CN209258041U - A kind of power-off protecting circuit for mobile unit, apparatus and system - Google Patents
A kind of power-off protecting circuit for mobile unit, apparatus and system Download PDFInfo
- Publication number
- CN209258041U CN209258041U CN201821779347.0U CN201821779347U CN209258041U CN 209258041 U CN209258041 U CN 209258041U CN 201821779347 U CN201821779347 U CN 201821779347U CN 209258041 U CN209258041 U CN 209258041U
- Authority
- CN
- China
- Prior art keywords
- unit
- power
- hard disk
- power supply
- control unit
- 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.)
- Active
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model belongs to electronic circuit technology field; provide a kind of power-off protecting circuit for mobile unit, apparatus and system; control instruction is exported when detecting vehicle power supply power-off by single chip control unit; charge/discharge unit is used in vehicle power supply power-off; electric discharge the first predeterminated voltage signal of output stores the data recorded in real time so that system control unit controls hard disk unit according to control instruction within a preset time with maintaining to power to single chip control unit, system control unit and hard disk unit.It is thus achieved that in vehicle power supply power-off; hard disk unit has time enough to store the data recorded in real time; the problem of avoiding loss of data; solve the existing power-off protection technology for mobile unit there is the automobile data recorder of 3.5 cun of hard disks because external power supply destroy in the case where, the problem of can not data be recorded and be stored in real time.
Description
Technical field
The utility model belongs to electronic circuit technology field more particularly to a kind of power-off protection electricity for mobile unit
Road, apparatus and system.
Background technique
The commerial vehicle of the hard and fast rule of national standard GB/T 19056-2012 file, road driving installs automobile running record
Instrument proposes detailed requirement in the event of a power failure, for hard-disc storage, and clear stipulaties automobile travel recorder is necessary
It completely can record and analyze vehicle Video data.But it is influenced by automobile interior exterior portion complex environment, is especially touched in vehicle
It hits, in the case that the factors such as artificial destruction lead to automobile travel recorder burst power-off, this moment inside automobile travel recorder
Hard disk because burst power down cannot work and real-time, complete video frames can not be recorded to, this also to later period evidence-gathering without
Method provides effective foundation.How similar problems are accurately solved, is that all automobile travel recorder designs producer needs emphasis to examine
The problem of worry.
To solve the above-mentioned problems, current common practice there are two main ways:
The first way: increase UPS (Uninterruptible Power in the front end of automobile travel recorder equipment
System/Uninterruptible Power Supply, uninterruptible power supply), it is supplied using UPS to automobile travel recorder
Electricity, the program can guarantee to be continued to power to automobile travel recorder in the case that external power supply is closed, but has certain limitation
Property, in terms of disadvantage shows following two:
1) cost is expensive, needs additionally to increase the cost of UPS；
2) with reference to figure one, in the case that vehicle power supply is destroyed to the front end UPS power supply (cable A), automobile travel recorder
It can continue to completely record a video.But if the rear end UPS power supply is destroyed (cable to this region of automobile travel recorder
B), the hard disk instant power-down inside automobile travel recorder does not work, video recording picture that is same or can not being recorded to real-time full
Face, therefore there is certain limitation.
Second of way: in order to solve the problems, such as the first, part designs producer and starts to increase inside automobile travel recorder
Add farad capacitor, i.e., in the case that external power supply is destroyed, using the storage characteristic of farad capacitor come to automobile travel recorder
Power supply.It is the advantage that can guarantee in cost compared to the first way, and can guarantee automobile travel recorder not by external power down shadow
It rings.But farad capacitor pressure resistance low capacity is small, is only applicable to the low-power consumption automobile travel recorder such as 2.5 cun of hard disks, 3.5 cun of hard disks by
In the big characteristic of power consumption, make farad capacitor that can not power by existing framework to it.In existing framework, if directly using farad electricity
The 12V power supply of appearance is worthless to hard disk power supply.Due to external power supply shutdown after, farad capacitor start discharge 12V voltage by
Step decline, and the 12V power requirement of hard disk must not be lower than the 10% of working power, while which results in being electrically turn off outside, electricity
Drops cause the 12V of hard disk also to stopped work at once, and system control unit is unable to complete the preservation and unloading of hard disc data,
There are the risks that hard disc data is lost.Under the influence of monitoring high Qinghua of environment requires increasing to hard-disk capacity, 3.5 are used
The automobile travel recorder of very little big capacity hard disk is extremely urgent.
