temperature-sensitive detection unit with an NTC temperature-sensitive resistor and an A/D conversion unit;
the NTC temperature-sensitive detecting unit is used for collecting a voltage signal of the position of the NTC temperature-sensitive resistor;
the A/D conversion unit is used for converting the voltage signal into a digital signal and sending the digital signal to the micro-processing module;
the micro-processing module is used for comparing the received digital signal with pre-stored parameter information and outputting control instruction information corresponding to a comparison result to the temperature control module;
and the temperature control module is used for receiving the control instruction information and controlling the operation of the driving module and/or the heat dissipation module according to the control instruction information so as to adjust the temperature of the driving module and/or the heat dissipation module.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein a plurality of NTC temperature-sensitive detecting units are respectively disposed at different positions of the projector, and the plurality of NTC temperature-sensitive detecting units are all connected to the a/D conversion unit;
the micro-processing module includes: the microprocessor comprises a micro-processing unit and a memory connected with the micro-processing unit; the memory is used for storing parameter information respectively corresponding to the NTC temperature-sensitive detecting units;
the micro-processing unit is used for triggering the A/D conversion unit to switch the working circuit when the projector is started so as to convert the voltage signal of the NTC temperature-sensitive detection unit on the working circuit into a digital signal; and receiving the digital signal and generating control instruction information corresponding to the digital signal based on the parameter information stored in the memory.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the microprocessor module further includes a timer connected to the microprocessor unit;
and the micro-processing unit is also used for triggering the A/D conversion unit to switch the working circuit by taking the timing duration of the timer as a period.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the a/D conversion unit includes channels respectively connected to each NTC temperature-sensitive detection unit;
the A/D conversion unit is also used for switching channels under the trigger of the microprocessing unit so as to form a working line through the switched channels and the NTC temperature-sensitive detection unit and obtain a voltage signal of the NTC temperature-sensitive detection unit on the working line.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, wherein 2 NTC temperature-sensitive detection units are respectively disposed at the driving module and the heat dissipation module; or, the number of the NTC temperature-sensitive detecting units is 3, and the NTC temperature-sensitive detecting units are respectively arranged at the air outlets of the driving module, the heat dissipation module and the projector.
With reference to the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the temperature control module includes:
the compiling circuit is used for compiling the control instruction information to obtain first control instruction information used for controlling the driving module and/or second control instruction information used for controlling the heat dissipation module;
the first sending circuit is used for sending the first control instruction information to the driving module so that the driving module controls the operation according to the first control instruction information;
and the second sending circuit is used for sending the second control instruction information to the heat dissipation module so that the heat dissipation module controls the operation according to the second control instruction information.
With reference to the fifth possible implementation manner of the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where the driving module further includes:
and the adjusting circuit is used for adjusting the output power consumption according to the first control instruction information so as to adjust the temperature of the driving module.
With reference to the fifth possible implementation manner of the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, where the heat dissipation module further includes:
the control circuit is used for controlling the running power according to the second control instruction information so as to adjust the temperature of the heat dissipation module; wherein, the heat dissipation module comprises at least one of a fan, a liquid cooling radiator and a TEC refrigerator.
With reference to the first aspect, an embodiment of the present invention provides an eighth possible implementation manner of the first aspect, where the system further includes a serial bus;
the A/D conversion unit is also used for sending the digital signal to the micro-processing module through a serial port bus; wherein, the serial port bus comprises one or more of the following: I2C, SPI, and UART.
In a second aspect, an embodiment of the present invention further provides a temperature-sensitive detection control method, applied to the temperature-sensitive detection control system in the first aspect, where the method includes:
acquiring a digital signal of the position of the NTC temperature-sensitive resistor; the digital signal is obtained by converting a voltage signal of the position where the NTC temperature-sensitive resistor acquired by the NTC temperature-sensitive detecting unit is located through the A/D converting unit;
comparing the digital signal with prestored parameter information, and generating control instruction information according to the comparison result;
and sending the control instruction information to the control module to trigger the control module to control the operation of the driving module and/or the heat dissipation module according to the control instruction information so as to adjust the temperature of the driving module and/or the heat dissipation module.
In a third aspect, an embodiment of the present invention further provides a projector, where the projector is configured with the temperature-sensitive detection control system of the first aspect.
