CN109375457B - Camera module with automatic heating function - Google Patents
Camera module with automatic heating function Download PDFInfo
- Publication number
- CN109375457B CN109375457B CN201811517812.8A CN201811517812A CN109375457B CN 109375457 B CN109375457 B CN 109375457B CN 201811517812 A CN201811517812 A CN 201811517812A CN 109375457 B CN109375457 B CN 109375457B
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- chip
- heating device
- heat dissipation
- lens
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 63
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 230000017525 heat dissipation Effects 0.000 claims description 25
- 239000003990 capacitor Substances 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 12
- 238000010257 thawing Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 2
- ZGHQUYZPMWMLBM-UHFFFAOYSA-N 1,2-dichloro-4-phenylbenzene Chemical compound C1=C(Cl)C(Cl)=CC=C1C1=CC=CC=C1 ZGHQUYZPMWMLBM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/55—Details of cameras or camera bodies; Accessories therefor with provision for heating or cooling, e.g. in aircraft
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Studio Devices (AREA)
Abstract
The embodiment of the invention discloses an image pickup module with an automatic heating function, which at least comprises a lens and a heating device arranged on the lens, and further comprises: the temperature detection circuit is electrically connected with the input end of the single-chip microcomputer chip and sends detected temperature signals to the single-chip microcomputer chip, the heating device is electrically connected with the output end of the single-chip microcomputer chip, and the single-chip microcomputer chip controls the starting/stopping of the heating device according to the received temperature signals. According to the embodiment of the invention, the heating device of the camera module can control the start/stop of the heating sheet according to the detected temperature signal, so that the camera module can realize the effects of automatic defrosting and defogging in cold or humid weather conditions or environments. The method is suitable for various fields such as vehicle-mounted lenses and outdoor monitoring.
Description
Technical field:
the invention relates to a camera module, in particular to a camera module with an automatic heating function.
The background technology is as follows:
The existing camera module generally has no automatic heating function, and cannot realize the effects of automatically removing frost and demisting in cold or humid weather conditions or environments.
The invention comprises the following steps:
In order to solve the problem that the existing camera module does not have an automatic heating function and cannot realize an automatic defrosting and demisting effect in cold or humid weather conditions or environments, the embodiment of the invention provides a camera module with an automatic heating function.
Take self-heating function's module of making a video recording, it includes at least camera lens and locates the heating device on the camera lens, still includes: the temperature detection circuit is electrically connected with the input end of the single-chip microcomputer chip and sends detected temperature signals to the single-chip microcomputer chip, the heating device is electrically connected with the output end of the single-chip microcomputer chip, and the single-chip microcomputer chip controls the starting/stopping of the heating device according to the received temperature signals.
According to the embodiment of the invention, the heating device of the camera module can control the start/stop of the heating sheet according to the detected temperature signal, so that the camera module can realize the effects of automatic defrosting and defogging in cold or humid weather conditions or environments. The method is suitable for various fields such as vehicle-mounted lenses and outdoor monitoring.
Description of the drawings:
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a driving circuit structure of an image capturing module according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a connection circuit between a singlechip chip and a temperature detection circuit of an image pickup module according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a voltage conversion circuit of an image capturing module according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of an image capturing module according to an embodiment of the present invention;
FIG. 5 is a section A-A of FIG. 4;
FIG. 6 is an exploded view of a camera module according to an embodiment of the present invention;
FIG. 7 is a second schematic explosion diagram of the camera module according to the embodiment of the invention;
fig. 8 is a schematic structural diagram of a heating device according to an embodiment of the present invention.
The specific embodiment is as follows:
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
When embodiments of the present invention refer to the ordinal terms "first," "second," etc., it is to be understood that they are merely used for distinguishing between them unless the order of their presentation is indeed dependent on the context.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 2 and 5, an image capturing module with an automatic heating function at least includes a lens 1 and a heating device 2 disposed on the lens, and further includes: the temperature detection circuit is electrically connected with the input end of the single-chip microcomputer chip U10 and sends a detected temperature signal to the single-chip microcomputer chip U10, the heating device 2 is electrically connected with the output end of the single-chip microcomputer chip U10, and the single-chip microcomputer chip U10 controls the starting/stopping of the heating device 2 according to the received temperature signal.
