CN209149043U - Heating device - Google Patents
Heating device Download PDFInfo
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- CN209149043U CN209149043U CN201822089855.2U CN201822089855U CN209149043U CN 209149043 U CN209149043 U CN 209149043U CN 201822089855 U CN201822089855 U CN 201822089855U CN 209149043 U CN209149043 U CN 209149043U
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- heating device
- resistance
- singlechip chip
- fever tablet
- voltage
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Abstract
The utility model embodiment discloses a kind of heating device, it include: singlechip chip, temperature sensing circuit and fever tablet, temperature sensing circuit is electrically connected with the input terminal of singlechip chip, and the temperature signal that will test is sent to singlechip chip, fever tablet is electrically connected with the output end of singlechip chip, singlechip chip according to received temperature signal control fever tablet open/stop.The utility model embodiment, heating device can control opening/stopping for fever tablet according to the temperature signal detected, when being applied to camera module, so that the effect for removing frost, demisting automatically may be implemented in camera module under the weather conditions such as cold or humidity or environment.Suitable for various fields such as on-vehicle lens, outdoor monitorings.
Description
Technical field:
The utility model relates to a kind of heating devices.
Background technique:
Existing heating device does not have automatic heating function generally, when being applied on camera module, so that camera module
Under the weather conditions such as cold or humidity or environment, the effect for going white demisting automatically cannot achieve.
Utility model content:
To overcome existing heating device not have automatic heating function, when being applied on camera module, so that camera shooting mould
Group cannot achieve the problem of going white demisting automatically, the utility model embodiment under the weather conditions such as cold or humidity or environment
Provide a kind of heating device.
A kind of heating device, comprising: singlechip chip, temperature sensing circuit and fever tablet, temperature sensing circuit and list
The input terminal of piece machine core piece is electrically connected, and the temperature signal that will test is sent to singlechip chip, fever tablet and monolithic machine core
The output end of piece is electrically connected, and singlechip chip controls opening/stopping for fever tablet according to the received temperature signal of institute.
The utility model embodiment, heating device can control opening/stopping for fever tablet according to the temperature signal detected,
When applied to camera module so that camera module may be implemented to go automatically under the weather conditions such as cold or humidity or environment frost,
The effect of demisting.Suitable for various fields such as on-vehicle lens, outdoor monitorings.
Detailed description of the invention:
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the heating device of the utility model embodiment or the driving circuit structure schematic diagram of camera module;
Fig. 2 is the heating device of the utility model embodiment or the singlechip chip of camera module and temperature sensing circuit
Connect electrical block diagram;
Fig. 3 is the heating device of the utility model embodiment or the voltage conversion circuit structural schematic diagram of camera module;
Fig. 4 is the structural schematic diagram of the camera module of the utility model embodiment;
Fig. 5 is the A-A cut-away view of Fig. 4;
Fig. 6 is the perspective view of the explosion one of the camera module of the utility model embodiment;
Fig. 7 is the perspective view of the explosion two of the camera module of the utility model embodiment;
Fig. 8 is the structural schematic diagram of the heating device of the utility model embodiment.
Specific embodiment:
The technical issues of in order to keep the utility model solved, technical solution and beneficial effect are more clearly understood, below
In conjunction with accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific implementation described herein
Example is only used to explain the utility model, is not used to limit the utility model.
When the utility model embodiment refers to the ordinal numbers such as " first ", " second ", unless based on context its certain table
Up to the meaning of sequence, it should be understood that only play differentiation and be used.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection;It can be mechanical connection, be also possible to be electrically connected;Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
As shown in Fig. 2, a kind of heating device 2, including singlechip chip U10 (model TM57MA15), temperature detection electricity
Road and fever tablet, the temperature signal that temperature sensing circuit is electrically connected with the input terminal of singlechip chip U10, and will test
It is sent to singlechip chip U10, fever tablet is electrically connected with the output end of singlechip chip U10, and singlechip chip U10 is according to being connect
The temperature signal control fever tablet of receipts opens/stops.
The utility model embodiment, heating device can control opening/stopping for fever tablet according to the temperature signal detected,
When applied to camera module so that camera module may be implemented to go automatically under the weather conditions such as cold or humidity or environment frost,
The effect of demisting.Suitable for various fields such as on-vehicle lens, outdoor monitorings.