The embodiment of the invention has the following beneficial effects:
the invention provides a temperature-sensitive detection control system and method and a projector, wherein a voltage signal of the position of an NTC temperature-sensitive resistor is acquired by an NTC temperature-sensitive detection unit, the voltage signal is converted into a digital signal by an A/D conversion unit, a micro-processing module compares the received digital signal with pre-stored parameter information and outputs control instruction information corresponding to the comparison result to a temperature control module, so that the temperature control module controls the operation of a driving module and/or a heat dissipation module according to the control instruction information to adjust the temperature of the driving module and/or the heat dissipation module. Because the NTC (negative temperature Coefficient) temperature-sensitive resistor has high sensitivity, the temperature can be detected slightly, thereby improving the temperature detection precision and ensuring the safe and efficient work of the projector.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a temperature-sensitive detection control system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another temperature-sensitive detection control system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another temperature-sensitive detection control system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another temperature-sensitive detection control system according to an embodiment of the present invention;
fig. 5 is a flowchart of a temperature-sensitive detection control method according to an embodiment of the present invention;
fig. 6 is a flowchart of another temperature-sensitive detection control method according to an embodiment of the present invention.
Icon:
10-an acquisition module; 11-NTC temperature sensitive detecting unit; 12-A/D conversion unit; 20-a micro-processing module; 21-a microprocessing unit; 22-a memory; 23-a timer; 30-a temperature control module; 31-a compiling circuit; 32-a first transmitting circuit; 33-a second transmitting circuit; 40-a drive module; 41-laser driving unit; 50-a heat dissipation module; 51-a fan; 52-liquid-cooled heat sinks; 53-TEC refrigerator.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Aiming at the heat dissipation problem of the projector, the conventional method mainly adopts a temperature-sensitive chip as a detection and processing module, and the temperature-sensitive chip has a large volume, so that the temperature-sensitive chip cannot be accommodated in a narrow space, namely the temperature-sensitive chip cannot be arranged on a tiny part in the projector, and the detection position of the projector is limited. In addition, the temperature-sensitive chip transmits the detection signal to the micro-processing module and the temperature control module through the serial port, and due to the fact that the serial port wire is too long, signal interference and noise are serious, and even the circuit stability of the whole projector can be affected, the temperature-sensitive chip can achieve temperature detection of the projector, but the problems of low detection precision, poor stability, limited structural installation and the like exist.
In addition, the conventional method can also use a thermocouple as a temperature sensor to detect the internal temperature of the projector. However, in practical application, a great amount of signal modulation and conversion must be performed by using the thermocouple, and errors are introduced due to slight mishandling, so that the precision is reduced; the thermocouple is composed of two different metals, and can be corroded with time, so that the precision is reduced, deviation occurs, and the maintenance of the thermocouple in the projector is obviously not in line with the actual use requirement; and, the thermocouple is susceptible to noise interference of scattered electric field and magnetic field, thus causing detection errors, and therefore, using the thermocouple as a temperature sensor will result in low temperature detection precision, and cannot ensure safe and efficient operation of the projector, which causes inconvenience to users.
Based on the above problems, embodiments of the present invention provide a temperature-sensitive detection control system and method, and a projector, so as to alleviate the above problems and improve the temperature detection precision, thereby ensuring safe and efficient operation of the projector and improving the user experience.
To facilitate understanding of the present embodiment, a detailed description will be given below of a temperature-sensitive detection control system provided in an embodiment of the present invention.
The first embodiment is as follows:
an embodiment of the present invention provides a temperature-sensitive detection control system, such as a schematic structural diagram of the temperature-sensitive detection control system shown in fig. 1, where the temperature-sensitive detection control system includes: the system comprises an acquisition module 10, a micro-processing module 20, a temperature control module 30, a driving module 40 and a heat dissipation module 50, wherein the acquisition module, the micro-processing module 20 and the temperature control module 30 are connected in sequence; the acquisition module 10 includes an NTC temperature-sensitive detection unit 11 with an NTC temperature-sensitive resistor and an a/D conversion unit 12.
