CN111240136B - Projection system with intelligent heat dissipation function - Google Patents
Projection system with intelligent heat dissipation function Download PDFInfo
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- CN111240136B CN111240136B CN202010178055.7A CN202010178055A CN111240136B CN 111240136 B CN111240136 B CN 111240136B CN 202010178055 A CN202010178055 A CN 202010178055A CN 111240136 B CN111240136 B CN 111240136B
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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
- 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
- G03B21/145—Housing details, e.g. position adjustments thereof
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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
- G03B21/54—Accessories
Abstract
The invention discloses a projection system with an intelligent heat dissipation function, which comprises an intelligent adjusting base, a closed metal shell and a flexible connecting piece, wherein the intelligent adjusting base is provided with a heat dissipation hole; the intelligent adjusting base is a first cuboid, the height of the intelligent adjusting base is smaller than the length and the width of the intelligent adjusting base, the closed metal shell is a second cuboid, the height of the closed metal shell is larger than the length or the width of the closed metal shell, and the flexible connecting piece is a flexible strip member; the intelligent regulation base is in lie in the lower in the projection system, confined metal casing with intelligent regulation base lug connection, be located on the intelligent regulation base, first cuboid with the second cuboid forms the third cuboid. The projection system with the intelligent heat dissipation function can improve the heat dissipation and self-adjustment performance of projection.
Description
Technical Field
The invention relates to the field of projection, in particular to a projection system with an intelligent heat dissipation function.
Background
With the increasingly widespread use of intelligent mobile terminals and the explosive development of mobile networks, users mostly adopt smaller-sized intelligent mobile terminals to play video works such as dramas and movies. Although, the tv is still a common facility in every home, it is too large and fixed to meet the viewing requirements of users anytime and anywhere.
However, when a user directly gazes at a small-sized smart mobile terminal for a long time, eye fatigue will be caused, and finally vision impairment is caused. Therefore, portable projecting apparatus arises by oneself, and it can be with the video projection of user's broadcast on intelligent Mobile terminal on curtain or wall for the area that the user can watch is great, and because the sight is direct not to contact with intelligent Mobile terminal's display screen, can not cause the harm of eyesight, is received and likes by extensive family. However, the portable projector in the prior art is generally not large in size due to its portable design, and requires a user to find a suitable height and position for the portable projector so that the user can comfortably watch videos after the portable projector works, but such a need cannot be met well because the user does not have time or cannot find the most suitable height and position at all, and secondly, the height and position adjustment is generally required to be achieved by means of other cabinets such as a television cabinet, and along with the change of the geographical position watched by the user, it is likely that the cabinet which can meet the user's needs before now cannot be met. In addition, the heat dissipation effect of the projector in the prior art is very poor, which results in that the projector starts to generate heat after working for a short time, and the efficiency and the user safety of the projector are seriously affected.
Disclosure of Invention
The invention provides a projection system with an intelligent heat dissipation function, which is characterized by comprising an intelligent adjusting base, a closed metal shell and a flexible connecting piece, wherein the intelligent adjusting base is arranged on the projection system; the intelligent adjusting base is a first cuboid, the height of the intelligent adjusting base is smaller than the length and the width of the intelligent adjusting base, the closed metal shell is a second cuboid, the height of the closed metal shell is larger than the length or the width of the closed metal shell, and the flexible connecting piece is a flexible strip member; the intelligent adjusting base is located at the lowest position in the projection system, the closed metal shell is directly connected with the intelligent adjusting base and located on the intelligent adjusting base, and the first cuboid and the second cuboid form a third cuboid; one end of the flexible strip member is detachably connected with the upper end of the left side face of the metal shell, and the other end of the flexible strip member is detachably connected with the upper end of the right side face of the metal shell.
The upper end of the front side surface of the metal shell is provided with a camera and a projection lens; a first through hole with a first size in diameter and penetrating through the left side face is distributed on the left side face of the metal shell; a second through hole which has the first size and penetrates through the right side face is distributed on the right side face of the metal shell; the upper side and the lower side of the metal shell are metal flat plates; the rear side face upper end of the metal shell is provided with a third through hole with a hole diameter of a second size and penetrating through the rear side face, and the rear side face lower end of the metal shell is provided with a fourth through hole with a hole diameter of a third size and penetrating through the rear side face and a fifth through hole with a hole diameter of a fourth size and penetrating through the rear side face.
The first through hole and the second through hole are used for passing audio.
And the third through hole, the fourth through hole and the fourth-fifth through hole are used for heat dissipation.
The first through hole and the second through hole are circular.
The third through hole, the fourth through hole and the fourth through hole are oval.
The diameter of the circle is smaller than the minor radius of the ellipse.
The long radius and the short radius of the third through hole are respectively larger than the long radius and the short radius of the fourth through hole; the long radius and the short radius of the fourth through hole are respectively larger than the long radius and the short radius of the fifth through hole.