Therefore, the existing power-off protection technology for mobile unit there is the automobile data recorder of 3.5 cun of hard disks because
In the case that external power supply destroys, the problem of can not data be recorded and be stored in real time.
Utility model content
The purpose of this utility model is to provide a kind of power-off protecting circuit for mobile unit, apparatus and system, purports
Solving the existing power-off protection technology for mobile unit, there is the automobile data recorders of 3.5 cun of hard disks because in external power supply
In the case where destruction, the problem of can not data be recorded and be stored in real time.
The utility model first aspect provides a kind of power-off protecting circuit for mobile unit, the power-off protection electricity
Road includes:
Voltage transformation unit, the first pressure unit, the second pressure unit, third pressure unit, current limiting unit, charge/discharge unit with
And boosting unit；
The input terminal of the voltage transformation unit connects vehicle power supply, and the output end of the voltage transformation unit is connect by the current limiting unit
The charge/discharge unit, the input terminal of first pressure unit, the input terminal of second pressure unit and the boosting
The input terminal of unit connects the current limiting unit respectively, and the output end of first pressure unit connects single chip control unit, described
On the one hand the output end of the output terminating systems control unit of second pressure unit, the boosting unit connects hard disk unit, another
Aspect connects the hard disk unit by the third pressure unit；
The output first after the voltage transformation unit carries out voltage transformation of the voltage signal of the vehicle power supply output is default
On the one hand voltage signal, the first predeterminated voltage signal pass through the current limiting unit and charge to the charge/discharge unit；
On the other hand after carrying out decompression processing by first pressure unit and second pressure unit respectively, output second is default
Voltage signal is respectively powered the single chip control unit and the system control unit；Another further aspect passes through the liter
After pressure unit carries out boosting processing, output third predeterminated voltage signal is powered the hard disk unit, and the third
Predeterminated voltage signal exports the 4th predeterminated voltage signal to the hard disk after the third pressure unit carries out decompression processing
Unit is powered；
The single chip control unit exports control instruction, the charge and discharge list when detecting vehicle power supply power-off
Member is in vehicle power supply power-off, electric discharge to export the first predeterminated voltage signal to maintain to control the single-chip microcontroller
Unit, the system control unit and hard disk unit power supply, so that the system control unit refers to according to the control
Order controls the hard disk unit within a preset time and stores to the data recorded in real time.
The utility model second aspect provides a kind of power-off protection apparatus for mobile unit, including single-chip microcontroller control
Unit, system control unit and hard disk unit, the power-off protection apparatus further include power-off protecting circuit as described above.
The utility model third aspect provides a kind of circuit breaking protective system for mobile unit, including vehicle power supply,
The circuit breaking protective system further includes power-off protection apparatus as described above.
A kind of power-off protecting circuit for mobile unit provided by the utility model, apparatus and system, pass through single-chip microcontroller
Control unit exports control instruction when detecting vehicle power supply power-off, and charge/discharge unit is used to put in vehicle power supply power-off
Electricity output the first predeterminated voltage signal with maintain to single chip control unit, system control unit and hard disk unit power, with
Make system control unit control hard disk unit within a preset time according to control instruction to store the data recorded in real time.By
This is realized in vehicle power supply power-off, and hard disk unit has time enough to store the data recorded in real time, avoids
The problem of loss of data, solving the existing power-off protection technology for mobile unit, there is the driving of 3.5 cun of hard disks notes
Record instrument because external power supply destruction in the case where, the problem of can not data be recorded and be stored in real time.
Detailed description of the invention
Fig. 1 is the attachment structure schematic diagram being powered to automobile travel recorder that the prior art is related to.
Fig. 2 is that a kind of cellular construction of power-off protecting circuit for mobile unit provided by the embodiment of the utility model shows
Example diagram.
Fig. 3 is a kind of examples of circuits of power-off protecting circuit for mobile unit provided by the embodiment of the utility model
Figure.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
A kind of above-mentioned power-off protecting circuit for mobile unit, apparatus and system, are existed by single chip control unit
Control instruction is exported when detecting vehicle power supply power-off, charge/discharge unit is used for the electric discharge output first in vehicle power supply power-off
Predeterminated voltage signal is to maintain to power to single chip control unit, system control unit and hard disk unit, so that system controls
Unit controls hard disk unit according to control instruction within a preset time and stores to the data recorded in real time.It is thus achieved that
When vehicle power supply powers off, hard disk unit has time enough to store the data recorded in real time, avoids loss of data
Problem.Above-mentioned power-off protecting circuit, apparatus and system for mobile unit can be applied to vehicle-mounted digital video recorder, vehicle-mounted automobile
The vehicle-mounted security-monitorings relevant device such as Tachographs.