Further, non-limiting as preferred embodiments of the present invention, as shown in figure 8, temperature sensing circuit
Including at least temperature sensor 21, fever tablet has cyclic annular mainboard, and cyclic annular mainboard is installed with heater element, and temperature sensor 21 is set
In cyclic annular mainboard outer surface.Structure is simple, when being applied to camera module shown in Fig. 4, can obtain camera lens by temperature sensor
Temperature, if temperature is lower than preset value, it is meant that under the weather conditions such as cold or humidity or environment, tied on camera lens
Frost or the situation that hazes, then singlechip chip U10 controls fever tablet starting, realizes the effect for removing frost, demisting;Meanwhile temperature sensing
Device is set in fever tablet, can monitor the Current Temperatures of fever tablet in real time, if the Current Temperatures of fever tablet are excessively high, monolithic machine core
Piece U10 control fever tablet stops working or adjusts pwm control signal, can be automatic to close after frosting or the situation that hazes are eliminated
Backing is stopped paying out, avoids occurring high-temperature condition inside camera lens, influences lens performance.
Further, non-limiting as preferred embodiments of the present invention, as shown in Figure 1, singlechip chip
Driving circuit is provided between U10 and fever tablet, driving circuit includes triode Q1A and Q1B, voltage-stabiliser tube D3, power transistor
U8, resistance R28, resistance R29 and capacitor C49, C50, C51 and C52;Triode Q1B be positive-negative-positive pipe, emitter connection+
12V DC source, collector are grounded through resistance R29, the collector of base stage connecting triode Q1A;The emitter of triode Q1A
Ground connection, substrate are connected to singlechip chip U10 to obtain pwm control signal;The grid connecting triode of power transistor U8
The collector of Q1B, the emitter of source electrode connecting triode Q1B, and voltage-stabiliser tube D3 has been arranged in parallel between grid and source electrode
With resistance R28, drain electrode is connected to the heating device and is connected to described capacitor C49, C50, C51 and C52.
Further, as shown in Figure 1, it is non-limiting as preferred embodiments of the present invention, triode Q1B with+
Fuse F1 is provided between 12V DC source.
Further, non-limiting as preferred embodiments of the present invention, as shown in Fig. 2, temperature detection is electric
Road further includes set on the RC network between temperature sensor 21 and singlechip chip U10 input terminal, and RC network includes being parallel to temperature
Spend the resistance R31 and capacitor C53 between sensor output pin and ground terminal.Buffering is played to the output pulsation of temperature sensor to make
With avoiding external disturbance from having an impact the output electric signal of temperature sensor.
Further, non-limiting as preferred embodiments of the present invention, as shown in figure 3, further include for pair
The voltage conversion circuit that input supply voltage is depressured, the voltage conversion circuit includes voltage conversion chip U12 (model
LM53601MQDSXRQ1 or LM53601AQDSXRQ1), voltage-stabiliser tube D5, inductance coil L7, resistance R147, resistance R148, capacitor
C59, C60, C61 and C62, voltage conversion chip U12 have input terminal VIN, output end SW and feedback end FB, and input terminal VIN connects
Connect+12V DC source and it being arranged in parallel capacitor C61, C62 and voltage-stabiliser tube D5, output end SW is through inductance coil L7 generation+5V electricity
Pressure output, is provided with capacitor C59 between output end SW and feedback end FB, resistance R147 and R148 be connected in series in inductance coil L7 with
Between ground terminal, capacitor C60 is in parallel with resistance R147 and R148, and the tie point of resistance R147 and R148 are connected with feedback end FB.
Further, non-limiting as preferred embodiments of the present invention, temperature sensor 21 is NTC temperature-sensitive electricity
Resistance.