A power interface is arranged at the center of the lower side surface of the metal shell; the metal shell is internally provided with an MCU and a battery; a display screen and a voice prompter are arranged in the middle of the front side surface of the metal shell; the MCU detects the residual electric quantity level of the battery in real time and transmits the detected residual electric quantity to the display screen in a percentage mode, and the display screen displays the residual electric quantity percentage of the battery in real time; the MCU judges the difference between the real-time detected residual electric quantity level and a preset electric quantity threshold value based on the real-time detected residual electric quantity level, if the difference is smaller than 0, the MCU outputs an alarm instruction to the voice prompter, if the difference is larger than 0, the MCU sets next judgment starting time based on the size of the difference, when the difference is larger, the MCU sets larger next judgment starting time, when the difference is smaller, the MCU sets smaller next judgment starting time, when the timing number of a timing part in the MCU reaches the next judgment starting time, the MCU judges the difference between the real-time detected residual electric quantity level and the preset electric quantity threshold value again, and the cycle is repeated until the difference is smaller than 0; and the voice prompter outputs voice information capable of representing low electric quantity after receiving the alarm instruction so as to remind a user to charge the projection system through the power interface.
And a power conversion circuit is also arranged in the metal shell. The input end of the power conversion circuit is directly connected with the power interface, the output end of the power conversion circuit is directly connected with the battery, and the power conversion circuit is used for converting single-phase power grid alternating current power received from the power interface into direct current power which can supply power for the battery and meets the safety protection level of the projection system.
The power conversion circuit comprises a first alternating current input end, a second alternating current input end, capacitors C1, C2, C3 and C4, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11 and R12, mosfet switching tubes S1 and S2, diodes D1, D2, D3, D4 and D5 and a transformer T; the transformer T comprises a primary side L1 of the transformer and a secondary side L2 of the transformer; one end of the primary side L1 of the transformer is directly connected with the first alternating current input end, and the other end of the primary side L1 of the transformer is directly connected with the second alternating current input end; one end of the secondary side L2 of the transformer is directly connected to the anode of the diode D1, the other end of the secondary side L2 of the transformer is directly connected to one end of the resistor R6, and the other end of the resistor R6 is directly connected to the source of the mosfet switch tube S2; the anode of the diode D1 is also directly connected with one end of the resistor R1, the cathode of the diode D1 is directly connected with one end of the capacitor C1, and the other end of the capacitor C1 is directly connected with the other end of the resistor R1; one end of the resistor R2 is directly connected with the cathode of the diode D1, the other end of the resistor R2 is directly connected with one end of the resistor R11, and the other end of the resistor R11 is directly connected with one end of the resistor R6; one end of the resistor R3 is directly connected with the cathode of the diode D1, the other end of the resistor R3 is directly connected with the anode of the diode D2, and the cathode of the diode D2 is directly connected with the drain of the mosfet switch tube S1; one end of the capacitor C2 is directly connected with the other end of the resistor R2, and the other end of the capacitor C2 is directly connected with the drain electrode of the mosfet switch tube S1; the base of the mosfet switch tube S1 is directly connected to one end of the capacitor C2, and the source of the mosfet switch tube S1 is directly connected to the other end of the resistor R11; one end of the resistor R4 is directly connected to the cathode of the diode D1, the other end of the resistor R4 is directly connected to one end of the capacitor C3, and the other end of the capacitor C3 is directly connected to the base of the mosfet switch tube S2; one end of the resistor R7 is directly connected with the base of the mosfet switch tube S1, the other end of the resistor R7 is directly connected with the cathode of the diode D3, and the anode of the diode D3 is directly connected with the base of the mosfet switch tube S2; one end of the resistor R8 is directly connected with the cathode of the diode D1, and the other end of the resistor R8 is directly connected with the base electrode of the mosfet switch tube S2; one end of the resistor R12 is directly connected with the source electrode of the mosfet switch tube S1, and the other end of the resistor R12 is directly connected with the base electrode of the mosfet switch tube S2; one end of the resistor R9 is directly connected with the cathode of the diode D1, and the other end of the resistor R9 is directly connected with the cathode of the diode D4; the anode of the diode D4 is directly connected to the cathode of the diode D1, the cathode of the diode D4 is also directly connected to one end of the resistor R10, and the other end of the resistor R10 is directly connected to the drain of the mosfet switch tube S2; the anode of the diode D5 is directly connected to the cathode of the diode D1, the cathode of the diode D5 is directly connected to one end of the resistor R5, and the other end of the resistor R5 is directly connected to the source of the mosfet switch tube S2; one end of the capacitor C4 is directly connected with the anode of the diode D5 and is used as a first anode direct current output end of the power conversion circuit; the other end of the capacitor C4 is directly connected to the source of the mosfet switch tube S2, and serves as a first negative dc output end of the power conversion circuit; the first positive direct current output end is connected with the positive pole of the battery, and the first negative direct current output end is connected with the negative pole of the battery.
An aluminum radiating fin and an intelligent fan are further arranged in the metal shell; the aluminum radiating fins are fixed on the upper side or the lower side or the upper side and the lower side of the interior of the metal shell; the intelligent fan is fixed on the rear side surface inside the metal shell; the intelligent fan is in communication connection with the MCU and automatically and intelligently adjusts the running speed of the intelligent fan based on the control of the MCU.