Fig. 2 shows a kind of unit knots of the power-off protecting circuit for mobile unit provided by the embodiment of the utility model
Structure, for ease of description, only the parts related to this embodiment are shown, and details are as follows:
A kind of above-mentioned power-off protecting circuit for mobile unit, including voltage transformation unit 101, the first pressure unit 104,
Two pressure units 105, third pressure unit 107, current limiting unit 102, charge/discharge unit 103 and boosting unit 106.
The input terminal of voltage transformation unit 101 connects vehicle power supply 201, and the output end of voltage transformation unit 101 is connect by current limiting unit 102
Charge/discharge unit 103, the input terminal and boosting unit 106 of the input terminal of the first pressure unit 104, the second pressure unit 105
Input terminal connect current limiting unit 102 respectively, the output end of the first pressure unit 104 connects single chip control unit 108, the second decompression
On the one hand the output end of the output terminating systems control unit 109 of unit 105, boosting unit 106 connects hard disk unit 110, another
Aspect connects the hard disk unit 110 by third pressure unit 107.
The voltage signal that vehicle power supply 201 exports default electricity of output first after voltage transformation unit 101 carries out voltage transformation
Signal is pressed, on the one hand the first predeterminated voltage signal passes through current limiting unit 102 and charges to charge/discharge unit 103；On the other hand
After carrying out decompression processing by the first pressure unit 104 and the second pressure unit 105 respectively, output the second predeterminated voltage signal point
It is other that single chip control unit 108 and system control unit 109 are powered；Another further aspect is risen by boosting unit 106
After pressure processing, output third predeterminated voltage signal is powered hard disk unit 110, and third predeterminated voltage signal is by the
The 4th predeterminated voltage signal of output is powered hard disk unit 110 after three pressure units 107 carry out decompression processing；
Single chip control unit 108 exports control instruction, charge/discharge unit 103 when detecting that vehicle power supply 201 powers off
For when vehicle power supply 201 powers off, electric discharge the first predeterminated voltage signal of output to be to maintain to single chip control unit 108, be
Unite control unit 109 and hard disk unit 110 is powered so that system control unit 109 according to control instruction within a preset time
Control hard disk unit 110 stores the data recorded in real time.
As an embodiment of the present invention, the voltage value of above-mentioned first predeterminated voltage signal is 12V, the second predeterminated voltage
The voltage value of signal is 3.3V, and the voltage value of third predeterminated voltage signal is 12.4V, and the voltage value of the 4th predeterminated voltage signal is
5V。
As an embodiment of the present invention, when being powered off due to vehicle power supply 201, in order to guarantee that data are not lost, because
This needs time enough not power off by hard disk unit 110, could store to the data recorded in real time.It is controlled in single-chip microcontroller
Unit 108 exports control instruction when detecting that vehicle power supply 201 powers off, then system control unit 109 exists according to control instruction
Control hard disk unit 110 stores the data recorded in real time in preset time.It is to be filled after the power-off of vehicle power supply 210
Discharge cell 103, which can discharge, guarantees that single chip control unit 108, system control unit 109 and hard disk unit 110 can continue again
Work a period of time.This time allows hard disk unit 110 to store the data recorded in real time enough.
Fig. 3 shows a kind of example electricity of power-off protecting circuit for mobile unit provided by the embodiment of the utility model
Road, for ease of description, only the parts related to this embodiment are shown, and details are as follows:
As an embodiment of the present invention, above-mentioned current limiting unit 102 includes current-limiting resistance.
As an embodiment of the present invention, above-mentioned voltage transformation unit 101 is realized using transformation chip U1.Due to vehicle power supply
The range of the voltage signal of 201 outputs is 8V~36V, and the voltage letter of output 12V after voltage conversion is carried out by transformation chip U1
Number.