As shown in Figures 4 to 7, a kind of camera module with automatic heating function comprising camera lens 1 and be set to camera lens 1
On heating device described above, further includes:
Front housing 31 offers the shooting viewfinder window 30 opposite with camera lens 1;
Matrix 32 is matched with front housing 31, is equipped with mounting base, and the first heat dissipation cavity 311, mirror are formed between front housing 31
First 1 is set in mounting base and is located at the first heat dissipation cavity 311, and 1 front end of camera lens shoots viewfinder window 30 with front housing 31 and offsets;
Rear shell 33 is matched with matrix 32, and the second heat dissipation cavity 312, a pcb board 12 and matrix are formed between matrix 32
32 connections, and be located in the second heat dissipation cavity 312.Structure is simple, easy to assembly, compact, has great heat radiation effect.
In the present embodiment, heating device 2 is set between the first lens and lens barrel of camera lens 1, and the heating surface of heating device 2 is made
Image planes side for the first lens.Heating device directly acts on the first lens, can quickly remove frost, demisting.
Further, non-limiting as preferred embodiments of the present invention, as shown in figure 5,32 lower section of matrix
Sensitive chip 11 is equipped with 1 tail end corresponding position of camera lens.Structure is simple.
Still further, it is non-limiting as preferred embodiments of the present invention, as shown in figure 5, singlechip chip
U10, temperature sensing circuit, driving circuit and voltage conversion circuit be set to pcb board 12 on, above pcb board 12 be equipped with it is photosensitive
The port and the Wiring port being electrically connected with heating device 2 that chip 11 is electrically connected, lower section is equipped with image pickup signal coffret
121 and power interface 122.Structure is simple.
Further, non-limiting as preferred embodiments of the present invention, as shown in Figure 6, Figure 7, rear shell 33
It is equipped with opening 332 corresponding with power interface 122 and opening 331 corresponding with image pickup signal coffret 121.Knot
Structure is simple.
Further, non-limiting as preferred embodiments of the present invention, as shown in Figure 5, Figure 6, matrix 32
On a radiating convection holes 321 are offered by mounting base, the radiating convection holes 321 and the first heat dissipation cavity 311 and the second heat dissipation cavity
312 are connected to, and the electric connection line and connecting terminal on heating device 2 pass through the connecting terminal on radiating convection holes 321 and pcb board 12
Electrical connection.Structure is simple, good heat dissipation effect.
Still further, it is non-limiting as preferred embodiments of the present invention, as shown in Figure 5, Figure 6, heat dissipation pair
The area S1 and matrix area S2 of discharge orifice meet: S1:S2=1:2~4.Good heat dissipation effect.
Further, non-limiting as preferred embodiments of the present invention, as shown in Figures 5 to 7, front housing 31
Lower edge is equipped with the first positioning protrusion, and 32 upper surface of matrix is equipped with the first positioning groove, the first positioning protrusion and the first positioning groove
It matches, and is equipped with the first sealing ring 301 between the two;And/or along equipped with the second positioning protrusion, 32 following table of matrix in rear shell 33
Face is equipped with the second positioning groove, and the second positioning protrusion is matched with the second positioning groove, and is equipped with the second sealing ring between the two
302.Waterproof effect is good.
Further, non-limiting as preferred embodiments of the present invention, as shown in Figures 5 to 7, camera lens 1
Front end and front housing 31, which are shot, is equipped with third sealing ring 303 between viewfinder window 30.Waterproof effect is good.
Further, non-limiting as preferred embodiments of the present invention, as shown in Figures 4 to 7, front housing four
All sides are equipped with the radiating fin extended longitudinally, and rear shell surrounding side also is provided with the radiating fin extended longitudinally.Heat dissipation effect
Fruit is good.
The specific start-up and shut-down control principle of the utility model embodiment is to pass through the temperature sensing connecting in Fig. 2 with J3 interface
Device 21 obtains ambient temperature signal, then reads the electricity output of J3 interface by singlechip chip U10 and is become by A/D conversion
Voltage value is calculating current temperature T value according to the attribute of voltage value and temperature sensor 21, single if T is within a preset range
The heating device 2 or close its PWM pin that piece machine core piece U10 is not connect in operation diagram 1 with J4 interface, stop heating device 2
It only works, then proceedes to the value for obtaining temperature sensor 21, judge next second temperature T.If T is lower than the lower limit of preset range
Value, singlechip chip U10 start PWM pin, and heating device 2 is made to work or save PWM pin working condition.If T is higher than pre-
If the upper limit value of range, singlechip chip U10 closes PWM pin, and heating device 2 is made to stop working, and then proceedes to read temperature biography
The value of sensor 21 judges next second T, so recycles.