According to the embodiment of the invention, the heating device of the camera module can control the start/stop of the heating sheet according to the detected temperature signal, so that the camera module can realize the effects of automatic defrosting and defogging in cold or humid weather conditions or environments. The method is suitable for various fields such as vehicle-mounted lenses and outdoor monitoring.
In the present embodiment, the heating device 2 is disposed between the first lens of the lens 1 and the lens barrel, and the heating surface of the heating device 2 acts on the image surface side of the first lens. The heating device directly acts on the first lens, and can rapidly remove frost and defogging.
Further, as a preferred embodiment of the present invention, but not limited to, as shown in fig. 8, the temperature detection circuit includes at least a temperature sensor 21, the heating device 2 is a heat generating plate, and the temperature sensor 21 is provided on the heat generating plate and is closely attached to the lens 1. The structure is simple, the temperature of the lens can be obtained through the temperature sensor, if the temperature is lower than a preset value, the situation that frosting or fogging occurs on the lens under the weather conditions or environments such as cold, or damp is indicated, the singlechip chip U10 controls the heating sheet to start, and the effects of defrosting and demisting are achieved; meanwhile, the temperature sensor is arranged on the heating sheet, the current temperature of the heating sheet can be monitored in real time, if the current temperature of the heating sheet is too high, the singlechip chip U10 controls the heating sheet to stop working or adjusts PWM control signals, and the heating sheet can be automatically turned off after frosting or fogging is eliminated, so that the high temperature condition inside the lens is avoided, and the performance of the lens is influenced.
Still further, as a preferred embodiment of the present invention, but not limited to, as shown in fig. 8, the heat generating sheet has an annular main plate mounted on the lens and provided with a heat generating element, and the temperature sensor 21 is provided on the outer surface of the annular main plate. The temperature of the lens can be obtained, the current temperature of the heating sheet can be monitored in real time, and an accurate temperature signal can be provided for the singlechip chip U10 so as to control the working state of the heating sheet.
Further, as a preferred embodiment of the present invention, as shown in fig. 1, a driving circuit is disposed between the singlechip chip U10 and the heating device 2, wherein the driving circuit comprises transistors Q1A and Q1B, a voltage regulator D3, a power transistor U8, a resistor R28, a resistor R29, and capacitors C49, C50, C51 and C52; the triode Q1B is a PNP tube, the emitter of the triode Q1B is connected with a +12V direct current source, the collector of the triode Q1B is grounded through a resistor R29, and the base of the triode Q1B is connected with the collector of the triode Q1A; the emitter of the triode Q1A is grounded, and the substrate of the triode Q1A is connected to the singlechip chip U10 to acquire PWM control signals; the grid electrode of the power transistor U8 is connected with the collector electrode of the triode Q1B, the source electrode of the power transistor U8 is connected with the emitter electrode of the triode Q1B, a voltage stabilizing tube D3 and a resistor R28 are arranged in parallel between the grid electrode and the source electrode, and the drain electrode of the power transistor U8 is connected to the heating device and connected with the capacitors C49, C50, C51 and C52.
Further, as shown in fig. 1, as a preferred embodiment of the present invention, but not limiting, a fuse F1 is provided between the transistor Q1B and the +12v dc source.
Still further, as a preferred embodiment of the present invention, but not limited to, as shown in fig. 2, the temperature detection circuit further includes an RC network disposed between the temperature sensor and the input end of the single chip microcomputer U10, where the RC network includes a resistor R31 and a capacitor C53 connected in parallel between the output pin of the temperature sensor and the ground. The output fluctuation of the temperature sensor is buffered, and the influence of external interference on the output electric signal of the temperature sensor is avoided.
Further, as a preferred embodiment of the present invention, as shown in fig. 3, but not limited thereto, the present invention further includes a voltage conversion circuit for reducing an input supply voltage, the voltage conversion circuit includes a voltage conversion chip U12 (model LM53601MQDSXRQ or LM53601 AQDSXRQ), a voltage stabilizing tube D5, an inductor L7, a resistor R147, a resistor R148, a capacitor C59, C60, C61, and C62, the voltage conversion chip U12 has an input terminal VIN, an output terminal SW, and a feedback terminal FB, the input terminal VIN is connected to a +12v dc source and is provided in parallel with the capacitors C61, C62, and the voltage stabilizing tube D5, the output terminal SW generates a +5v voltage output via the inductor L7, the capacitor C59 is provided between the output terminal SW and the feedback terminal FB, the resistors R147 and R148 are serially connected between the inductor L7 and the ground, the capacitor C60 is connected in parallel with the resistors R147 and R148, and the connection point of the resistors R147 and R148 is connected to the feedback terminal FB.