As an embodiment of the present invention, above-mentioned first pressure unit 104, the second pressure unit 105 and third drop
Pressure unit 107 is all made of decompression chip and realizes.Specifically, the first decompression chip U2 and second that the first pressure unit 104 uses
The second decompression chip U3 that pressure unit 105 uses can be the decompression chip of same model, all be to be depressured the voltage signal of 12V
To be exported after the voltage signal of 3.3V, single chip control unit 108 and system control unit 109 are powered respectively；
The third decompression chip U4 that third pressure unit 107 uses is then the voltage signal being depressured the voltage signal of 12.4V as 5V, and
Hard disk unit 110 is powered.
As an embodiment of the present invention, above-mentioned boosting unit 106 is realized using boost chip U5, and boost chip U5 is used
It boosts in by the voltage signal of 12V as 12.4V, and hard disk unit 110 is powered.
As an embodiment of the present invention, above-mentioned charge/discharge unit 103 includes farad capacitor.
As an embodiment of the present invention, above-mentioned hard disk unit 110 includes 3.5 cun of hard disks or 2.5 cun of hard disks, Fig. 3
It is indicated using 3.5 cun of hard disks.
The utility model additionally provides a kind of power-off protection apparatus for mobile unit, including single chip control unit,
System control unit and hard disk unit, the power-off protection apparatus further include power-off protecting circuit as described above.
The utility model additionally provides a kind of circuit breaking protective system for mobile unit, including vehicle power supply, the power-off
Protection system further includes power-off protection apparatus as described above.
Below in conjunction with Fig. 2-Fig. 3 to the work of a kind of above-mentioned power-off protecting circuit for mobile unit, apparatus and system
It is illustrated as principle:
Vehicle power supply 201 powers on power supply process:
1) transformation chip U1 is responsible for carrying out buck processing to 201 input voltage of vehicle power supply: when input is lower than 12V, place
In boost mode；When output is higher than 12V, it is in decompression mode.Output is set as fixed 12V, is 12V's based on setting output
Reason is mainly that industry universal standard and Peripheral Interface are powered for 12V；
2) while transformation chip U1 exports 12V to back-end system power supply, farad capacitor is filled by current-limiting resistance
Electricity is in steady state after punching is full；
3) transformation chip U1 exports 12V, is respectively 3.3V by the first decompression chip U2 and the second decompression chip U3 decompression
After processing, power respectively to single chip control unit 108 and system control unit 109；
4) it is directed to transformation chip U5, circuit operating conditions input voltage range (3V-60V), output voltage setting exists
12.4V, for rear end hard disk 12V power supply power supply and third decompression chip U4 power supply；
5) it is depressured chip U4 for third, input provides 12.4V by transformation chip U5, and output voltage setting is used in 5V
Rear end hard disk 5V power supply power supply；
6) 12.4V is arranged in the boosting output valve of transformation chip U5, meets 3.5 cun of hard disk power work range 12V ± 10%,
Transformation chip U5 work can be allowed not influenced by dispatch from foreign news agency opening and closing simultaneously, be always maintained at stable boost mode.On i.e. normal
U1 exports 12V, transformation chip U5 boosting output 12.4V in the case where electricity operation.
201 power down process of vehicle power supply:
Single chip control unit 108 passes through the case where ADC pin real-time monitoring vehicle power supply 201, if continuous 600ms prison
It measures voltage and is then judged as powered-off fault lower than 7V, and system control unit 109 is notified to shut down and save data.System control is single
After member 109 receives the too low instruction (i.e. control instruction) of dispatch from foreign news agency of the sending of single chip control unit 108, shutdown mode is initially entered,
It saves data and unloads suspend mode hard disk.General completion data preservation needs 4s or so, i.e. whole system needs to be electrically turn off outside
In the case of, as long as power good maintains 4s or more it is ensured that hard disc data will not be lost.
System power good how is maintained, is showed as follows:
1) transformation chip U1 is in off position；
2) in whole system single chip control unit 108, system control unit 109,110 power supply of hard disk unit all by method
Capacitor 103 is drawn to be discharged since 12V to support；
3) during input is declined by 12V, output voltage is protected always by the first decompression chip U1, the second decompression chip U2
It keeps steady and continues to output 3.3V surely, until the tension discharge of farad capacitor 103 is lower than 3.3V；
4) boost chip U5 is in boost mode during input is declined by 12V always, declines process from 12V-3V
In the range of, boost chip U5 is not influenced to remain that pressure-increasning state exports stable 12.4V to 3.5 cun of hard disk works by dispatch from foreign news agency
Make, until the tension discharge of farad capacitor 103 is lower than the input threshold 3V of boost chip U5；
5) working condition of third decompression chip U4 is constant, outputs and inputs voltage as when normal upper electricity operation；
6) as known from the above, voltage of the voltage of farad capacitor 103 higher than 3.3V is just able to maintain stabilization, therefore farad capacitor
103 voltages slowly fall since 12V, and beginning to decline from 12V to 3.3V is effective voltage.Parameter is arranged in farad capacitor 103
For 3F, loading 3A according to the theoretical time that calculation formula 12V drops to 3.3V is (12V-3.3V) * 3F/3A=8.7S, i.e., effectively
Voltage time is 8.7S.Effective 8.7S voltage can guarantee that system control unit 109 controls the guarantor that 3.5 cun of hard disks complete data
It deposits.