After the projection system starts to work, the MCU outputs a first-stage instruction to the intelligent fan, and the intelligent fan runs at a first preset low rotating speed; the MCU steplessly adjusts the rotating speed of the intelligent fan in real time based on the volume of the audio file played by the projection system in real time, so that when the volume is large, the rotating speed is large, when the volume is small, the rotating speed is small, and the noise which is enough to influence the user experience and is brought by the operation of the intelligent fan is avoided while the cooling is guaranteed.
When the intelligent fan runs at a first preset low rotating speed, the noise generated by the intelligent fan should not exceed 25 decibels.
The MCU is pre-stored with a mapping relation table between the rotating speed of the intelligent fan and the noise generated by the intelligent fan; when the projection system plays an audio file in real time, the MCU acquires the volume of the audio file in real time and calculates the maximum noise which can be generated by the intelligent fan based on the volume; and the MCU obtains the maximum rotating speed of the intelligent fan based on the maximum noise and the mapping relation table.
The maximum noise which can be generated by the intelligent fan can be obtained by multiplying the volume of the audio file by a predetermined coefficient which is less than 1, wherein the predetermined coefficient is set so that the noise generated by the intelligent fan is covered by the volume of the audio file and the influence of the noise on the volume cannot be perceived by human ears.
A temperature sensor is further arranged in the metal shell and is arranged near the projection lens; after the projection system starts to work, the temperature sensor detects the temperature in real time and transmits the temperature to the MCU in real time; the MCU judges whether the temperature is greater than a temperature threshold value, if so, the intelligent fan is controlled to operate at the maximum rotating speed, otherwise, the intelligent fan is controlled to operate at a second variable rotating speed lower than the maximum rotating speed, and when the temperature is closer to the temperature threshold value, the second variable rotating speed is closer to the maximum rotating speed; the second variable rotation speed is greater than the first preset low rotation speed.
The intelligent adjusting base comprises a base body, a first lifting mechanism, a second lifting mechanism, a first intelligent motor, a second intelligent motor and an energy storage element; one end of the first lifting mechanism is fixedly connected to one side of the upper surface of the base body, and the other end of the first lifting mechanism is fixedly connected to one side of the lower side surface of the metal shell; one end of the second lifting mechanism is fixedly connected to the other side edge of the upper surface of the base body, and the other end of the second lifting mechanism is fixedly connected to the other side edge of the lower side surface of the metal shell; one side of the upper surface and the other side of the upper surface are oppositely arranged, and one side of the lower side surface and the other side of the lower side surface are oppositely arranged; the first intelligent motor, the second intelligent motor and the energy storage element are arranged in the base body; the first intelligent motor is connected with the first lifting mechanism and used for providing lifting power for the first intelligent motor, the second intelligent motor is connected with the second lifting mechanism and used for providing lifting power for the second intelligent motor, and the energy storage element is directly connected with the first intelligent motor and the second intelligent motor respectively and used for providing power supply for the first intelligent motor and the second intelligent motor.
When the projection system is shut down each time, the MCU sends a reply instruction to the first intelligent motor and the second intelligent motor; first intelligent motor, second intelligent motor are receiving control respectively behind the reply instruction first, second elevating system reconversion for the two is held again between base body and the metal casing, make first cuboid and second cuboid direct contact.
A first infrared ranging module is further arranged at the upper end of the front side face of the metal shell and is close to the projection lens; still be provided with the infrared range finding module of second on the last side of metal casing, the infrared range finding module of second is close to projection lens sets up.
After the projection system is started, the projection system starts workingBefore outputting audio or video or audio and video, the first infrared ranging module and the second infrared ranging module start to work; the user lifts the projection system and lifts the projection system to be close to human eyes, the posture is kept for a preset time, the first infrared ranging module and the second infrared ranging module respectively measure a first distance d1 and a second distance d2, and the first distance and the second distance are transmitted to the MCU; after the user places the projection system at a certain position, the first infrared ranging module and the second infrared ranging module respectively measure a third distance d3 and a fourth distance d4, and transmit the third distance and the fourth distance to the MCU; the MCU judges
Whether or not, wherein thetaupAt a predetermined upward viewing angle, thetadownThe preset elevation angle or the preset overlook angle is the maximum elevation angle or overlook angle which enables a user to feel comfortable, and if the maximum elevation angle or the overlook angle is met, the MCU calculates the radiation angle of the projection lens
The radiation angle is an included angle between the highest light ray emitted upwards by the projection lens and the horizontal plane, and the projection lens is controlled to be adjusted according to the radiation angle; if not, the MCU judges whether d4 is larger than d4
If yes, the MCU outputs a rising instruction with specific parameters to the first intelligent motor and the second intelligent motor, so that the first lifting mechanism and the second lifting mechanism rise simultaneously
The specific parameter can indicate the distance to be raised, and then the MCU calculates the radiation angle of the projection lens
The radiation angle is an included angle between the highest light ray emitted upwards by the projection lens and the horizontal plane, and the projection lens is controlled to be adjusted according to the radiation angle; if the MCU judges that d4 is less than
The MCU outputs a reminding message to the voice prompter, and the voice prompter outputs voice to remind a user to place the projection system at a low position.