The NTC temperature-sensitive detecting unit 11 is used for collecting a voltage signal of a position where the NTC temperature-sensitive resistor is located; the a/D conversion unit 12 is configured to convert the voltage signal into a digital signal, and send the digital signal to the micro processing module 20; the microprocessor module 20 is configured to compare the received digital signal with pre-stored parameter information, and output control instruction information corresponding to the comparison result to the temperature control module 30; the temperature control module 30 is configured to receive the control instruction information, and control the operation of the driving module 40 and/or the heat dissipation module 50 according to the control instruction information, so as to adjust the temperature of the driving module 40 and/or the heat dissipation module 50.
In practical application, the NTC temperature-sensitive resistor is a thermistor with a negative temperature coefficient, the resistance of which decreases exponentially along with the temperature rise, has high sensitivity, and can sense the slight change of the temperature of a position to be measured. Therefore, the NTC temperature-sensitive detecting unit 11 can collect the voltage signal of the NTC temperature-sensitive resistor, convert the voltage signal into a digital signal through the a/D converting unit 12, and send the digital signal to the micro-processing module 20; at this time, the micro processing module 20 compares the received digital signal with the pre-stored parameter information, and outputs control instruction information corresponding to the comparison result to the temperature control module 30, so that the temperature control module 30 controls the operation of the driving module 40 and/or the heat dissipation module 50 according to the control instruction information, so as to adjust the temperature of the driving module 40 and/or the heat dissipation module 50, thereby solving the heat dissipation problem of the projector, ensuring that the projector can work safely and efficiently, and improving the experience of the user.
The embodiment of the invention provides a temperature-sensitive detection control system, which comprises: the system comprises an acquisition module, a micro-processing module, a temperature control module, a driving module and a heat dissipation module, wherein the acquisition module, the micro-processing module and the temperature control module are sequentially connected with one another; the acquisition module comprises an NTC temperature-sensitive detection unit with an NTC temperature-sensitive resistor and an A/D conversion unit; the NTC temperature-sensitive detecting unit is used for collecting a voltage signal of the position of the NTC temperature-sensitive resistor; the A/D conversion unit is used for converting the voltage signal into a digital signal and sending the digital signal to the micro-processing module; the micro-processing module is used for comparing the received digital signal with pre-stored parameter information and outputting control instruction information corresponding to a comparison result to the temperature control module; the temperature control module is used for receiving the control instruction information and controlling the operation of the driving module and/or the heat dissipation module according to the control instruction information so as to adjust the temperature of the driving module and/or the heat dissipation module. By adopting the NTC temperature-sensitive resistor to detect the temperature inside the projector, the temperature detection precision is improved, the safe and efficient work of the projector is ensured, and the experience degree of a user is improved.
In practical application, the NTC temperature-sensitive resistor has a small volume, the diameter is usually less than 2mm, and the cost is low, so that the NTC temperature-sensitive resistor can be configured into various physical forms and is convenient to arrange in a projector, thereby realizing temperature detection of tiny precise elements in the projector, realizing detection and processing separation, and not influencing the circuit stability of the projector. In addition, as shown in fig. 2, a plurality of NTC temperature-sensitive detecting units 11 may be respectively disposed at different positions of the projector, so as to detect the temperatures of a plurality of components inside the projector and avoid the malfunction of the projector due to an excessively high temperature.
Optionally, 2 NTC temperature-sensitive detecting units 11 are respectively disposed at the driving module 40 and the heat dissipating module 50; here, the NTC temperature-sensitive detecting unit 11 may be respectively disposed at the control power sources of the driving module 40 and the heat dissipating module 50, so as to respectively obtain voltage signals corresponding to the NTC temperature-sensitive resistors; or, the number of the NTC temperature-sensitive detecting units 11 may be 3, and the NTC temperature-sensitive detecting units are respectively disposed at the driving module 40, the heat dissipation module 50, and the air outlet of the projector, so as to detect the temperature of a plurality of components inside the projector, and avoid the projector from generating a fault due to an excessively high temperature. It should be noted that, in order to improve the temperature detection accuracy, the driving module 40, the heat dissipation module 50, and the NTC temperature-sensitive detection unit 11 at the air outlet may be repeatedly arranged, for example, at the air outlet of the projector, the NTC temperature-sensitive detection unit 11 is arranged at different positions of the air outlet, so as to improve the temperature detection at the air outlet of the projector; alternatively, at various components within the drive module 40, such as: the NTC temperature-sensitive detecting units 11 are respectively disposed at the wavelength conversion device and the color filter wheel to detect the temperatures of different components in the driving module 40, and therefore, the embodiments of the present invention do not limit the number and specific positions of the NTC temperature-sensitive detecting units 11.