Therefore, while above-mentioned power-off protecting circuit improves data and saves successfully, solve it is vehicle-mounted at present in the market
The problem of 3.5 cun of big hard disk failure data protections can not be supported.The power-off protecting circuit supports 2.5 cun of hard disks or 3.5 cun of hard disks；
Using the boosting characteristic of circuit, the power down range of farad capacitor is improved, has won more times for system to handle shutdown
Process, to greatly improve the reliability of hard disc data preservation；Its circuit is simple, reliable, stable, at low cost.
To sum up, a kind of power-off protecting circuit for mobile unit provided by the embodiment of the utility model, apparatus and system,
Control instruction is exported when detecting vehicle power supply power-off by single chip control unit, charge/discharge unit is used in vehicle power supply
When power-off, electric discharge the first predeterminated voltage signal of output is to maintain to single chip control unit, system control unit and hard disk list
Member power supply so that system control unit controlled within a preset time according to control instruction hard disk unit to the data recorded in real time into
Row storage.It is thus achieved that hard disk unit has time enough to deposit the data recorded in real time in vehicle power supply power-off
The problem of storing up, avoiding loss of data, solving the existing power-off protection technology for mobile unit, there is 3.5 cun of hard disks
Automobile data recorder because external power supply destroy in the case where, the problem of can not data be recorded and be stored in real time.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of power-off protecting circuit for mobile unit, which is characterized in that the power-off protecting circuit includes:
Voltage transformation unit, the first pressure unit, the second pressure unit, third pressure unit, current limiting unit, charge/discharge unit and liter
Press unit；
The input terminal of the voltage transformation unit connects vehicle power supply, and the output end of the voltage transformation unit is connect described by the current limiting unit
Charge/discharge unit, the input terminal and the boosting unit of the input terminal of first pressure unit, second pressure unit
Input terminal connect the current limiting unit respectively, the output end of first pressure unit connects single chip control unit, described second
On the one hand the output end of the output terminating systems control unit of pressure unit, the boosting unit connects hard disk unit, on the other hand
The hard disk unit is connect by the third pressure unit；
The voltage signal of the vehicle power supply output exports the first predeterminated voltage after the voltage transformation unit carries out voltage transformation
On the one hand signal, the first predeterminated voltage signal pass through the current limiting unit and charge to the charge/discharge unit；It is another
After aspect carries out decompression processing by first pressure unit and second pressure unit respectively, the second predeterminated voltage is exported
Signal is respectively powered the single chip control unit and the system control unit；Another further aspect is single by the boosting
After member carries out boosting processing, output third predeterminated voltage signal is powered the hard disk unit, and the third is default
Voltage signal exports the 4th predeterminated voltage signal to the hard disk unit after the third pressure unit carries out decompression processing
It is powered；
The single chip control unit exports control instruction when detecting vehicle power supply power-off, and the charge/discharge unit is used
In in vehicle power supply power-off, it is single to maintain to control the single-chip microcontroller that electric discharge exports the first predeterminated voltage signal
First, the described system control unit and hard disk unit power supply, so that the system control unit is according to the control instruction
The hard disk unit is controlled within a preset time to store the data recorded in real time.
2. power-off protecting circuit as described in claim 1, which is characterized in that the current limiting unit includes current-limiting resistance.
3. power-off protecting circuit as described in claim 1, which is characterized in that the voltage value of the first predeterminated voltage signal is
12V, the voltage value of the second predeterminated voltage signal are 3.3V, and the voltage value of the third predeterminated voltage signal is 12.4V, institute
The voltage value for stating the 4th predeterminated voltage signal is 5V.
4. power-off protecting circuit as described in claim 1, which is characterized in that the voltage transformation unit is realized using transformation chip.