It is the one or more embodiments provided in conjunction with particular content as described above, does not assert the tool of the utility model
Body implementation is only limited to these instructions.It is all approximate with the method for the utility model, structure etc., identical or practical new for this
Several technology deduction or replace are made under type concept thereof, all should be considered as the protection scope of the utility model.
Claims (7)
1. a kind of heating device, characterized by comprising: singlechip chip, temperature sensing circuit and fever tablet, temperature detection
Circuit is electrically connected with the input terminal of singlechip chip, and the temperature signal that will test is sent to singlechip chip, fever tablet with
The output end of singlechip chip is electrically connected, and singlechip chip controls opening/stopping for fever tablet according to the received temperature signal of institute.
2. heating device as described in claim 1, which is characterized in that temperature sensing circuit includes at least temperature sensor, hair
Backing has cyclic annular mainboard, and cyclic annular mainboard is installed with heater element, and temperature sensor is set to cyclic annular mainboard outer surface.
3. heating device as claimed in claim 1 or 2, which is characterized in that be provided with drive between singlechip chip and fever tablet
Dynamic circuit, driving circuit include triode Q1A and Q1B, voltage-stabiliser tube D3, power transistor U8, resistance R28, resistance R29 and
Capacitor C49, C50, C51 and C52;Triode Q1B is positive-negative-positive pipe, and emitter connection+12V DC source, collector is through resistance
R29 ground connection, the collector of base stage connecting triode Q1A;The emitter of triode Q1A is grounded, and substrate is connected to single-chip microcontroller
Chip is to obtain pwm control signal;The collector of the grid connecting triode Q1B of power transistor U8, source electrode connect three poles
The emitter of pipe Q1B, and voltage-stabiliser tube D3 and resistance R28 have been arranged in parallel between grid and source electrode, drain electrode is connected to described
Fever tablet and it is connected to described capacitor C49, C50, C51 and C52.
4. heating device as claimed in claim 3, which is characterized in that be provided with guarantor between triode Q1B and+12V DC source
Dangerous silk F1.
5. heating device as claimed in claim 1 or 2, which is characterized in that temperature sensing circuit further includes being set to temperature sensing
RC network between device and singlechip chip input terminal, RC network include being parallel between temperature sensor output pin and ground terminal
Resistance R31 and capacitor C53.
6. heating device as claimed in claim 1 or 2, which is characterized in that further include for being dropped to input supply voltage
The voltage conversion circuit of pressure, the voltage conversion circuit include voltage conversion chip, voltage-stabiliser tube D5, inductance coil L7, resistance
R147, resistance R148, capacitor C59, C60, C61 and C62, voltage conversion chip have input terminal VIN, output end SW and feedback end
Connection+12V DC the source FB, input terminal VIN and it is arranged in parallel capacitor C61, C62 and voltage-stabiliser tube D5, output end SW is through inductance
Coil L7 generation+5V voltage output is provided with capacitor C59, resistance R147 and R148 series connection between output end SW and feedback end FB
Be connected between inductance coil L7 and ground terminal, capacitor C60 is in parallel with resistance R147 and R148, the tie point of resistance R147 and R148 with
Feedback end FB is connected.
7. heating device as claimed in claim 5, which is characterized in that temperature sensor is NTC thermistor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201822089855.2U CN209149043U (en) | 2018-12-12 | 2018-12-12 | Heating device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201822089855.2U CN209149043U (en) | 2018-12-12 | 2018-12-12 | Heating device |
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CN209149043U true CN209149043U (en) | 2019-07-23 |
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CN201822089855.2U Active CN209149043U (en) | 2018-12-12 | 2018-12-12 | Heating device |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111812921A (en) * | 2020-04-30 | 2020-10-23 | 广东弘景光电科技股份有限公司 | Raindrop detection element and camera module applying same |
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2018
- 2018-12-12 CN CN201822089855.2U patent/CN209149043U/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111812921A (en) * | 2020-04-30 | 2020-10-23 | 广东弘景光电科技股份有限公司 | Raindrop detection element and camera module applying same |
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