In addition, as shown in fig. 2, a plurality of NTC temperature-sensitive detecting units 11 are connected to the a/D converting unit 12; the micro-processing module 20 comprises a micro-processing unit 21 and a memory 22 connected with the micro-processing unit 21; the memory 22 is configured to store parameter information corresponding to each of the NTC temperature-sensitive detecting units 11; at this time, the microprocessor unit 21 is configured to trigger the a/D conversion unit 12 to switch the working line when the projector is started, so as to convert the voltage signal of the NTC temperature-sensitive detection unit 11 on the working line into a digital signal; and receiving the digital signal and generating control instruction information corresponding to the digital signal based on the parameter information stored in the memory 22.
Specifically, as shown in fig. 2, the microprocessor module 20 further includes a timer 23 connected to the microprocessor unit 21; when the projector is started, the microprocessor unit 21 triggers the timer 23 to start timing, and triggers the a/D conversion unit 12 to switch the working line with the timing duration of the timer 23 as a period. Optionally, a timing duration of 10ms of the timer 23 is defined as a period, and when the timing duration of the timer 23 is an integer multiple of 10ms, the micro processing unit 21 triggers the a/D conversion unit 12 to switch the working line, so as to convert the voltage signal of the NTC temperature-sensitive detection unit 11 on the working line into a digital signal; and receiving the digital signal and generating control instruction information corresponding to the digital signal based on the parameter information stored in the memory 22. The parameter information comprises corresponding relations between resistance values and voltage values of the NTC temperature-sensitive resistors at different temperatures.
In addition, the a/D conversion unit 12 further includes a channel respectively connected to each NTC temperature-sensitive detection unit 11; the a/D conversion unit 12 is further configured to switch channels under the trigger of the microprocessor unit 21, so as to form a working line with the NTC temperature-sensitive detection unit 11 through the switched channels, and obtain a voltage signal of the NTC temperature-sensitive detection unit 11 on the working line.
Optionally, for a plurality of channels of the a/D conversion unit 12, a successive switching manner may be adopted to perform switching intermittently; for example: the position of the NTC temperature-sensitive detecting unit 11 connected to each channel is defined in the micro-processing unit 21, for example, the NTC temperature-sensitive detecting unit 11 connected to the channel 1 is disposed at the air outlet of the projector, the NTC temperature-sensitive detecting unit 11 connected to the channel 2 is disposed at the driving module 40 of the projector, and so on, so that with the timing duration of the timer 23 as a cycle, the micro-processing unit 21 triggers the a/D converting unit 12 to switch channels according to a switching sequence, so as to form a working line with the switched channels and the NTC temperature-sensitive detecting unit 11, for example, the a/D converting unit 12 is triggered to switch to the channel 1 at 10ms, so as to obtain the voltage signal collected by the NTC temperature-sensitive detecting unit 11 at the air outlet of the projector, the a/D converting unit 12 is triggered to switch to the channel 2 at 20ms, so as to obtain the voltage signal collected by the NTC temperature-, the timing duration of the timer 23, the setting position and the switching sequence of the NTC temperature-sensitive detecting unit 11 corresponding to each channel, etc. may be set according to the actual application, and the embodiment of the present invention is not limited to be described herein.
The microprocessor 21 receives the digital signal transmitted from the a/D converter 12, and generates control instruction information corresponding to the digital signal based on the parameter information stored in the memory 22. The parameter information includes the corresponding relationship between the resistance value and the voltage value of the NTC temperature-sensitive resistor at different temperatures, and also includes a preset voltage value, so as to compare the digital signal with the preset voltage value, and when the digital signal exceeds the preset voltage value, the micro-processing unit 21 generates control instruction information corresponding to the digital signal, and sends the control instruction information to the temperature control module 30.