Further, as a preferred embodiment of the present invention, not by way of limitation, the temperature sensor 21 is an NTC thermistor.
Still further, as a preferred embodiment of the present invention, and not by way of limitation, as shown in fig. 4 to 7, the present invention further includes:
a front case 31 provided with a photographing viewfinder 30 facing the lens 1;
The base body 32 is matched with the front shell 31, is provided with a mounting seat, forms a first heat dissipation cavity 311 with the front shell 31, the lens 1 is arranged in the mounting seat and is positioned in the first heat dissipation cavity 311, and the front end of the lens 1 is propped against the shooting view finding window 30 of the front shell 31;
the back shell 33 is matched with the base 32, a second heat dissipation cavity 312 is formed between the back shell and the base 32, and a PCB 12 is connected with the base 32 and is positioned in the second heat dissipation cavity 312. Simple structure, convenient assembly, small volume and good heat dissipation effect.
Further, as a preferred embodiment of the present invention, but not limited to, as shown in fig. 5, a photosensitive chip 11 is disposed below the substrate 32 at a position corresponding to the rear end of the lens 1. The structure is simple.
Still further, as a preferred embodiment of the present invention, but not limited to, as shown in fig. 5, the single chip microcomputer U10, the temperature detection circuit, the driving circuit, and the voltage conversion circuit are disposed on the PCB board 12, a port electrically connected to the photosensitive chip 11 and a wiring port electrically connected to the heating device 2 are disposed above the PCB board 12, and an image pickup signal transmission interface 121 and a power interface 122 are disposed below the PCB board. The structure is simple.
Further, as a preferred embodiment of the present invention, as shown in fig. 6 and 7, the rear case 33 is provided with an opening 332 corresponding to the power source interface 122 and an opening 331 corresponding to the image pickup signal transmission interface 121. The structure is simple.
Further, as shown in fig. 5 and 6, a heat dissipation convection hole 321 is formed on the base 32 beside the mounting seat, and the heat dissipation convection hole 321 is communicated with the first heat dissipation cavity 311 and the second heat dissipation cavity 312, and an electrical connection wire and a connection terminal on the heating device 2 are electrically connected with the connection terminal on the PCB board 12 through the heat dissipation convection hole 321. Simple structure and good heat dissipation effect.
Further, as a preferred embodiment of the present invention, as shown in fig. 5 and 6, the area S1 of the heat dissipation convection hole and the substrate area S2 satisfy: s1: s2=1: 2 to 4. The heat dissipation effect is good.
Further, as a preferred embodiment of the present invention, but not limited to, as shown in fig. 5 to 7, a first positioning protrusion is provided at the lower edge of the front case 31, a first positioning groove is provided on the upper surface of the base 32, the first positioning protrusion is matched with the first positioning groove, and a first sealing ring 301 is provided therebetween; and/or the upper edge of the rear shell 33 is provided with a second positioning protrusion, the lower surface of the base body 32 is provided with a second positioning groove, the second positioning protrusion is matched with the second positioning groove, and a second sealing ring 302 is arranged between the second positioning protrusion and the second positioning groove. The waterproof effect is good.
Further, as a preferred embodiment of the present invention, as shown in fig. 5 to 7, a third seal ring 303 is provided between the front end of the lens 1 and the photographing window 30 of the front case 31. The waterproof effect is good.
Still further, as a preferred embodiment of the present invention, but not limited to, as shown in fig. 4 to 7, the front case is provided with heat dissipation fins extending in the longitudinal direction on the peripheral side surface, and the rear case is also provided with heat dissipation fins extending in the longitudinal direction on the peripheral side surface. The heat dissipation effect is good.
