CN207638760U - A kind of dust-proof video camera of high definition - Google Patents
A kind of dust-proof video camera of high definition Download PDFInfo
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- CN207638760U CN207638760U CN201721888415.2U CN201721888415U CN207638760U CN 207638760 U CN207638760 U CN 207638760U CN 201721888415 U CN201721888415 U CN 201721888415U CN 207638760 U CN207638760 U CN 207638760U
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Abstract
The utility model discloses a kind of dust-proof video cameras of high definition, including：Dust detection circuit, the dust detection circuit include：External power supply, reference voltage, dust sensor, second resistance, amplifier, 3rd resistor, the first capacitance, comparator, integrated chip 555, third capacitance, the 4th capacitance, the 5th resistance, the 6th resistance, power amplifier, controller and laser lamp；The utility model can monitor the dust on video camera in real time, incude sensitive, fast response time, if the dust content of detection influences to automatically turn on laser lamp when photographic quality, it is not necessarily to manual operation, intelligence degree is high, it is effectively prevented from negative effect of the subtle suspended particulate of air to video image quality, the circuit design is simple simultaneously, stable and reliable in work, at low cost.
Description
Technical field
The utility model belongs to field of cameras, and in particular to a kind of dust-proof video camera of high definition.
Background technology
Video camera is that optical image signal is changed into electric signal, in order to store or transmit.When we shoot one
When object, the light reflected on this object is collected by camera lens, it is made to focus on the light-receiving surface of picture pick-up device (such as pick-up tube
Target surface) on, then luminous energy is changed into get having arrived " vision signal " by picture pick-up device by electric energy.Photosignal is very faint, needs
It is amplified by pre-arcing road, is handled and adjusted using various circuits, the standard signal finally obtained can be sent to
It is recorded on the recording mediums such as video recorder, or propagates or be sent on monitor by broadcasting system and show.
Currently, video camera use, than wide, after long-time use, the inside more or less will appear product to video camera
Ash, will appear after of long duration partial short-circuit, electric leakage, heater element heat dissipation it is bad etc. caused by various failures etc., influence video camera
Service life, while shooting effect can be also seriously affected on camera protective glass after dust stratification, existing dust-proof camera shooting is quick-witted
It can change that degree is low, the dust that cannot in real time monitor on video camera reaches dust-proof effect to take measures on customs clearance.
Utility model content
For the technological deficiency for overcoming existing dust-proof video camera intelligence degree low, the utility model discloses a kind of high definitions
Dust-proof video camera.
Technical solution adopted by the utility model to solve its technical problems is a kind of dust-proof video cameras of high definition, including：Powder
Dirt detection circuit, the dust detection circuit include：External power supply, reference voltage, dust sensor, second resistance, amplifier,
3rd resistor, the first capacitance, comparator, integrated chip 555, third capacitance, the 4th capacitance, the 5th resistance, the 6th resistance, work(
It puts, controller and laser lamp；
The dust sensor is attached at the lower surface of camera housing, before the laser lamp is mounted on camera housing
The input terminal at end, dust sensor connects external power supply, the in-phase end of the signal output end connection amplifier of dust sensor, powder
The signal output end of dust sensor is also grounded by second resistance, and the reverse side of amplifier connects amplifier by 3rd resistor
The power end of output end, amplifier connects external power supply, and the ground terminal of amplifier passes through the first capacity earth, the output of amplifier
The reverse side of the in-phase end of end connection comparator, comparator connects reference voltage, and the output end of comparator connects integrated chip 555
R pins, the TR pins of integrated chip 555 connect the DIS pins of integrated chip 555 by the 6th resistance, integrated chip 555
TR pins are also connected with the THR pins of integrated chip 555, and the CV pins of integrated chip 555 pass through concatenated third capacitance and the 4th
The THR pins of capacitance connection integrated chip 555, third capacitance and the 4th concatenated common end grounding of capacitance, integrated chip 555
GND pin is grounded, and the DIS pins of integrated chip 555 connect the VCC pin of integrated chip 555, integrated chip by the 5th resistance
555 VCC pin connects external power supply, the first end of the Q pin connection power amplifier of integrated chip 555, the first end connection of power amplifier
The output end of the input terminal of controller, controller connects laser lamp, the GND pin of the second end connection integrated chip 555 of power amplifier.
Further, the 5th capacitance, the 5th electricity are also associated between the Q pin and power amplifier of the integrated chip 555
The Q pin of the first end connection integrated chip 555 of appearance, the first end of the second end connection power amplifier of the 5th capacitance.
The 4th resistance and second is also associated between the output end of the comparator and the R pins of integrated chip 555 to shine
Diode, the output end of the first end connection comparator of the 4th resistance, the second end connection second luminous two of the 4th resistance
The anode of pole pipe, the R pins of the cathode connection integrated chip 555 of the second light emitting diode.
The dust detection circuit further includes optical coupling isolator, and the input terminal of the optical coupling isolator connects dust sensor
Signal output end, optical coupling isolator output end connection amplifier in-phase end.
Further, also it is connected in series with the second capacitance between the power end and ground of the amplifier.
Zener diode and the first light emitting diode are also associated between the input terminal and ground of the dust sensor, it is described
The cathode of the input terminal connection zener diode of dust sensor, the anode of zener diode connect the sun of the first light emitting diode
Pole, the minus earth of the first light emitting diode.
The utility model has the beneficial effects that：The utility model can monitor the dust on video camera in real time, and induction is sensitive, ring
It answers speed fast, if the dust content of detection influences to automatically turn on laser lamp when photographic quality, is not necessarily to manual operation, intelligence degree
Height is effectively prevented from negative effect of the subtle suspended particulate of air to video image quality, while the circuit design is simple, the operation is stable
Reliably, at low cost.
Description of the drawings
Fig. 1 is a kind of circuit diagram of the dust detection circuit of the dust-proof video camera of high definition of the utility model.
Reference numeral：The first light emitting diode of UC-external power supply, DW-zener diode, L1-, R1- dust sensors,
R2- second resistances, OC-optical coupling isolator, U1- amplifiers, R3- 3rd resistors, the first capacitances of C1-, the second capacitances of C2-, U2-
Comparator, U0- reference voltages, the 4th resistance of R4-, the second light emitting diodes of L2-, C3- third capacitances, the 4th capacitances of C4-, C5-
5th capacitance, 555- integrated chips 555, the 5th resistance of R5-, the 6th resistance of R6-, BP-power amplifier, R-R pins, TR-TR pins,
DIS-DIS pins, CV- CV pins, THR-THR pins, GND-GND pins, VCC-VCC pin, Q-Q pins.
Specific implementation mode
More detailed description is done to the embodiment of the utility model below in conjunction with attached drawing and reference numeral, makes to be familiar with ability
The technology people in domain can implement according to this after studying this specification carefully.It should be appreciated that specific embodiment described herein is only solving
The utility model is released, is not used to limit the utility model.
A kind of dust-proof video camera of high definition, including：Dust detection circuit, the dust detection circuit include：External power supply UC,
Reference voltage U0, dust sensor R1, second resistance R2, amplifier U1,3rd resistor R3, the first capacitance C1, comparator U2, collection
At chip 555, third capacitance C3, the 4th capacitance C4, the 5th resistance R5, the 6th resistance R6, power amplifier BP, controller and laser lamp；
The dust sensor R1 is attached at the lower surface of camera housing, and the laser lamp is mounted on camera housing
The input terminal of front end, dust sensor R1 connects external power supply UC, the signal output end connection amplifier U1 of dust sensor R1
In-phase end, the signal output end of dust sensor R1 is also grounded by second resistance R2, and the reverse side of amplifier U1 passes through
The power end of the output end of three resistance R3 connection amplifiers U1, amplifier U1 connects external power supply UC, the ground terminal of amplifier U1
Pass through the first capacitance C1 ground connection, the in-phase end of the output end connection comparator U2 of amplifier U1, the reverse side connection of comparator U2
The R pin R of the output end connection integrated chip 555 of reference voltage U0, comparator U2, the TR pins TR of integrated chip 555 pass through
The DIS pin DIS of 6th resistance R6 connections integrated chip 555, the TR pins TR of integrated chip 555 are also connected with integrated chip 555
THR pin THR, the CV pins CV of integrated chip 555 passes through concatenated third capacitance C3 and the 4th capacitance C4 connections integrate core
THR the pin THR, third capacitance C3 of piece 555 and the 4th concatenated common end groundings of capacitance C4, the GND pin of integrated chip 555
GND is grounded, and the DIS pins DIS of integrated chip 555 is integrated by the VCC pin VCC of the 5th resistance R5 connections integrated chip 555
The VCC pin VCC connection external power supply UC of chip 555, the first end of the Q pin Q connection power amplifiers BP of integrated chip 555, power amplifier
The output end of the input terminal of the first end connection controller of BP, controller connects laser lamp, and the second end connection of power amplifier BP is integrated
The GND pin GND of chip 555；Each pin of chip is defined by the specification disclosed in its production firm, the amplifier
U1,3rd resistor R3 and the first capacitance C1 form voltage follow unit, and voltage follow unit buffering, isolation improve band load energy
The effect of power ensures that the original signal distortion factor is minimum, and the voltage of the first capacitance C1 hold amplifier U1 ground terminals GND will not be mutated, and be protected
It is fixed to keep steady, and 3rd resistor R3 provides negative-feedback for amplifier U1, so that signal input is equal to signal and exports, step-down amplifier U1 outputs
Error, the dust sensor R1 cause resistance value to change according to the dust detected, export analog signal, second electricity
Resistance R2 is divider resistance, and the in-phase end of the comparator U2 receives the analog voltage signal of dust sensor R1, by the voltage with
The reference voltage U0 of outside access makes comparisons, and the reference voltage U0 is alarm threshold value voltage；If input voltage is more than benchmark electricity
U0, comparator U2 is pressed to export high level, the alarm that high level input is made of 555 timers causes power amplifier BP and sends out buzzing
Sound realizes alarm, and while alarm, controller receives signal control laser lamp card and opens, otherwise does not alarm, and laser lamp closes
It closes；Since laser lamp is for higher see-through capabilities, under the radiation of laser lamp, in the video captured by camera lens
Be not in the subtle suspended particulate in air in appearance, image quality is clear, to reach dust-proof effect.
The 5th capacitance C5, the 5th capacitance C5 are also associated between the Q pin Q and power amplifier BP of the integrated chip 555
First end connection integrated chip 555 Q pin Q, the 5th capacitance C5 second end connection power amplifier BP first end；Described 5th
Capacitance C5 is decoupling filter capacitor.
It is also associated with the 4th resistance R4 and second between the output end of the comparator U2 and the R pins R of integrated chip 555
The output end of the first end connection comparator U2 of light emitting diode L2, the 4th resistance R4, the second end of the 4th resistance R4 connect
Meet the anode of the second light emitting diode L2, the R pins R of the cathode connection integrated chip 555 of the second light emitting diode L2；If comparing
When device U2 output high level alarm, the second light emitting diode L2 conductings shine, and the 4th resistance R4 is current-limiting resistance, protection the
Two light emitting diode L2.
The dust detection circuit further includes optical coupling isolator OC, and the input terminal connection dust of the optical coupling isolator OC passes
The signal output end of sensor R1, the in-phase end of the output end connection amplifier U1 of optical coupling isolator OC；The optical coupling isolator drop
The low interference being electrically connected between sensor detection circuit part and comparison circuit part, the accurate of entire circuit detection of deducting a percentage
Degree, improves the serious forgiveness of system.
The second capacitance C2 is also connected in series between the power end and ground of the amplifier U1；Second capacitance C2 keeps amplification
The voltage for the power end UC that device U1 is connect will not be mutated, and improve the stability of circuit work.
It is also associated with zener diode DW and the first light emitting diode between the input terminal and ground of the dust sensor R1
The cathode of the input terminal connection zener diode DW of L1, the dust sensor R1, the anode connection first of zener diode DW
The anode of light emitting diode L1, the minus earth of the first light emitting diode L1；The zener diode DW stablizes dust sensor
The voltage at the both ends R1 protects dust sensor R1, if the first light emitting diode L1 luminous promptings when zener diode DW is breakdown
Circuit damages, and observation is apparent.
The above content is the further descriptions made to the utility model in conjunction with specific preferred embodiment, cannot recognize
Determine specific embodiment of the present utility model and is confined to these explanations.For the common skill of the utility model technical field
For art personnel, the other embodiment obtained in the case where not departing from the technical solution of the utility model should be included in this practicality
In novel protection domain.
Claims (6)
1. a kind of dust-proof video camera of high definition, it is characterised in that：Including：Dust detection circuit, the dust detection circuit include：Outside
Connect power supply（UC）, reference voltage（U0）, dust sensor（R1）, second resistance（R2）, amplifier（U1）, 3rd resistor（R3）、
First capacitance（C1）, comparator（U2）, integrated chip 555, third capacitance（C3）, the 4th capacitance（C4）, the 5th resistance（R5）,
Six resistance（R6）, power amplifier（BP）, controller and laser lamp；
The dust sensor（R1）It is attached at the lower surface of camera housing, before the laser lamp is mounted on camera housing
End, dust sensor（R1）Input terminal connect external power supply（UC）, dust sensor（R1）Signal output end connection amplification
Device（U1）In-phase end, dust sensor（R1）Signal output end also pass through second resistance（R2）Ground connection, amplifier（U1）'s
Reverse side passes through 3rd resistor（R3）Connect amplifier（U1）Output end, amplifier（U1）Power end connect external power supply
（UC）, amplifier（U1）Ground terminal pass through the first capacitance（C1）Ground connection, amplifier（U1）Output end connect comparator（U2）
In-phase end, comparator（U2）Reverse side connect reference voltage（U0）, comparator（U2）Output end connect integrated chip 555
R pins（R）, the TR pins of integrated chip 555（TR）Pass through the 6th resistance（R6）Connect the DIS pins of integrated chip 555
（DIS）, the TR pins of integrated chip 555（TR）It is also connected with the THR pins of integrated chip 555（THR）, the CV of integrated chip 555
Pin（CV）Pass through concatenated third capacitance（C3）With the 4th capacitance（C4）Connect the THR pins of integrated chip 555（THR）, the
Three capacitances（C3）With the 4th capacitance（C4）Concatenated common end grounding, the GND pin of integrated chip 555（GND）Ground connection integrates core
The DIS pins of piece 555（DIS）Pass through the 5th resistance（R5）Connect the VCC pin of integrated chip 555（VCC）, integrated chip 555
VCC pin（VCC）Connect external power supply（UC）, the Q pin of integrated chip 555（Q）Connect power amplifier（BP）First end, power amplifier
（BP）First end connection controller input terminal, the output end of controller connects laser lamp, power amplifier（BP）Second end connection
The GND pin of integrated chip 555（GND）.
2. a kind of dust-proof video camera of high definition as described in claim 1, it is characterised in that：The Q pin of the integrated chip 555
（Q）With power amplifier（BP）Between be also associated with the 5th capacitance（C5）, the 5th capacitance（C5）First end connect integrated chip 555
Q pin（Q）, the 5th capacitance（C5）Second end connect power amplifier（BP）First end.
3. a kind of dust-proof video camera of high definition as described in claim 1, it is characterised in that：The comparator（U2）Output end with
The R pins of integrated chip 555（R）Between be also associated with the 4th resistance（R4）With the second light emitting diode（L2）, the 4th electricity
Resistance（R4）First end connect comparator（U2）Output end, the 4th resistance（R4）Second end connect the second light emitting diode
（L2）Anode, the second light emitting diode（L2）Cathode connection integrated chip 555 R pins（R）.
4. a kind of dust-proof video camera of high definition as described in claim 1, it is characterised in that：The dust detection circuit further includes light
Coupling isolator（OC）, the optical coupling isolator（OC）Input terminal connect dust sensor（R1）Signal output end, optocoupler every
From device（OC）Output end connect amplifier（U1）In-phase end.
5. a kind of dust-proof video camera of high definition as claimed in claim 4, it is characterised in that：The amplifier（U1）Power end with
The second capacitance is also connected in series between ground（C2）.
6. a kind of dust-proof video camera of high definition as described in claim 1, it is characterised in that：The dust sensor（R1）Input
It is also associated with zener diode between end and ground（DW）With the first light emitting diode（L1）, the dust sensor（R1）Input
End connection zener diode（DW）Cathode, zener diode（DW）Anode connect the first light emitting diode（L1）Anode,
First light emitting diode（L1）Minus earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721888415.2U CN207638760U (en) | 2017-12-29 | 2017-12-29 | A kind of dust-proof video camera of high definition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721888415.2U CN207638760U (en) | 2017-12-29 | 2017-12-29 | A kind of dust-proof video camera of high definition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207638760U true CN207638760U (en) | 2018-07-20 |
Family
ID=62851959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721888415.2U Active CN207638760U (en) | 2017-12-29 | 2017-12-29 | A kind of dust-proof video camera of high definition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207638760U (en) |
-
2017
- 2017-12-29 CN CN201721888415.2U patent/CN207638760U/en active Active
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