The beneficial technical effects obtained by the invention are as follows:
1. good heat dissipation performance is achieved by adopting the metal shell, the aluminum radiating fins, the through holes with various specifications and the fan;
2. the rotating speed of the fan is adjusted based on the volume, so that the using effect of a user cannot be influenced while heat is dissipated, and meanwhile, the designed temperature sensor is matched with the rotating speed of the fan in a coordinated mode, so that unnecessary heat dissipation is avoided;
3. the arranged alternating current single-phase conversion circuit enables the conversion efficiency of the power to be extremely high;
4. the lifting base is arranged, so that the height of the projection system can be adjusted in a self-adaptive manner;
5. the distance measurement module that cooperation MCU used has realized the perfect measurement of the most comfortable field of vision scope to through control elevating system, realize that projection system can present the video that accords with user's visual angle completely.
Drawings
The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. In the drawings, like reference numerals designate corresponding parts throughout the different views.
Fig. 1 is a composition diagram of the projection system with intelligent heat dissipation function of the present invention when it is raised.
Fig. 2 is a circuit diagram of a power conversion circuit of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments thereof; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.
Hereinafter, embodiments of the inventive concept will be described as follows with reference to the accompanying drawings.
The inventive concept may, however, be illustrated in many different forms and should not be construed as limited to the specific embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Throughout the specification, it will be understood that when an element such as a layer, region or wafer (substrate) is referred to as being "on," "connected to" or "bonded to" another element, it can be directly on, connected to or bonded to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on" another element,
When "directly connected to" or "directly coupled to" another element, there may be no other element or layer intervening therebetween. Like numbers refer to like elements throughout. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be apparent that, although the terms "first," "second," "third," etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience in description, spatially relative terms (e.g., "above …," "above …," "below …," and "below …," etc.) may be used herein to describe one element's relationship to one or more other elements as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other elements or features would then be oriented "below" or "beneath" the other elements or features. Thus, the term "above …" can encompass both an orientation of "above …" and "below …" depending on the particular orientation of the device in the drawings. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the inventive concept. As used herein, the singular is intended to include the plural unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or combinations, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or combinations.
Hereinafter, embodiments of the inventive concept will be described with reference to schematic diagrams illustrating embodiments of the inventive concept. In the drawings, for example, an ideal shape of the assembly is shown. However, due to manufacturing techniques and/or tolerances, the components may be manufactured with modified shapes relative to those shown. Accordingly, embodiments of the inventive concept should not be construed as limited to the particular shapes of parts illustrated herein but are to be more generally construed to include deviations in shapes that result from manufacturing processes and from non-ideal factors. The inventive concept may also be comprised of one or a combination of the various embodiments shown and/or described herein.
The contents of the inventive concept described below may have various configurations. Only illustrative configurations have been shown and described herein, the inventive concept is not so limited and should be construed to extend to all suitable configurations.
The first embodiment.
Please refer to fig. 1.
A projection system with intelligent heat dissipation function is characterized in that one projection system with intelligent heat dissipation function comprises an intelligent adjusting base, a closed metal shell and a flexible connecting piece; the intelligent adjusting base is a first cuboid, the height of the intelligent adjusting base is smaller than the length and the width of the intelligent adjusting base, the closed metal shell is a second cuboid, the height of the closed metal shell is larger than the length or the width of the closed metal shell, and the flexible connecting piece is a flexible strip member; the intelligent adjusting base is located at the lowest position in the projection system, the closed metal shell is directly connected with the intelligent adjusting base and located on the intelligent adjusting base, and the first cuboid and the second cuboid form a third cuboid; one end of the flexible strip member is detachably connected with the upper end of the left side face of the metal shell, and the other end of the flexible strip member is detachably connected with the upper end of the right side face of the metal shell.
The upper end of the front side surface of the metal shell is provided with a camera and a projection lens; a first through hole with a first size in diameter and penetrating through the left side face is distributed on the left side face of the metal shell; a second through hole which has the first size and penetrates through the right side face is distributed on the right side face of the metal shell; the upper side and the lower side of the metal shell are metal flat plates; the rear side face upper end of the metal shell is provided with a third through hole with a hole diameter of a second size and penetrating through the rear side face, and the rear side face lower end of the metal shell is provided with a fourth through hole with a hole diameter of a third size and penetrating through the rear side face and a fifth through hole with a hole diameter of a fourth size and penetrating through the rear side face.
The first through hole and the second through hole are used for passing audio.
And the third through hole, the fourth through hole and the fourth-fifth through hole are used for heat dissipation.
The first through hole and the second through hole are circular.
The third through hole, the fourth through hole and the fourth through hole are oval.
The diameter of the circle is smaller than the minor radius of the ellipse.
The long radius and the short radius of the third through hole are respectively larger than the long radius and the short radius of the fourth through hole; the long radius and the short radius of the fourth through hole are respectively larger than the long radius and the short radius of the fifth through hole.
The position and the form of the through hole which are reasonable and have the best heat dissipation effect are designed aiming at the position of the component inside the metal shell, and the air heat dissipation effect is ensured.
A power interface is arranged at the center of the lower side surface of the metal shell; the metal shell is internally provided with an MCU and a battery; a display screen and a voice prompter are arranged in the middle of the front side surface of the metal shell; the MCU detects the residual electric quantity level of the battery in real time and transmits the detected residual electric quantity to the display screen in a percentage mode, and the display screen displays the residual electric quantity percentage of the battery in real time; the MCU judges the difference between the real-time detected residual electric quantity level and a preset electric quantity threshold value based on the real-time detected residual electric quantity level, if the difference is smaller than 0, the MCU outputs an alarm instruction to the voice prompter, if the difference is larger than 0, the MCU sets next judgment starting time based on the size of the difference, when the difference is larger, the MCU sets larger next judgment starting time, when the difference is smaller, the MCU sets smaller next judgment starting time, when the timing number of a timing part in the MCU reaches the next judgment starting time, the MCU judges the difference between the real-time detected residual electric quantity level and the preset electric quantity threshold value again, and the cycle is repeated until the difference is smaller than 0; and the voice prompter outputs voice information capable of representing low electric quantity after receiving the alarm instruction so as to remind a user to charge the projection system through the power interface.
The designed starting time can be judged next time, the power consumption of the MCU is greatly reduced, the MCU is frequently judged only when the electric quantity is about to be exhausted, and the continuity of the electric quantity is ensured.
And a power conversion circuit is also arranged in the metal shell. The input end of the power conversion circuit is directly connected with the power interface, the output end of the power conversion circuit is directly connected with the battery, and the power conversion circuit is used for converting single-phase power grid alternating current power received from the power interface into direct current power which can supply power for the battery and meets the safety protection level of the projection system.
Please refer to fig. 2.
The power conversion circuit comprises a first alternating current input end, a second alternating current input end, capacitors C1, C2, C3 and C4, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11 and R12, mosfet switching tubes S1 and S2, diodes D1, D2, D3, D4 and D5 and a transformer T; the transformer T comprises a primary side L1 of the transformer and a secondary side L2 of the transformer; one end of the primary side L1 of the transformer is directly connected with the first alternating current input end, and the other end of the primary side L1 of the transformer is directly connected with the second alternating current input end; one end of the secondary side L2 of the transformer is directly connected to the anode of the diode D1, the other end of the secondary side L2 of the transformer is directly connected to one end of the resistor R6, and the other end of the resistor R6 is directly connected to the source of the mosfet switch tube S2; the anode of the diode D1 is also directly connected with one end of the resistor R1, the cathode of the diode D1 is directly connected with one end of the capacitor C1, and the other end of the capacitor C1 is directly connected with the other end of the resistor R1; one end of the resistor R2 is directly connected with the cathode of the diode D1, the other end of the resistor R2 is directly connected with one end of the resistor R11, and the other end of the resistor R11 is directly connected with one end of the resistor R6; one end of the resistor R3 is directly connected with the cathode of the diode D1, the other end of the resistor R3 is directly connected with the anode of the diode D2, and the cathode of the diode D2 is directly connected with the drain of the mosfet switch tube S1; one end of the capacitor C2 is directly connected with the other end of the resistor R2, and the other end of the capacitor C2 is directly connected with the drain electrode of the mosfet switch tube S1; the base of the mosfet switch tube S1 is directly connected to one end of the capacitor C2, and the source of the mosfet switch tube S1 is directly connected to the other end of the resistor R11; one end of the resistor R4 is directly connected to the cathode of the diode D1, the other end of the resistor R4 is directly connected to one end of the capacitor C3, and the other end of the capacitor C3 is directly connected to the base of the mosfet switch tube S2; one end of the resistor R7 is directly connected with the base of the mosfet switch tube S1, the other end of the resistor R7 is directly connected with the cathode of the diode D3, and the anode of the diode D3 is directly connected with the base of the mosfet switch tube S2; one end of the resistor R8 is directly connected with the cathode of the diode D1, and the other end of the resistor R8 is directly connected with the base electrode of the mosfet switch tube S2; one end of the resistor R12 is directly connected with the source electrode of the mosfet switch tube S1, and the other end of the resistor R12 is directly connected with the base electrode of the mosfet switch tube S2; one end of the resistor R9 is directly connected with the cathode of the diode D1, and the other end of the resistor R9 is directly connected with the cathode of the diode D4; the anode of the diode D4 is directly connected to the cathode of the diode D1, the cathode of the diode D4 is also directly connected to one end of the resistor R10, and the other end of the resistor R10 is directly connected to the drain of the mosfet switch tube S2; the anode of the diode D5 is directly connected to the cathode of the diode D1, the cathode of the diode D5 is directly connected to one end of the resistor R5, and the other end of the resistor R5 is directly connected to the source of the mosfet switch tube S2; one end of the capacitor C4 is directly connected with the anode of the diode D5 and is used as a first anode direct current output end of the power conversion circuit; the other end of the capacitor C4 is directly connected to the source of the mosfet switch tube S2, and serves as a first negative dc output end of the power conversion circuit; the first positive direct current output end is connected with the positive pole of the battery, and the first negative direct current output end is connected with the negative pole of the battery.
The power conversion circuit needs to convert single-phase alternating current power into direct current power with high quality and high efficiency, the circuit designed by the invention not only greatly improves the transmission efficiency of the power, but also can meet the requirements of the portable projector on the volume, the voltage protection grade and the like.
An aluminum radiating fin and an intelligent fan are further arranged in the metal shell; the aluminum radiating fins are fixed on the upper side or the lower side or the upper side and the lower side of the interior of the metal shell; the intelligent fan is fixed on the rear side surface inside the metal shell; the intelligent fan is in communication connection with the MCU and automatically and intelligently adjusts the running speed of the intelligent fan based on the control of the MCU.
After the projection system starts to work, the MCU outputs a first-stage instruction to the intelligent fan, and the intelligent fan runs at a first preset low rotating speed; the MCU steplessly adjusts the rotating speed of the intelligent fan in real time based on the volume of the audio file played by the projection system in real time, so that when the volume is large, the rotating speed is large, when the volume is small, the rotating speed is small, and the noise which is enough to influence the user experience and is brought by the operation of the intelligent fan is avoided while the cooling is guaranteed.
When the intelligent fan runs at a first preset low rotating speed, the noise generated by the intelligent fan should not exceed 25 decibels.
The MCU is pre-stored with a mapping relation table between the rotating speed of the intelligent fan and the noise generated by the intelligent fan; when the projection system plays an audio file in real time, the MCU acquires the volume of the audio file in real time and calculates the maximum noise which can be generated by the intelligent fan based on the volume; and the MCU obtains the maximum rotating speed of the intelligent fan based on the maximum noise and the mapping relation table.
The maximum noise which can be generated by the intelligent fan can be obtained by multiplying the volume of the audio file by a predetermined coefficient which is less than 1, wherein the predetermined coefficient is set so that the noise generated by the intelligent fan is covered by the volume of the audio file and the influence of the noise on the volume cannot be perceived by human ears.
A temperature sensor is further arranged in the metal shell and is arranged near the projection lens; after the projection system starts to work, the temperature sensor detects the temperature in real time and transmits the temperature to the MCU in real time; the MCU judges whether the temperature is greater than a temperature threshold value, if so, the intelligent fan is controlled to operate at the maximum rotating speed, otherwise, the intelligent fan is controlled to operate at a second variable rotating speed lower than the maximum rotating speed, and when the temperature is closer to the temperature threshold value, the second variable rotating speed is closer to the maximum rotating speed; the second variable rotation speed is greater than the first preset low rotation speed.
Example two.
The intelligent adjusting base comprises a base body, a first lifting mechanism, a second lifting mechanism, a first intelligent motor, a second intelligent motor and an energy storage element; one end of the first lifting mechanism is fixedly connected to one side of the upper surface of the base body, and the other end of the first lifting mechanism is fixedly connected to one side of the lower side surface of the metal shell; one end of the second lifting mechanism is fixedly connected to the other side edge of the upper surface of the base body, and the other end of the second lifting mechanism is fixedly connected to the other side edge of the lower side surface of the metal shell; one side of the upper surface and the other side of the upper surface are oppositely arranged, and one side of the lower side surface and the other side of the lower side surface are oppositely arranged; the first intelligent motor, the second intelligent motor and the energy storage element are arranged in the base body; the first intelligent motor is connected with the first lifting mechanism and used for providing lifting power for the first intelligent motor, the second intelligent motor is connected with the second lifting mechanism and used for providing lifting power for the second intelligent motor, and the energy storage element is directly connected with the first intelligent motor and the second intelligent motor respectively and used for providing power supply for the first intelligent motor and the second intelligent motor.
When the projection system is shut down each time, the MCU sends a reply instruction to the first intelligent motor and the second intelligent motor; first intelligent motor, second intelligent motor are receiving control respectively behind the reply instruction first, second elevating system reconversion for the two is held again between base body and the metal casing, make first cuboid and second cuboid direct contact.
A first infrared ranging module is further arranged at the upper end of the front side face of the metal shell and is close to the projection lens; still be provided with the infrared range finding module of second on the last side of metal casing, the infrared range finding module of second is close to projection lens sets up.
After the projection system is started, the first infrared ranging module and the second infrared ranging module start to work before the projection system starts to work to output audio or video or audio and video; the user lifts the projection system and lifts the projection system to be close to human eyes, the posture is kept for a preset time, the first infrared ranging module and the second infrared ranging module respectively measure a first distance d1 and a second distance d2, and the first distance and the second distance are transmitted to the MCU; after the user places the projection system at a certain position, the first infrared ranging module and the second infrared ranging module respectively measure a third distance d3 and a fourth distance d4, and transmit the third distance and the fourth distance to the MCU; the MCU judges
Whether or not, wherein thetaupAt a predetermined upward viewing angle, thetadownThe preset elevation angle or the preset overlook angle is the maximum elevation angle or overlook angle which enables a user to feel comfortable, and if the maximum elevation angle or the overlook angle is met, the MCU calculates the radiation angle of the projection lens
The radiation angle is the included angle between the highest light ray emitted upwards by the projection lens and the horizontal plane, and controls the projection lens to emit lightThe projection lens is adjusted according to the radiation angle; if not, the MCU judges whether d4 is larger than d4
If yes, the MCU outputs a rising instruction with specific parameters to the first intelligent motor and the second intelligent motor, so that the first lifting mechanism and the second lifting mechanism rise simultaneously
The specific parameter can indicate the distance to be raised, and then the MCU calculates the radiation angle of the projection lens
The radiation angle is an included angle between the highest light ray emitted upwards by the projection lens and the horizontal plane, and the projection lens is controlled to be adjusted according to the radiation angle; if the MCU judges that d4 is less than
The MCU outputs a reminding message to the voice prompter, and the voice prompter outputs voice to remind a user to place the projection system at a low position.
The application of the ranging module enables the projector to have the self-adaptive adjusting function, does not need users to carry out clumsy adjustment based on self experience, and is convenient and efficient.
The projection system with the intelligent heat dissipation function disclosed by the invention adopts the metal shell, the aluminum heat dissipation sheet, the through holes with various specifications and the fan to realize good heat dissipation performance; the rotating speed of the fan is adjusted based on the volume, so that the using effect of a user cannot be influenced while heat is dissipated, and meanwhile, the designed temperature sensor is matched with the rotating speed of the fan in a coordinated mode, so that unnecessary heat dissipation is avoided; the arranged alternating current single-phase conversion circuit enables the conversion efficiency of the power to be extremely high; the lifting base is arranged, so that the height of the projection system can be adjusted in a self-adaptive manner; the distance measurement module that cooperation MCU used has realized the perfect measurement of the most comfortable field of vision scope to through control elevating system, realize that projection system can present the video that accords with user's visual angle completely.
Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. It is therefore intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, that are intended to define the spirit and scope of this invention. The above examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.
Claims (5)
1. A projection system with intelligent heat dissipation function is characterized in that one projection system with intelligent heat dissipation function comprises an intelligent adjusting base, a closed metal shell and a flexible connecting piece; the intelligent adjusting base is a first cuboid, the height of the intelligent adjusting base is smaller than the length and the width of the intelligent adjusting base, the closed metal shell is a second cuboid, the height of the closed metal shell is larger than the length or the width of the closed metal shell, and the flexible connecting piece is a flexible strip member; the intelligent adjusting base is located at the lowest position in the projection system, the closed metal shell is directly connected with the intelligent adjusting base and located on the intelligent adjusting base, and the first cuboid and the second cuboid form a third cuboid; one end of the flexible strip member is detachably connected with the upper end of the left side surface of the metal shell, and the other end of the flexible strip member is detachably connected with the upper end of the right side surface of the metal shell; the upper end of the front side surface of the metal shell is provided with a camera and a projection lens; a first through hole with a first size in diameter and penetrating through the left side face is distributed on the left side face of the metal shell; a second through hole which has the first size and penetrates through the right side face is distributed on the right side face of the metal shell; the upper side and the lower side of the metal shell are metal flat plates; the upper end of the rear side face of the metal shell is provided with third through holes which have the second size and penetrate through the rear side face, and the lower end of the rear side face of the metal shell is provided with fourth through holes which are staggered and have the third size and penetrate through the rear side face and fifth through holes which have the fourth size and penetrate through the rear side face; the first through hole and the second through hole are used for passing audio; the third through hole, the fourth through hole and the fourth-fifth through hole are used for heat dissipation; the first through hole and the second through hole are circular; the third through hole, the fourth through hole and the fourth through hole are oval; the diameter of the circle is smaller than the short radius of the ellipse; the long radius and the short radius of the third through hole are respectively larger than the long radius and the short radius of the fourth through hole; the long radius and the short radius of the fourth through hole are respectively larger than the long radius and the short radius of the fifth through hole; a power interface is arranged at the center of the lower side surface of the metal shell; the metal shell is internally provided with an MCU and a battery; a display screen and a voice prompter are arranged in the middle of the front side surface of the metal shell; the MCU detects the residual electric quantity level of the battery in real time and transmits the detected residual electric quantity to the display screen in a percentage mode, and the display screen displays the residual electric quantity percentage of the battery in real time; the MCU judges the difference between the real-time detected residual electric quantity level and a preset electric quantity threshold value based on the real-time detected residual electric quantity level, if the difference is smaller than 0, the MCU outputs an alarm instruction to the voice prompter, if the difference is larger than 0, the MCU sets next judgment starting time based on the size of the difference, when the difference is larger, the MCU sets larger next judgment starting time, when the difference is smaller, the MCU sets smaller next judgment starting time, when the timing number of a timing part in the MCU reaches the next judgment starting time, the MCU judges the difference between the real-time detected residual electric quantity level and the preset electric quantity threshold value again, and the cycle is repeated until the difference is smaller than 0; and the voice prompter outputs voice information capable of representing low electric quantity after receiving the alarm instruction so as to remind a user to charge the projection system through the power interface.
2. The projection system with intelligent heat dissipation function as recited in claim 1, wherein a power conversion circuit is further disposed in the metal shell; the input end of the power conversion circuit is directly connected with the power interface, the output end of the power conversion circuit is directly connected with the battery, and the power conversion circuit is used for converting single-phase power grid alternating current power received from the power interface into direct current power which can supply power for the battery and meets the safety protection level of the projection system.
3. The projection system with the intelligent heat dissipation function as recited in claim 2, wherein an aluminum heat sink and an intelligent fan are further arranged in the metal shell; the aluminum radiating fins are fixed on the upper side or the lower side or the upper side and the lower side of the interior of the metal shell; the intelligent fan is fixed on the rear side surface inside the metal shell; the intelligent fan is in communication connection with the MCU and automatically and intelligently adjusts the running speed of the intelligent fan based on the control of the MCU.
4. The projection system with the intelligent heat dissipation function as claimed in claim 3, wherein after the projection system starts to work, the MCU outputs a first-stage instruction to the intelligent fan, and the intelligent fan operates at a first preset low rotation speed; the MCU steplessly adjusts the rotating speed of the intelligent fan in real time based on the volume of the audio file played by the projection system in real time, so that the rotating speed is higher when the volume is higher, and the rotating speed is lower when the volume is lower, so that the noise which is enough to influence the user experience and is brought by the operation of the intelligent fan is avoided while the cooling is ensured;
when the intelligent fan runs at a first preset low rotating speed, the noise generated by the intelligent fan is not more than 25 decibels;
the MCU is pre-stored with a mapping relation table between the rotating speed of the intelligent fan and the noise generated by the intelligent fan; when the projection system plays an audio file in real time, the MCU acquires the volume of the audio file in real time and calculates the maximum noise which can be generated by the intelligent fan based on the volume; the MCU obtains the maximum rotating speed of the intelligent fan based on the maximum noise and the mapping relation table;
the maximum noise which can be generated by the intelligent fan can be obtained by multiplying the volume of the audio file by a predetermined coefficient which is less than 1, wherein the predetermined coefficient is set so that the noise generated by the intelligent fan is covered by the volume of the audio file and the influence of the noise on the volume cannot be perceived by human ears.
5. The projection system with the intelligent heat dissipation function as recited in claim 4, wherein a temperature sensor is further arranged in the metal shell, and the temperature sensor is arranged near the projection lens; after the projection system starts to work, the temperature sensor detects the temperature in real time and transmits the temperature to the MCU in real time; the MCU judges whether the temperature is greater than a temperature threshold value, if so, the intelligent fan is controlled to operate at the maximum rotating speed, otherwise, the intelligent fan is controlled to operate at a second variable rotating speed lower than the maximum rotating speed, and when the temperature is closer to the temperature threshold value, the second variable rotating speed is closer to the maximum rotating speed; the second variable rotation speed is greater than the first preset low rotation speed.
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| CN107135441A (en) * | 2017-07-03 | 2017-09-05 | 深圳市寅沃技术有限公司 | A kind of smart motion bluetooth earphone |
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| CN201130294Y (en) * | 2007-12-20 | 2008-10-08 | 中国电子科技集团公司第二十八研究所 | Lifting/lowering device for projector |
| CN203723645U (en) * | 2014-01-27 | 2014-07-23 | 华北电力大学（保定） | Wheeled movable platform robot |
| CN104951060A (en) * | 2014-03-28 | 2015-09-30 | 联想(北京)有限公司 | Information processing method, control equipment and electronic equipment |
| CN104007392B (en) * | 2014-05-23 | 2017-01-11 | 无锡英诺浦斯微电子有限公司 | Battery electric quantity detecting and displaying method |
| CN204852845U (en) * | 2015-08-07 | 2015-12-09 | 海南赛航光电科技有限公司 | Projecting apparatus with scalable folding support |
| CN107394835A (en) * | 2017-07-20 | 2017-11-24 | 北京伊电园网络科技有限公司 | A kind of method of data transfer, cell apparatus and micromonitor system |
| CN107249085B (en) * | 2017-07-28 | 2020-11-27 | 泾县谷声信息科技有限公司 | Mobile terminal electric quantity display method, mobile terminal and computer readable storage medium |
| CN207571453U (en) * | 2017-12-21 | 2018-07-03 | 长安大学 | A kind of Multifunctional portable projector |
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| CN107135441A (en) * | 2017-07-03 | 2017-09-05 | 深圳市寅沃技术有限公司 | A kind of smart motion bluetooth earphone |
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