5. power-off protecting circuit as described in claim 1, which is characterized in that first pressure unit, second decompression
Unit and the third pressure unit are all made of decompression chip and realize.
6. power-off protecting circuit as described in claim 1, which is characterized in that the boosting unit is realized using boost chip.
7. power-off protecting circuit as described in claim 1, which is characterized in that the charge/discharge unit includes farad capacitor.
8. power-off protecting circuit as described in claim 1, which is characterized in that the hard disk unit include 3.5 cun of hard disks or
2.5 cun of hard disks.
9. a kind of power-off protection apparatus for mobile unit, including single chip control unit, system control unit and hard disk
Unit, which is characterized in that the power-off protection apparatus further includes power-off protecting circuit as claimed in any one of claims 1 to 8.
10. a kind of circuit breaking protective system for mobile unit, including vehicle power supply, which is characterized in that the power-off protection system
System further includes power-off protection apparatus as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821779347.0U CN209258041U (en) | 2018-10-30 | 2018-10-30 | A kind of power-off protecting circuit for mobile unit, apparatus and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821779347.0U CN209258041U (en) | 2018-10-30 | 2018-10-30 | A kind of power-off protecting circuit for mobile unit, apparatus and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209258041U true CN209258041U (en) | 2019-08-16 |
Family
ID=67559370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821779347.0U Active CN209258041U (en) | 2018-10-30 | 2018-10-30 | A kind of power-off protecting circuit for mobile unit, apparatus and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209258041U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110490996A (en) * | 2019-08-27 | 2019-11-22 | 深圳市锐明技术股份有限公司 | A kind of data extraction circuit and vehicle applied to vehicle-mounted monitoring equipment |
| CN113721147A (en) * | 2021-07-12 | 2021-11-30 | 深圳市有为信息技术发展有限公司 | Vehicle-mounted terminal power failure detection control device, power failure rapid power consumption reduction system and method |
-
2018
- 2018-10-30 CN CN201821779347.0U patent/CN209258041U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110490996A (en) * | 2019-08-27 | 2019-11-22 | 深圳市锐明技术股份有限公司 | A kind of data extraction circuit and vehicle applied to vehicle-mounted monitoring equipment |
| CN113721147A (en) * | 2021-07-12 | 2021-11-30 | 深圳市有为信息技术发展有限公司 | Vehicle-mounted terminal power failure detection control device, power failure rapid power consumption reduction system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109564457A (en) | A kind of power-off protecting circuit for mobile unit, apparatus and system | |
| CN105468127B (en) | A kind of real-time data acquisition system and its power failure data storage circuit, method | |
| CN209258041U (en) | A kind of power-off protecting circuit for mobile unit, apparatus and system | |
| CN102004707A (en) | Power-fail protection method and device for solid state disk | |
| CN102156679A (en) | PCIE interface-based solid state disk power-down protection method and device | |
| CN101826060A (en) | Method and device for protecting power failure data of solid state disk | |
| CN104881375A (en) | Power-down data protection method and device of storage system | |
| US20060259795A1 (en) | Portable computer and data backup method thereof | |
| CN105807885A (en) | Power down protection method and device | |
| CN202771180U (en) | Programmable controller capable of saving when power goes off | |
| CN101702535A (en) | Power supply device and method | |
| CN106227623B (en) | A kind of file format and data power down restorative procedure and system based on intelligent terminal | |
| US20040243826A1 (en) | Computer data protection control device | |
| CN212343310U (en) | Protective device for vehicle-mounted electronic equipment and vehicle-mounted electronic equipment | |
| CN202887178U (en) | Electronic device capable of realizing power-off protection of hard disc | |
| CN202385194U (en) | System capable of quickly starting intelligent television | |
| US20100005252A1 (en) | Storage control system | |
| CN110138380B (en) | Power-down time monitoring circuit and method | |
| CN1293461C (en) | Method for suspending state of computer system | |
| CN102385897B (en) | Storage device and power supply method for storage device | |
| CN212486629U (en) | Power-off protection system for preventing data loss when camera power failure | |
| CN106412472A (en) | Vehicle-mounted video recorder hard disk protection method and apparatus | |
| CN107910034B (en) | Power-down protection circuit of Flash memory | |
| CN105375613A (en) | Capacitance matrix circuit | |
| CN203747497U (en) | Standby power supply switching device during power off |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |