CN107276018A - A kind of circuit of protection running car image recording apparatus - Google Patents
A kind of circuit of protection running car image recording apparatus Download PDFInfo
- Publication number
- CN107276018A CN107276018A CN201710528666.8A CN201710528666A CN107276018A CN 107276018 A CN107276018 A CN 107276018A CN 201710528666 A CN201710528666 A CN 201710528666A CN 107276018 A CN107276018 A CN 107276018A
- Authority
- CN
- China
- Prior art keywords
- circuit
- protection circuit
- protection
- image recording
- recording apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
- H02H11/003—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection using a field effect transistor as protecting element in one of the supply lines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current additionally responsive to some other abnormal electrical conditions
- H02H3/105—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current additionally responsive to some other abnormal electrical conditions responsive to excess current and fault current to earth
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
- H02H9/047—Free-wheeling circuits
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
Abstract
The present invention relates to automotive field, specifically disclose a kind of circuit of protection running car image recording apparatus, including accessing the protection circuit in automobile, the protection circuit includes short-circuit protection circuit, anti-surge protection circuit, reverse connection prevention protection circuit, Width funtion design protection circuit and overvoltage crowbar, short-circuit protection circuit is accessed in the first order protection of whole protection circuit, anti-surge protection circuit is installed on short-circuit protection circuit output end, it is attempted by between battery and the earth, Width funtion design protection circuit accesses the output end in anti-surge protection circuit, it connects the positive and negative extreme of whole protection circuit, overvoltage crowbar is accessed in the output end of Width funtion design protection circuit, reverse connection prevention protection circuit is accessed in the loop in whole circuit.The present invention is in automotive electronics, using above-mentioned protection circuit, immeasurable loss caused by the reduction vehicle electronics that can be increased occur after exception, protects vehicle electronics normal operation.
Description
Technical field
The present invention relates to a kind of circuit, and in particular to a kind of circuit of protection running car image recording apparatus.
Background technology
Now, automobile popularization iterative method, the requirement of ride safety of automobile is improved constantly, to ensure that pedestrian, automobile etc. are handed over
The security of the lives and property of logical participant, therefore the installation number of running car image documentation equipment is more and more, is especially set with concealed
It is standby to install, it is representative directly from the equipment of automobile batteries power taking, increases obvious.But the use environment of automotive electronics is much more complicated than general
Logical consumer electronics, more protective redundancies are required for equipment electrical characteristic, compatibility, anti-interference, Anti-surging characteristic.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of circuit for protecting running car image recording apparatus, can be with
Immeasurable loss caused by the reduction vehicle electronics of increasing occur after exception, the operation of protection vehicle electronics is just
Often.
The present invention is achieved through the following technical solutions：A kind of circuit of protection running car image recording apparatus,
Including accessing the protection circuit in automobile, the protection circuit includes short-circuit protection circuit, anti-surge protection circuit, anti-reverse
Protection circuit, Width funtion design protection circuit and overvoltage crowbar, short-circuit protection circuit are accessed in whole protection circuit
In first order protection, anti-surge protection circuit is installed on short-circuit protection circuit output end, is attempted by between battery and the earth, wide electricity
Pressure design protection circuit accesses the output end in anti-surge protection circuit, and it connects the positive and negative extreme of whole protection circuit, overvoltage
Protection circuit is accessed in the output end of Width funtion design protection circuit, and reverse connection prevention protection circuit is accessed in the loop of whole circuit
In.
As preferred technical scheme, the short-circuit protection circuit works as back-end circuit using a 750mA/24V fuse
After appearance exception is short-circuit, fuse controls rapidly the generation of high current in transient protection, until the exception in circuit is released
When, fuse recovers path, low resistive state, and circuit recovers normal.
As preferred technical scheme, the anti-surge protection circuit uses an Anti-surging equipment.
As preferred technical scheme, the Anti-surging equipment is surging prevention pipe, disclosure satisfy that automotive electronics with level
Other surge impact, protection backend electronics component is unaffected.
As preferred technical scheme, the Width funtion design protection circuit uses the DCDC BUCK of 36V high withstand voltage scopes
IC, output current reaches 3A, meets the design requirement of most device currents.
As preferred technical scheme, overvoltage crowbar is using overvoltage protection IC, 24V Width funtion an input, in electricity
When pressure is higher than 26V, back end device is protected in cut-out input and output.
As preferred technical scheme, the reverse connection prevention protection circuit uses the diode of a SS24 specification.
The beneficial effects of the invention are as follows：The present invention is in automotive electronics, using above-mentioned protection circuit, the reduction that can be increased
Immeasurable loss caused by vehicle electronics occur after exception, protects vehicle electronics normal operation.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is system block diagram of the invention.
Embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine in any way.
This specification（Including any accessory claim, summary and accompanying drawing）Disclosed in any feature, except non-specifically is chatted
State, can alternative features equivalent by other or with similar purpose replaced.I.e., unless specifically stated otherwise, each feature
It is an example in a series of equivalent or similar characteristics.
As shown in figure 1, protection circuit therein includes short-circuit protection circuit, anti-surge protection circuit, anti-reverse protection electricity
Road, Width funtion design protection circuit and overvoltage crowbar, short-circuit protection circuit are accessed in the first order of whole protection circuit
In protection, anti-surge protection circuit is installed on short-circuit protection circuit output end, is attempted by between battery and the earth, Width funtion design
Protection circuit accesses the output end in anti-surge protection circuit, and it connects the positive and negative extreme of whole protection circuit, overvoltage protection electricity
Road is accessed in the output end of Width funtion design protection circuit, and reverse connection prevention protection circuit is accessed in the loop in whole circuit.
Short-circuit protection：Vehicle electronics are directly from automobile batteries power taking, once rear end equipment is short-circuit, it will in the short time
There are more than ten A, the short circuit current flow of even more high causes the wire rod of automotive interior, equipment moment generates heat, smolders, even on fire, draws
Send out security incident immeasurable.So in design, the protection of the first order uses 750mA/24V fuses, works as back-end circuit
After appearance exception is short-circuit, fuse controls rapidly the generation of high current in transient protection, until the exception in circuit is released
When, fuse recovers path, low resistive state, and circuit recovers normal.
Surging prevention：Automobile is in igniting start-up course, and cell voltage can have larger fluctuation moment, and fluctuate out
Thousands of W energy, if back end electronics are not protected by, most of electronic equipment can not bear the energy release of moment,
Cause the damage of various reverses.So in fuse rear end, a powerful Anti-surging equipment between battery and ground is attempted by,
Automotive electronics be disclosure satisfy that with the surge impact of rank, protection backend electronics component is unaffected.
Width funtion design protection：Electronics portion on automobile uses 5V Power Management Designs, and this is required directly from battery
The equipment of power taking in prime, it is necessary to increase voltage conversion circuit, in order to adapt to automobile batteries 12/24V Width funtion accommodation,
The DCDC BUCK IC of a 36V high withstand voltages scope are selected in design, output current reaches 3A, can meet most equipment
The design requirement of electric current, while the characteristic of Width funtion can ensure compatible most automobile storage battery use environment.
Overvoltage protection：The equipment of automotive electronics uses the DSP of advanced programming mostly, low to meet increasing high-performance
Power consumption demand.DSP needs voltage to be generally the low voltage amplitudes such as 1.05,1.55,3.3V.In the 12V of the automobile batteries such as power supply
Back-end circuit is supplied after 5V is depressured to use, and after the protection of prime, greatly absorbs the power-supply fluctuation influence of prime
It can be filtered, but there is the partial high pressure pulse of prime, it is also desirable to controlled, increase an overvoltage protection IC in design,
24V Width funtions are inputted, when voltage is higher than 26V, and back end device is protected in cut-out input and output.
Anti-reverse protection：There is operating personnel's misoperation during actual installation, unavoidably in vehicle electronics,
The situation of both positive and negative polarity setup error occurs, and causes to damage electronic equipment.One SS24 specification of concatenation in the design of main power source
Diode, once there is setup error, due to the reverse cut-off characteristics of diode, cuts off current loop, protection circuit not good damage
It is bad.
The beneficial effects of the invention are as follows：The present invention is in automotive electronics, using above-mentioned protection circuit, the reduction that can be increased
Immeasurable loss caused by vehicle electronics occur after exception, protects vehicle electronics normal operation.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
The change or replacement expected without creative work, should all be included within the scope of the present invention.Therefore, it is of the invention
Protection domain should be determined by the scope of protection defined in the claims.
Claims (7)
1. a kind of circuit of protection running car image recording apparatus, it is characterised in that：Including accessing the electricity of the protection in automobile
Road, the protection circuit includes short-circuit protection circuit, anti-surge protection circuit, reverse connection prevention protection circuit, Width funtion design protection
Circuit and overvoltage crowbar, short-circuit protection circuit are accessed in the first order protection of whole protection circuit, surging prevention
Circuit is installed on short-circuit protection circuit output end, is attempted by between battery and the earth, and Width funtion design protection circuit is accessed in anti-
The output end of surge protection circuit, it connects the positive and negative extreme of whole protection circuit, and overvoltage crowbar is accessed to be set in Width funtion
The output end of protection circuit is counted, reverse connection prevention protection circuit is accessed in the loop in whole circuit.
2. the circuit of running car image recording apparatus is protected as claimed in claim 1, it is characterised in that：The short-circuit protection
Circuit is using a 750mA/24V fuse, and after back-end circuit occurs abnormal short-circuit, fuse is gripped rapidly in transient protection
The generation of high current is made, when the exception in circuit is released, fuse recovers path, low resistive state, and circuit recovers normal.
3. the circuit of running car image recording apparatus is protected as claimed in claim 1, it is characterised in that：The Anti-surging is protected
Protection circuit uses an Anti-surging equipment.
4. the circuit of running car image recording apparatus is protected as claimed in claim 3, it is characterised in that：The Anti-surging is set
Standby is surging prevention pipe, disclosure satisfy that automotive electronics with the surge impact of rank, protection backend electronics component is unaffected.
5. the circuit of running car image recording apparatus is protected as claimed in claim 1, it is characterised in that：The Width funtion
Design protection circuit uses the DCDC BUCK IC of 36V high withstand voltage scopes, and output current reaches 3A, meets most equipment electricity
The design requirement of stream.
6. the circuit of running car image recording apparatus is protected as claimed in claim 1, it is characterised in that：Overvoltage protection electricity
Road is using overvoltage protection IC, 24V Width funtion an input, and when voltage is higher than 26V, cut-out input is with output, end-apparatus after protection
Part.
7. the circuit of running car image recording apparatus is protected as claimed in claim 1, it is characterised in that：The anti-reverse guarantor
Protection circuit uses the diode of a SS24 specification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710528666.8A CN107276018A (en) | 2017-07-01 | 2017-07-01 | A kind of circuit of protection running car image recording apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710528666.8A CN107276018A (en) | 2017-07-01 | 2017-07-01 | A kind of circuit of protection running car image recording apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107276018A true CN107276018A (en) | 2017-10-20 |
Family
ID=60070773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710528666.8A Pending CN107276018A (en) | 2017-07-01 | 2017-07-01 | A kind of circuit of protection running car image recording apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107276018A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101277009A (en) * | 2007-03-30 | 2008-10-01 | 卢浩义 | Vehicle power supply circuit as well as semiconductor protection control system of electric apparatus electronic equipments |
| CN103346550A (en) * | 2013-07-31 | 2013-10-09 | 哈尔滨威星动力电源科技开发有限责任公司 | Voltage surge protection circuit of battery management system suitable for electric car |
| CN103715659A (en) * | 2013-12-18 | 2014-04-09 | 青岛海信网络科技股份有限公司 | Vehicle-mounted power supply protective circuit |
| CN104393643A (en) * | 2014-11-27 | 2015-03-04 | 江西洪都航空工业集团有限责任公司 | Missile-borne remote-measuring system power manager |
| CN105186846A (en) * | 2015-09-30 | 2015-12-23 | 合肥华耀电子工业有限公司 | Surge suppression circuit with input reverse connection preventing function |
| CN205429721U (en) * | 2015-11-09 | 2016-08-03 | 河北优控新能源科技有限公司 | Vehicle control unit prevents transposition and prevents surge and prevent protection circuit that overflows |
-
2017
- 2017-07-01 CN CN201710528666.8A patent/CN107276018A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101277009A (en) * | 2007-03-30 | 2008-10-01 | 卢浩义 | Vehicle power supply circuit as well as semiconductor protection control system of electric apparatus electronic equipments |
| CN103346550A (en) * | 2013-07-31 | 2013-10-09 | 哈尔滨威星动力电源科技开发有限责任公司 | Voltage surge protection circuit of battery management system suitable for electric car |
| CN103715659A (en) * | 2013-12-18 | 2014-04-09 | 青岛海信网络科技股份有限公司 | Vehicle-mounted power supply protective circuit |
| CN104393643A (en) * | 2014-11-27 | 2015-03-04 | 江西洪都航空工业集团有限责任公司 | Missile-borne remote-measuring system power manager |
| CN105186846A (en) * | 2015-09-30 | 2015-12-23 | 合肥华耀电子工业有限公司 | Surge suppression circuit with input reverse connection preventing function |
| CN205429721U (en) * | 2015-11-09 | 2016-08-03 | 河北优控新能源科技有限公司 | Vehicle control unit prevents transposition and prevents surge and prevent protection circuit that overflows |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103715659B (en) | Vehicle-mounted power supply protective circuit | |
| CN202333771U (en) | Power supply protection circuit and engineering machinery | |
| CN107276401A (en) | Power conditioning circuitry inherently | |
| US20090141414A1 (en) | Protection circuit for electric power of a car | |
| CN107845998A (en) | Input power supply health detection and management circuit in a kind of power sources in parallel redundant system | |
| CN205453489U (en) | Electric vehicle battery management system power EMC circuit | |
| CN204886175U (en) | Antisurge module | |
| CN103986148A (en) | Lightning protection circuit of RS485 communication line | |
| CN101982921B (en) | Universal high-voltage capacitor energy storage module | |
| CN203618196U (en) | Anti-surge circuit and integrated circuit comprising same | |
| CN202997539U (en) | A super capacitor voltage balance protection circuit | |
| CN209767151U (en) | vehicle-mounted pavement quality sensing equipment | |
| CN107276018A (en) | A kind of circuit of protection running car image recording apparatus | |
| CN204361769U (en) | A kind of power circuit with solar energy and civil power duplicate supply interface | |
| CN203826946U (en) | Cell explosionproof circuit and cell charging circuit | |
| CN102315629A (en) | Protection circuit and electronic device with same | |
| CN2455516Y (en) | Over voltage stabilizer for vehicle | |
| CN207426659U (en) | A kind of automobile electrical equipment protection circuit | |
| CN208890369U (en) | A kind of military equipment and subsystem 220V AC power source input port protection circuit | |
| JP2013211119A (en) | Led lighting device and luminaire using the same | |
| CN104466933B (en) | A kind of limit energy intrinsically safe circuit | |
| CN102288808A (en) | LED (light-emitting diode) over-current detection circuit and LED driving control circuit | |
| CN107394748A (en) | A kind of automobile electrical equipment protection circuit | |
| CN203839933U (en) | Automobile chassis circuit protection system | |
| CN215817532U (en) | Airplane power supply protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171020 |