At this time, the temperature control module 30 further includes a compiling circuit 31, a first sending circuit 32 and a second sending circuit 33, as shown in fig. 3, where the compiling circuit 31 is configured to compile control instruction information to obtain first control instruction information for controlling the driving module 40 and/or second control instruction information for controlling the heat dissipation module 50; the first sending circuit 32 is configured to send the first control instruction information to the driving module 40, so that the driving module 40 controls operation according to the first control instruction information; the second sending circuit 33 is configured to send the second control instruction information to the heat dissipation module 50, so that the heat dissipation module 50 controls operation according to the second control instruction information.
Specifically, the driving module 40 further includes an adjusting circuit (not shown) for adjusting the output power consumption according to the first control instruction information to adjust the temperature of the driving module 40; the heat dissipation module 50 further includes a control circuit (not shown) for controlling the operation power according to the second control instruction information to adjust the temperature of the heat dissipation module 50; the heat dissipation module 50 includes at least one of a fan, a liquid-cooled heat sink, and a TEC (semiconductor Cooler) Cooler.
This is illustrated here for ease of understanding. As shown in fig. 4, the driving module 40 includes a laser driving unit 41, and at this time, the adjusting circuit adjusts the output power consumption of the laser driving unit according to the first control instruction information to control the heating power consumption of the laser driving unit, and optionally, reduces the output power consumption of the laser driving unit to reduce the output current of the laser driving unit, so as to reduce the brightness of the projector, to reduce the heating power consumption of the laser driving unit, and to reduce the temperature of the driving module 40. The heat dissipation module 50 includes a fan 51, a liquid cooling radiator 52 and a TEC refrigerator 53, and optionally, for the TEC refrigerator 53, the control circuit adjusts the cooling power according to the second control instruction information, thereby achieving the effect of protecting key devices such as a DMD (digital micromirror Device), a light source transmitter, and the like; for the liquid cooling radiator 52, the control circuit adjusts the flow rate of the refrigerant liquid according to the second control instruction information, so that the temperature of the liquid cooling radiator 52 is constant to a temperature value corresponding to the preset voltage value; the fan 51 further includes a D/a conversion unit (not shown), and the control circuit sends the second control instruction information to the D/a conversion unit, so that the D/a conversion unit converts the second control instruction information into corresponding voltage information, and sends the voltage information to the fan driving circuit, so that the fan driving circuit controls the voltage of the fan 51 according to the voltage information corresponding to the second control instruction information, and adjusts the heat dissipation power of the fan 51, so as to adjust the temperature of the fan 51, and achieve the balance between temperature control and overall power consumption control of the projector.
Further, the temperature-sensitive detection control system further comprises a serial port bus; the a/D conversion unit 12 is further configured to send the digital signal to the microprocessor module 20 through a serial bus; wherein, the serial port bus comprises one or more of the following: I2C (Inter-Integrated Circuit, I2C bus), SPI (Serial Peripheral Interface), and UART (Universal Asynchronous Receiver/Transmitter). The a/D conversion unit 12 sends the digital signal to the microprocessor 20 through the serial bus, so that the serial bus is prevented from being interfered by external noise due to direct connection with the serial bus, and the temperature detection precision is improved.
Further, the NTC temperature-sensitive resistor may include one or more of the following: the temperature sensor comprises a patch NTC temperature-sensitive resistor, a glass-sealed NTC temperature-sensitive resistor, an epoxy-packaged NTC temperature-sensitive resistor and a film type NTC temperature-sensitive resistor, wherein the glass-sealed NTC temperature-sensitive resistor, the epoxy-packaged NTC temperature-sensitive resistor, the film type NTC temperature-sensitive resistor and the like are firm in physical structure of the packaged NTC temperature-sensitive resistors and have good corrosion resistance and attenuation resistance, so that the repair probability caused by the fault of the temperature sensor can be greatly reduced.
Example two:
on the basis of the above embodiment, an embodiment of the present invention further provides a temperature-sensitive detection control method, which is applied to the temperature-sensitive detection control system, wherein the temperature-sensitive detection control system includes: the system comprises an acquisition module, a micro-processing module, a temperature control module, a driving module and a heat dissipation module, wherein the acquisition module, the micro-processing module and the temperature control module are sequentially connected with one another; the acquisition module comprises an NTC temperature-sensitive detection unit with an NTC temperature-sensitive resistor and an A/D conversion unit; as shown in fig. 5, a flow chart of a temperature-sensitive detection control method includes the following steps:
step S102, acquiring a digital signal of the position of the NTC temperature-sensitive resistor;
the digital signal is obtained by converting a voltage signal of the position of the NTC temperature-sensitive resistor collected by the NTC temperature-sensitive detection unit through the A/D conversion unit.
Step S104, comparing the digital signal with prestored parameter information, and generating control instruction information according to the comparison result;
and step S106, sending the control instruction information to the control module to trigger the control module to control the operation of the driving module and/or the heat dissipation module according to the control instruction information so as to adjust the temperature of the driving module and/or the heat dissipation module.
According to the temperature-sensitive detection control method provided by the embodiment of the invention, a digital signal of the position of the NTC temperature-sensitive resistor is obtained; the digital signal is obtained by converting a voltage signal of the position where the NTC temperature-sensitive resistor acquired by the NTC temperature-sensitive detecting unit is located through the A/D converting unit; comparing the digital signal with prestored parameter information, and generating control instruction information according to the comparison result; and the control instruction information is sent to the control module to trigger the control module to control the operation of the driving module and/or the heat dissipation module according to the control instruction information so as to adjust the temperature of the driving module and/or the heat dissipation module, so that the temperature detection precision is improved, and the safe and efficient work of the projector is ensured.
The NTC temperature-sensitive detecting units are respectively arranged at different positions of the projector and are connected with the A/D conversion unit; the micro-processing module includes: the microprocessor comprises a micro-processing unit and a memory connected with the micro-processing unit; the memory is used for storing parameter information respectively corresponding to the NTC temperature-sensitive detecting units; the method further comprises the following steps:
when the projector is started, the A/D conversion unit is triggered to switch the working circuit, so that the voltage signal of the NTC temperature-sensitive detection unit on the working circuit is converted into a digital signal;
and receiving the digital signal, and generating control instruction information corresponding to the digital signal based on the parameter information stored in the memory.
The micro-processing module also comprises a timer connected with the micro-processing unit; the method further comprises the following steps: and triggering the A/D conversion unit to switch the working line by taking the timing duration of the timer as a period.
The A/D conversion unit comprises a channel respectively connected with each NTC temperature-sensitive detection unit; the A/D conversion unit switches channels under the trigger of the micro-processing unit, so that a working line is formed by the switched channels and the NTC temperature-sensitive detection unit, and a voltage signal of the NTC temperature-sensitive detection unit on the working line is acquired.
The number of the NTC temperature-sensitive detection units is 2, and the NTC temperature-sensitive detection units are respectively arranged at the driving module and the radiating module; or, the number of the NTC temperature-sensitive detecting units is 3, and the NTC temperature-sensitive detecting units are respectively arranged at the air outlets of the driving module, the heat dissipation module and the projector.
The temperature control module includes: the compiling circuit is used for compiling the control instruction information to obtain first control instruction information used for controlling the driving module and/or second control instruction information used for controlling the heat dissipation module; the first sending circuit is used for sending the first control instruction information to the driving module so that the driving module controls the operation according to the first control instruction information; and the second sending circuit is used for sending the second control instruction information to the heat dissipation module so that the heat dissipation module controls the operation according to the second control instruction information.
The above-mentioned drive module still includes: and the adjusting circuit is used for adjusting the output power consumption according to the first control instruction information so as to adjust the temperature of the driving module.
The heat dissipation module further includes: the control circuit is used for controlling the running power according to the second control instruction information so as to adjust the temperature of the heat dissipation module; wherein, the heat dissipation module comprises at least one of a fan, a liquid cooling radiator and a TEC refrigerator.
Furthermore, the system also comprises a serial port bus; the A/D conversion unit sends the digital signal to the micro-processing module through a serial port bus; wherein, the serial port bus comprises one or more of the following: I2C, SPI, and UART.
On the basis of the foregoing embodiments, another temperature-sensitive detection control method is further provided in the embodiments of the present invention, as shown in fig. 6, which is a flowchart of another temperature-sensitive detection control method, and the method includes the following steps:
step S22, acquiring a voltage signal of the position of the NTC temperature-sensitive resistor through the NTC temperature-sensitive detecting unit;
specifically, when the projector is started, the NTC temperature-sensitive resistor detects the temperature of the projector, and the NTC temperature-sensitive detecting unit collects a voltage signal of the position where the NTC temperature-sensitive resistor is located;
step S24, converting the voltage signal into a digital signal through the A/D conversion unit, and sending the digital signal to the micro-processing module through the serial port bus;
step S26, the microprocessor module compares the received digital signal with the pre-stored parameter information and outputs the control instruction information corresponding to the comparison result to the temperature control module;
specifically, the microprocessor unit in the microprocessor module reads parameter information prestored in the memory, and compares the digital signal with the prestored parameter information, thereby outputting control instruction information corresponding to the comparison result to the temperature control module.
Step S28, the temperature control module compiles the control instruction information to obtain first control instruction information for controlling the driving module and/or second control instruction information for controlling the heat dissipation module, and sends the first control instruction information to the driving module and the second control instruction information to the heat dissipation module;
specifically, the driving module includes a laser driving unit, and the heat dissipation module includes a fan, a liquid cooling radiator, and a TEC cooler.
Step S30, the laser driving unit adjusts output power consumption according to the first control instruction information so as to control heating power consumption;
specifically, the adjusting circuit in the driving module adjusts the output power consumption of the laser driving unit according to the first control instruction information to control the heating power consumption of the laser driving unit, and optionally, the output power consumption of the laser driving unit is reduced to enable the laser driving unit to reduce the output current, so that the brightness of the projector is reduced to reduce the heating power consumption of the laser driving unit and reduce the temperature of the driving module.
Step S32, adjusting the refrigeration power by the TEC refrigerator according to the second control instruction information;
specifically, for the TEC refrigerator, the control circuit in the heat dissipation module adjusts the cooling power according to the second control instruction information, thereby achieving the effect of protecting key devices such as the DMD and the light source transmitter.
Step S34, the liquid cooling radiator adjusts the flow rate of the refrigerating fluid according to the second control instruction information;
specifically, for the liquid cooling radiator, the control circuit in the heat dissipation module adjusts the flow rate of the cooling liquid according to the second control instruction information, so that the temperature of the liquid cooling radiator is constant to a temperature value corresponding to the preset voltage value.
Step S36, the D/a conversion unit converts the second control instruction information into corresponding voltage information, and sends the voltage information to the fan driving circuit;
specifically, for the fan, the heat dissipation module further includes a D/a conversion unit, and the control circuit sends the second control instruction information to the D/a conversion unit, so that the D/a conversion unit converts the second control instruction information into corresponding voltage information, and sends the voltage information to the fan driving circuit.
In step S38, the fan driving circuit controls the fan voltage power according to the voltage information corresponding to the second control instruction information.
Specifically, the fan driving circuit controls the voltage of the fan according to the voltage information corresponding to the second control instruction information, and adjusts the heat dissipation power of the fan to adjust the temperature of the fan, so as to achieve the balance between temperature control and overall power consumption control of the projector.
The temperature-sensitive detection control method provided by the embodiment of the invention has the same technical characteristics as the temperature-sensitive detection control system provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
Further, on the basis of the above embodiment, an embodiment of the present invention further provides a projector, and the projector is configured with the above temperature-sensitive detection control system.
The embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and when the processor executes the computer program, the steps of the temperature-sensitive detection control method provided in the foregoing embodiment are implemented.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the temperature-sensitive detection control method in the foregoing embodiment are executed.
The computer program product provided in the embodiment of the present invention includes a computer-readable storage medium storing a program code, where instructions included in the program code may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment, which is not described herein again.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the temperature-sensitive detection control method described above may refer to the corresponding process of the temperature-sensitive detection control system in the foregoing embodiment, and is not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (11)
1. A temperature-sensitive detection control system, the system comprising: the system comprises an acquisition module, a micro-processing module, a temperature control module, a driving module and a heat dissipation module, wherein the acquisition module, the micro-processing module and the temperature control module are sequentially connected with one another; the acquisition module comprises an NTC temperature-sensitive detection unit with an NTC temperature-sensitive resistor and an A/D conversion unit;
the NTC temperature-sensitive detecting unit is used for collecting a voltage signal of the position of the NTC temperature-sensitive resistor;
the A/D conversion unit is used for converting the voltage signal into a digital signal and sending the digital signal to the micro-processing module;
the micro-processing module is used for comparing the received digital signal with pre-stored parameter information and outputting control instruction information corresponding to a comparison result to the temperature control module;
the temperature control module is used for receiving the control instruction information and controlling the operation of the driving module and/or the heat dissipation module according to the control instruction information so as to adjust the temperature of the driving module and/or the heat dissipation module.
2. The temperature-sensitive detection control system according to claim 1, wherein the NTC temperature-sensitive detection units are disposed at different positions of the projector, respectively, and are connected to the a/D conversion unit;
the micro-processing module comprises: the device comprises a micro-processing unit and a memory connected with the micro-processing unit; the memory is used for storing parameter information corresponding to the NTC temperature-sensitive detecting units respectively;
the micro-processing unit is used for triggering the A/D conversion unit to switch a working line when the projector is started so as to convert a voltage signal of the NTC temperature-sensitive detection unit on the working line into a digital signal; and receiving the digital signal, and generating control instruction information corresponding to the digital signal based on the parameter information stored in the memory.
3. The temperature-sensitive detection control system according to claim 2, wherein the microprocessor module further comprises a timer connected to the microprocessor unit;
the microprocessor unit is further configured to trigger the a/D conversion unit to switch the working line with a timing duration of the timer as a cycle.
4. The temperature-sensitive detection control system according to claim 2, wherein the a/D conversion unit comprises a channel respectively connected to each of the NTC temperature-sensitive detection units;
the A/D conversion unit is also used for switching the channel under the trigger of the micro-processing unit so as to form a working line through the switched channel and the NTC temperature-sensitive detection unit and obtain a voltage signal of the NTC temperature-sensitive detection unit on the working line.
5. The temperature-sensitive detection control system according to claim 2, wherein the number of the NTC temperature-sensitive detection units is 2, and the NTC temperature-sensitive detection units are respectively disposed at the driving module and the heat dissipation module;
or, the number of the NTC temperature-sensitive detecting units is 3, and the NTC temperature-sensitive detecting units are respectively arranged at the air outlets of the driving module, the heat dissipation module and the projector.
6. The temperature-sensitive detection control system according to claim 1, wherein the temperature control module comprises:
the compiling circuit is used for compiling the control instruction information to obtain first control instruction information used for controlling the driving module and/or second control instruction information used for controlling the heat dissipation module;
the first sending circuit is used for sending the first control instruction information to the driving module so as to enable the driving module to control the operation according to the first control instruction information;
and the second sending circuit is used for sending the second control instruction information to the heat dissipation module so as to enable the heat dissipation module to control the operation according to the second control instruction information.
7. The temperature-sensitive detection control system according to claim 6, wherein the driving module further comprises:
and the adjusting circuit is used for adjusting output power consumption according to the first control instruction information so as to adjust the temperature of the driving module.
8. The temperature-sensitive detection control system according to claim 6, wherein the heat dissipation module further comprises:
the control circuit is used for controlling the running power according to the second control instruction information so as to adjust the temperature of the heat dissipation module; wherein, the heat dissipation module comprises at least one of a fan, a liquid cooling radiator and a TEC refrigerator.
9. The temperature-sensitive detection control system according to claim 1, wherein the system further comprises a serial bus;
the A/D conversion unit is also used for sending the digital signal to the micro-processing module through the serial port bus; wherein the serial port bus comprises one or more of the following: I2C, SPI, and UART.
10. A temperature-sensitive detection control method applied to the temperature-sensitive detection control system according to any one of claims 1 to 9, the method comprising:
acquiring a digital signal of the position of the NTC temperature-sensitive resistor; the digital signal is obtained by converting the voltage signal of the position where the NTC temperature-sensitive resistor is collected by the NTC temperature-sensitive detection unit through the A/D conversion unit;
comparing the digital signal with prestored parameter information, and generating control instruction information according to the comparison result;
and sending the control instruction information to the control module to trigger the control module to control the operation of the driving module and/or the heat dissipation module according to the control instruction information so as to adjust the temperature of the driving module and/or the heat dissipation module.
11. A projector equipped with the temperature-sensitive detection control system according to any one of claims 1 to 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113643616A (en) * | 2021-08-13 | 2021-11-12 | 宁波视睿迪光电有限公司 | Display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113643616A (en) * | 2021-08-13 | 2021-11-12 | 宁波视睿迪光电有限公司 | Display device |
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