The specific start-stop control principle of the embodiment of the invention is that an external temperature signal is obtained through a temperature sensor 21 connected with a J3 interface in fig. 2, then the electric output of the J3 interface is read through a singlechip chip U10 and converted into a voltage value through A/D conversion, the current temperature T value is calculated according to the voltage value and the attribute of the temperature sensor 21, if T is within a preset range, the singlechip chip U10 does not operate a heating device 2 connected with a J4 interface in fig. 1 or turns off a PWM pin thereof, so that the heating device 2 stops working, then the value of the temperature sensor 21 is continuously obtained, and the temperature T of the next second is judged. If T is lower than the lower limit value of the preset range, the singlechip chip U10 starts the PWM pin, so that the heating device 2 works or the working state of the PWM pin is saved. If T is higher than the upper limit value of the preset range, the singlechip chip U10 closes the PWM pin to stop the heating device 2, then continues to read the value of the temperature sensor 21, judges the T of the next second, and circulates in this way.
The foregoing description of one or more embodiments provided in connection with the specific disclosure is not intended to limit the practice of the invention to such description. The method, structure, etc. similar to or identical to those of the present invention, or some technical deductions or substitutions are made on the premise of the inventive concept, should be regarded as the protection scope of the present invention.
Claims (6)
1. Take self-heating function's module of making a video recording, it includes at least camera lens and locates the heating device on the camera lens, its characterized in that still includes: the temperature detection circuit is electrically connected with the input end of the single-chip microcomputer chip and sends a detected temperature signal to the single-chip microcomputer chip, the heating device is electrically connected with the output end of the single-chip microcomputer chip, and the single-chip microcomputer chip controls the starting/stopping of the heating device according to the received temperature signal;
The temperature detection circuit at least comprises a temperature sensor, the heating device is a heating sheet, and the temperature sensor is arranged on the heating sheet and is clung to the lens;
A driving circuit is arranged between the singlechip chip and the heating device and comprises triodes Q1A and Q1B, a voltage stabilizing tube D3, a power transistor U8, a resistor R28, a resistor R29, and capacitors C49, C50, C51 and C52; the triode Q1B is a PNP tube, the emitter of the triode Q1B is connected with a +12V direct current source, the collector of the triode Q1B is grounded through a resistor R29, and the base of the triode Q1B is connected with the collector of the triode Q1A; the emitter of the triode Q1A is grounded, and the substrate of the triode Q1A is connected to the singlechip chip to acquire a PWM control signal; the grid electrode of the power transistor U8 is connected with the collector electrode of the triode Q1B, the source electrode of the power transistor U8 is connected with the emitter electrode of the triode Q1B, a voltage stabilizing tube D3 and a resistor R28 are arranged in parallel between the grid electrode and the source electrode, and the drain electrode of the power transistor U8 is connected to the heating device and is connected with the capacitors C49, C50, C51 and C52;
The temperature detection circuit also comprises an RC network arranged between the temperature sensor and the input end of the singlechip chip, wherein the RC network comprises a resistor R31 and a capacitor C53 which are connected in parallel between the output pin of the temperature sensor and the ground end;
The voltage conversion circuit comprises a voltage conversion chip, a voltage stabilizing tube D5, an inductance coil L7, a resistor R147, a resistor R148, capacitors C59, C60, C61 and C62, wherein the voltage conversion chip is provided with an input end VIN, an output end SW and a feedback end FB, the input end VIN is connected with a +12V direct current source and is provided with the capacitors C61, C62 and the voltage stabilizing tube D5 in parallel, the output end SW of the voltage conversion circuit generates +5V voltage output through the inductance coil L7, a capacitor C59 is arranged between the output end SW and the feedback end FB, the resistors R147 and R148 are connected between the inductance coil L7 and the ground in series, the capacitor C60 is connected with the resistors R147 and R148 in parallel, and a connecting point of the resistors R147 and R148 is connected with the feedback end FB.
2. The camera module with automatic heating function according to claim 1, wherein the heating plate has an annular main plate, the annular main plate is mounted on the lens and provided with a heating element, and the temperature sensor is disposed on the outer surface of the annular main plate.
3. The camera module with an automatic heating function according to any one of claims 1 to 2, further comprising:
A front shell provided with a shooting view finding window opposite to the lens;
The base body is matched with the front shell, a mounting seat is arranged on the base body, a first heat dissipation cavity is formed between the base body and the front shell, the lens is arranged in the mounting seat and positioned in the first heat dissipation cavity, and the front end of the lens is propped against the shooting view finding window of the front shell;
the rear shell is matched with the base body, a second heat dissipation cavity is formed between the rear shell and the base body, and a PCB board is located in the second heat dissipation cavity.
4. The camera module with automatic heating function according to claim 3, wherein the rear case is provided with an opening corresponding to the power interface and an opening corresponding to the camera signal transmission interface.
5. The camera module with automatic heating function according to claim 4, wherein a heat dissipation convection hole is formed on the base body beside the mounting seat, the heat dissipation convection hole is communicated with the first heat dissipation cavity and the second heat dissipation cavity, and an electric connection wire and a wiring terminal on the heating device are electrically connected with the wiring terminal on the PCB board through the heat dissipation convection hole.
6. The camera module with automatic heating function according to claim 5, wherein the lower edge of the front shell is provided with a first positioning protrusion, the upper surface of the base body is provided with a first positioning groove, the first positioning protrusion is matched with the first positioning groove, and a first sealing ring is arranged between the first positioning protrusion and the first positioning groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811517812.8A CN109375457B (en) | 2018-12-12 | 2018-12-12 | Camera module with automatic heating function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811517812.8A CN109375457B (en) | 2018-12-12 | 2018-12-12 | Camera module with automatic heating function |
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| Publication Number | Publication Date |
|---|---|
| CN109375457A CN109375457A (en) | 2019-02-22 |
| CN109375457B true CN109375457B (en) | 2024-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811517812.8A Active CN109375457B (en) | 2018-12-12 | 2018-12-12 | Camera module with automatic heating function |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095921A (en) * | 2019-06-05 | 2019-08-06 | 广东弘景光电科技股份有限公司 | Automatic temperature-sensed heats camera module |
| CN110095922A (en) * | 2019-06-05 | 2019-08-06 | 广东弘景光电科技股份有限公司 | Multiple detection heats camera module automatically |
| CN112839145A (en) * | 2019-11-22 | 2021-05-25 | 余姚舜宇智能光学技术有限公司 | TOF camera module, manufacturing method thereof and electronic equipment |
| CN111399563B (en) * | 2020-03-24 | 2021-10-19 | Oppo广东移动通信有限公司 | User terminal equipment |
| CN111459080B (en) * | 2020-04-30 | 2024-07-23 | 广东弘景光电科技股份有限公司 | Automatic heating control circuit for raindrop detection of camera module |
| CN113259562B (en) * | 2021-05-12 | 2023-04-07 | 杭州华橙软件技术有限公司 | Demisting device and demisting method |
| CN114839829A (en) * | 2022-03-14 | 2022-08-02 | 惠州市德赛西威智能交通技术研究院有限公司 | Method and device for automatically heating and deicing, defrosting and fogging of vehicle-mounted lens |
| CN114721206B (en) * | 2022-03-26 | 2024-08-13 | 上海欧菲智能车联科技有限公司 | Imaging module, lens defogging method, storage medium and vehicle |
| CN117706850A (en) * | 2022-09-02 | 2024-03-15 | 佛吉亚歌乐电子(厦门)有限公司 | Heating system and control method of heating system |
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| CN103297664A (en) * | 2013-06-17 | 2013-09-11 | 安科智慧城市技术（中国）有限公司 | Video camera and low temperature starting device and method thereof |
| CN208192909U (en) * | 2017-06-15 | 2018-12-07 | 苏州工业职业技术学院 | A kind of intelligent electric-heating grill control systems |
| CN107703702A (en) * | 2017-11-20 | 2018-02-16 | 广东弘景光电科技股份有限公司 | Take the camera module of white defrosting function |
| CN208188696U (en) * | 2018-05-16 | 2018-12-04 | 杭州海康威视数字技术股份有限公司 | A kind of video camera |
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| CN206602571U (en) * | 2017-02-23 | 2017-10-31 | 浙江宇视科技有限公司 | A kind of imaging device and parking position video camera |
| CN209149041U (en) * | 2018-12-12 | 2019-07-23 | 广东弘景光电科技股份有限公司 | Camera module with automatic heating function |
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