CN106843188A - It is a kind of to predict the device and method that anti-systematic parameter is lost based on power supply status - Google Patents
It is a kind of to predict the device and method that anti-systematic parameter is lost based on power supply status Download PDFInfo
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- CN106843188A CN106843188A CN201510888108.3A CN201510888108A CN106843188A CN 106843188 A CN106843188 A CN 106843188A CN 201510888108 A CN201510888108 A CN 201510888108A CN 106843188 A CN106843188 A CN 106843188A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
- G05B23/0224—Process history based detection method, e.g. whereby history implies the availability of large amounts of data
- G05B23/0227—Qualitative history assessment, whereby the type of data acted upon, e.g. waveforms, images or patterns, is not relevant, e.g. rule based assessment; if-then decisions
- G05B23/0235—Qualitative history assessment, whereby the type of data acted upon, e.g. waveforms, images or patterns, is not relevant, e.g. rule based assessment; if-then decisions based on a comparison with predetermined threshold or range, e.g. "classical methods", carried out during normal operation; threshold adaptation or choice; when or how to compare with the threshold
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24075—Predict control element state changes, event changes
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Abstract
The invention discloses a kind of the device and method that anti-systematic parameter is lost is predicted based on power supply status, the device is connected with vehicular power-bottle input, including the vehicle-mounted power supply module for vehicular power-bottle input to be converted into processor MCU working powers, vehicle-mounted power supply module includes power filtering unit and DC-DC converting units；Vehicular power-bottle power state detection module and processor MCU for carrying out real-time monitoring to vehicular power-bottle power supply, processor MCU is additionally operable to interrupt protection, FLASH is erasable, data storage；The MCU working power boost modules of working power are provided for being boosted to input power and for processor MCU, for the first switch for controlling whether to be powered by vehicle-mounted power supply module, for the second switch for controlling whether to be powered by MCU working power boost modules, and flash storage medium.The present apparatus realizes the protection to system application parameter.
Description
Technical field
It is more particularly to a kind of to predict the device that anti-systematic parameter is lost based on power supply status the present invention relates to mobile unit technical field
And method.
Background technology
Small consumer class of electronic devices generally uses the non-volatile chip of the internal battery based on random access memory to realize preventing
The method that application system real-time parameter is lost, this kind of method writing speed is slower, erasable number of times is limited, only can be suitably used for data volume
Application field that is smaller and need not frequently writing into.
High-capacity and high-speed is needed to preserve the application of system real-time parameter repeatedly, it is necessary to prevent for on-board driving recorder all-in-one etc.
Processor is preserving systematic parameter, carries out in the erasable operating process of FLASH, and working power is abnormal to be caused to wipe wrong as power supply falls
Or Block is wrongly write, and cause file system of the storage in FLASH to be destroyed, cause the on-board driving recorder all-in-one cannot
Start.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, proposition is a kind of to predict what anti-systematic parameter was lost based on power supply status
Device and method, realizes on-board driving recorder all-in-one application system in the case of vehicular power-bottle abnormity of power supply, and system is answered
Protected with parameter, it is ensured that the Stability and dependability of system operation.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of to predict the device that anti-systematic parameter is lost based on power supply status, the device is connected with vehicular power-bottle input, including：
Vehicle-mounted power supply module, for vehicular power-bottle input to be converted into processor MCU working powers, the vehicle-mounted power supply module
Including power filtering unit and DC-DC converting units；
Vehicular power-bottle power state detection module, receives the output of the power filtering unit, and realization is carried out to vehicular power-bottle power supply
Real-time detection；
Processor MCU, coordinate with the vehicular power-bottle power state detection module carries out real-time monitoring to vehicular power-bottle power supply,
And carry out interruption control；
MCU working power boost modules, are boosted for the output to the DC-DC converting units and are processor
MCU provides normal work power supply；
First switch, for controlling whether to be powered by the vehicle-mounted power supply module；
Second switch, for controlling whether to be powered by the MCU working powers boost module；
Flash storage medium, for preserving systematic parameter；
The vehicular power-bottle input is connected with the input of the power filtering unit, the output end difference of the power filtering unit
Input, vehicular power-bottle power state detection module input with the DC-DC converting units are connected, the DC-DC
The output end of converting unit first end, the first end of first switch company respectively with the MCU working powers boost module
Connect, the 3rd end of the MCU working powers boost module is connected with the first end of the second switch, the first switch
3rd end is connected with the first end of the processor MCU, the 3rd end of the second switch and the of the processor MCU
Two ends connect, the three-terminal link of the output end of the vehicular power-bottle power state detection module and the processor MCU, institute
The 4th end for stating processor MCU is connected with the input of the flash storage medium, the 5th end of the processor MCU
It is connected with the second end of the first switch, the 6th end of the processor MCU is boosted with the MCU working powers respectively
The second end connection at second end, the second switch of module.
The vehicular power-bottle power supply status monitoring modular includes first resistor, second resistance, 3rd resistor, the 4th resistance, first
Electric capacity, the second electric capacity and operational amplifier, the first resistor are connected to the power filtering unit after being connected with second resistance
Between output end and ground, the second end of the first resistor, the first end of second resistance are in the same direction with the operational amplifier respectively
Input is connected, operational amplifier output terminal reverse input end, the first of the 3rd resistor respectively with operational amplifier
End connection, the end of the 3rd resistor second is placed in ground after the 4th resistance, first electric capacity, second electric capacity parallel connection
Between, the second end of the 3rd resistor and the processor MCU three-terminal links.
The MCU working powers boost module includes the first inductance, the 3rd electric capacity, the 4th electric capacity and stepup transformer, the boosting
The Vin ends of device output end respectively with the DC-DC converting units, the first end of the 3rd electric capacity are connected, the boosting
The six end connecting of the EN ends of device and the processor MCU, first inductance connection in the L1 ends of the stepup transformer with
Between L2 ends, the Vout ends of the stepup transformer be connected with FB ends after respectively with first end, described second of the 4th electric capacity
Switch first end connection, second end of the 3rd electric capacity, second end of the 4th electric capacity, the GND ends of the stepup transformer connect
Ground.
The first switch, the second switch are transistor or relay switch.
It is a kind of to predict the method that anti-systematic parameter is lost based on power supply status, including such as any claim in Claims 1-4
Described predicts the device that anti-systematic parameter is lost based on power supply status, and method is as follows：
1) vehicular power-bottle power supply status monitoring modular coordinates the real-time monitoring for realizing vehicular power-bottle power supply with processor MCU, when
When vehicular power-bottle power supply is less than predetermined threshold value, processor MCU produces quick-speed interruption；
2) processor MCU runtimes real-time parameter protection interrupt routine；
3) first switch disconnects, second switch closure, the electricity that MCU working powers boost module is provided vehicle-mounted power supply module
Boosted in source, it is ensured that the stabilization of processor MCU power supplies；
4) after vehicular power-bottle power supply meets predetermined threshold value, processor MCU log off real-time parameter protection interrupt routine；
5) MCU working power boost modules are closed, second switch disconnects, first switch closure, the electricity of vehicle-mounted power supply module
Source exports and is powered to processor MCU.
The step of system real-time parameter protection interrupt routine, includes：
1) vehicle-mounted battery power is monitored；
2) when vehicular power-bottle power supply is less than predetermined threshold value, processor MCU stops carrying out erasable operation to FLASH immediately,
The control signal that MCU working powers boost module enables signal and second switch is set to high level, by the control of first switch
Signal is set to low level, and system real-time parameter is stored into the non-volatile memory medium to processor MCU；
3) when vehicular power-bottle power supply is higher than predetermined threshold value, the control signal of first switch is set to high level by processor MCU,
The control signal that MCU working powers boost module enables signal and second switch is set to low level, processor MCU will be non-
File in volatile storage medium takes out, and carries out the erasable operations of FLASH, realizes data protection with storage.
The beneficial effect brought of technical scheme that the present invention is provided is：Realize the all-in-one application system such as on-board driving recorder in car
In the case of carrying battery power exception, system application parameter is protected, it is ensured that the Stability and dependability of system operation.
The present invention is described in further detail below in conjunction with drawings and Examples, but it is of the invention a kind of based on power supply status prediction
The device and method that anti-systematic parameter is lost is not limited to embodiment.
Brief description of the drawings
Fig. 1 is the structured flowchart of apparatus of the present invention；
Fig. 2 is apparatus of the present invention vehicular power-bottle power supply status monitoring modular circuit；
Fig. 3 is the circuit of apparatus of the present invention MCU working power boost modules；
Fig. 4 is that flow chart is interrupted in system real-time parameter of the invention protection.
Specific embodiment
It is of the invention a kind of to predict the device that anti-systematic parameter is lost, the device and vehicular power-bottle based on power supply status referring to Fig. 1
Input connection, including：
Vehicle-mounted power supply module 1, the vehicle-mounted power supply module 1 includes power filtering unit 11 and DC-DC converting units 12；
Vehicular power-bottle power state detection module 2；Processor MCU 3；MCU working powers boost module 4；First switch 5；The
Two switches 6；Flash storage medium 7.
Specifically, each functions of modules is as follows：
Vehicle-mounted power supply module, receives vehicular power-bottle input, for vehicular power-bottle input to be converted into processor MCU working powers
, the vehicle-mounted power supply module includes power filtering unit and DC-DC converting units；
Vehicular power-bottle power state detection module, receives the output of power filtering unit, and realization is carried out in real time to vehicular power-bottle power supply
Detection；
Processor MCU, coordinate with vehicular power-bottle power state detection module carries out real-time monitoring to vehicular power-bottle power supply, goes forward side by side
Row interrupts control；
MCU working power boost modules, receive the output of DC-DC converting units, are operated by processor MCU, are used for
Output to DC-DC converting units is boosted and for processor MCU provides normal work power supply；
Flash storage medium, preserves systematic parameter, is operated by processor MCU；
First switch, is connected between the DC-DC converting units and the processor MCU, by processor MCU's
Operation, for controlling whether to be powered by vehicle-mounted power supply module；
Second switch, is connected between the MCU working powers boost module and the processor MCU, by processor
The operation of MCU, for controlling whether to be powered by car MCU working power boost modules.
Specifically, the vehicular power-bottle input is connected with the input of the power filtering unit 11, the power filtering unit
11 output end input respectively with the DC-DC converting units 12, vehicular power-bottle power state detection module 2 are input into
End connection, the output end of the DC-DC converting units 12 respectively with the input of the MCU working powers boost module 4
1st, the input 1 of the first switch 5 is connected, the output end 3 of the MCU working powers boost module 4 and described
The input 1 of two switches 6 is connected, and the output end 3 of the first switch 5 connects with the input 1 of the processor MCU 3
Connect, the output end 3 of the second switch 6 is connected with the input 2 of the processor MCU 3, the vehicular power-bottle power supply
The output end of state detection module 2 is connected with the input 3 of the processor MCU 3, the output of the processor MCU 3
End 4 is connected with the input of the flash storage medium 7, and the output end 5 of the processor MCU 3 is opened with described first
The input 2 for closing 5 is connected, the output end 6 of the processor MCU 3 respectively with the MCU working powers boost module 4
Input 2, the input 2 of the second switch 6 connects.
Specifically, GPIO1 is defined as the control signal of the output ends 5 of processor MCU 3, GPIO2 is defined as processor MCU
The control signal of 3 output ends 6, vehicular power-bottle power supply is defined as to the power supply after vehicular power-bottle input filter, i.e. vehicular power-bottle electricity
The input power of source state detection module 2, after processor MCU working powers are defined as being depressured through DC-DC converting units 12
Power supply, first switch turn on when, be processor MCU 3 provide working power, first switch disconnect when, as MCU
The input power of working power boost module 4, MCU AD sampling power supplys are defined as vehicular power-bottle power state detection module 2
Out-put supply, as the input of AD conversion module in processor MCU 3.
In the present embodiment, the vehicular power-bottle input is after vehicle-mounted power supply module 1 is processed for processor MCU 3 is provided normally
Working power 3.3V, it is 2.97V-3.63V that processor MCU 3 recommends power work scope, it is preferred that processor MCU
It is 6V that 3 preferred car rule level processor PX2, DC-DC voltage reduction modules allow minimum input voltage.
Specifically, the analog-to-digital conversion module of the vehicular power-bottle power supply status monitoring modular 2 and processor MCU 3 is to vehicle mounted electric
Bottle power supply carries out real-time monitoring.As shown in Fig. 2 the vehicular power-bottle power supply status monitoring modular 2 include first resistor R1,
Second resistance R2,3rd resistor R3, the 4th resistance R4, the first electric capacity C1, the second electric capacity C2 and operational amplifier A 1,
Second end of the first resistor R1, the first end of second resistance R2 respectively with the input in the same direction of the operational amplifier A 1
Connection, the first resistor R1 is connected to the output end and ground of the power filtering unit 11 after being connected with second resistance R2
Between, the output end of the operational amplifier A 1 reverse input end respectively with operational amplifier A 1, the 3rd resistor R3
First end is connected, and described the is connected to after the 4th resistance R4, the first electric capacity C1, the second electric capacity C2 parallel connections
Between three the second ends of resistance R3 and ground, second end of the 3rd resistor R3 connects with the inputs of processor MCU 3 the 3rd
Connect.
Resistance R1 and R2 carries out partial pressure, the input overvoltage of limitation operational amplifier A 1, operational amplifier to vehicular power-bottle power supply
A1 plays a part of to increase input impedance, it is ensured that the accuracy of analog-to-digital conversion AD samplings, resistance R3 and R4 is carried out to power supply
Second divided voltage, it is ensured that the voltage 3.3V that AD passage of the input power less than processor MCU 3 is born.
In the present embodiment, it is U to make vehicular power-bottle power supplyi, the analog-to-digital conversion module AD precision of processor MCU 3 is 10,
Analog-to-digital conversion module AD inputs sampling power supply U0Computing formula is as follows：
The corresponding digital quantity of analog-to-digital conversion module AD input analog quantitys is 210*U0。
Vehicle repeats acceleration and deceleration, and engine speed is fluctuated, vehicular power-bottle will be caused to fluctuate widely, as processor MCU 3
The vehicular power-bottle power supply of analog-to-digital conversion module AD samplings is less than predetermined threshold value 6V (onboard power system DC-DC converting units
The 12 minimum operating voltages for allowing), processor produces quick-speed interruption, and the control signal GPIO1 of first switch 5 is set into low electricity
Flat 0V, stepup transformer U1 enable EN ends and the control signal GPIO2 of second switch 6 is set to high level 3.3V, now, the
One switch 5 is disconnected, and second switch 6 is closed, and MCU working powers boost module 4 is that processor MCU 3 provides working power.
As shown in figure 3, specifically, the MCU working powers boost module 4 include the first inductance L1, the 3rd electric capacity C3,
The Vin ends of the 4th electric capacity C4 and stepup transformer U1, the stepup transformer U1 respectively with the output of the DC-DC converting units 12
End, the first end connection of the 3rd electric capacity C3, the EN ends of the stepup transformer U1 and the output end 6 of processor MCU 3
Connection, the first inductance L1 is connected between the L1 ends of the stepup transformer U1, L2 ends, the stepup transformer U1
Vout ends be connected with FB ends after first end respectively with the 4th electric capacity C4, the first input end of the second switch 6 connect
Connect, second ends of the 3rd electric capacity C3, second ends of the 4th electric capacity C4, the GND ends of the stepup transformer U1 are grounded.
Specifically, the 3rd electric capacity C3 is input filtering electric capacity, the 4th electric capacity C4 is output end filter capacitor.
Preferably, the stepup transformer U1 may be selected TPS63021, and its input Vin working ranges are 1.8-5.5V, output end vo ut
It is fixed output 3.3V, the control signal GPIO2 that EN ends connect processor MCU 3 is enabled, when processor MCU's 3
GPIO2 is set to high level 3.3V, and second switch 6 is closed, and stepup transformer U1 is working condition, and its input power is boosted,
Its output end vo ut connects second switch 6 for processor MCU provides 3.3V working powers, it is ensured that processor working power
Stabilization.
The present invention also provides a kind of method that anti-systematic parameter loss is predicted based on power supply status, including device as described above, should
Method includes：
1) vehicular power-bottle power supply status monitoring modular coordinates the real-time monitoring for realizing vehicular power-bottle power supply with processor MCU, when
When vehicular power-bottle power supply is less than predetermined threshold value, processor MCU produces quick-speed interruption；
2) processor MCU runtimes real-time parameter protection interrupt routine；
3) first switch disconnects, second switch closure, the electricity that MCU working powers boost module is provided vehicle-mounted power supply module
Boosted in source, it is ensured that the stabilization of processor MCU power supplies；
4) after vehicular power-bottle power supply meets predetermined threshold value, processor MCU log off real-time parameter protection interrupt routine；
5) MCU working power boost modules are closed, second switch disconnects, first switch closure, the electricity of vehicle-mounted power supply module
Source exports and is powered to processor MCU.
As shown in figure 4, in the present embodiment, the system real-time parameter protection interrupt routine specific steps include：
Step S401：Monitor vehicle-mounted battery power；
Step S402：Judge vehicular power-bottle power supply whether less than predetermined threshold value；
Specifically, when vehicular power-bottle power supply is less than predetermined threshold value 6V, into step S403, otherwise into step S406；
Step S403：Processor MCU stops carrying out erasable operation to FLASH immediately；
Step S404：GPIO1 is set to low level, and GPIO2 is set to high level；
Specifically, the control signal GPIO2 that MCU working powers boost module enables signal and second switch is set into electricity high
It is flat, the control signal GPIO1 of first switch is set to low level.
Step S405：Storage system parameter；
Specifically, system real-time parameter is preserved with bin formatted files, storage location is non-easy inside processor MCU
The property lost storage medium.After the completion of the step is performed, return to step S401.
Step S406：Judge whether GPIO2 is high level；
If specifically, GPIO2 is high level, performing step S407；If GPIO2 is low level, return to step S401.
Step S407：GPIO1 is set to high level, and GPIO2 is set to low level；
Specifically, the control signal of first switch is set to high level by processor MCU, by MCU working power boost modules
The control signal for enabling signal and second switch is set to low level.
Step S408：Flash is erasable, data storage；
Specifically, processor MCU takes out the bin formatted files in non-volatile memory medium, FLASH is carried out erasable
Operation, realizes data protection with storage.After the completion of the step is performed, return to step S401.
The beneficial effect brought of technical scheme that the present invention is provided is：Realize the all-in-one application system such as on-board driving recorder in car
In the case of carrying battery power exception, system application parameter is protected, it is ensured that the Stability and dependability of system operation.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in the spirit and principles in the present invention
Within, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (6)
1. a kind of to predict the device that anti-systematic parameter is lost based on power supply status, the device is connected with vehicular power-bottle input, and it is special
Levy and be, including：
Vehicle-mounted power supply module, for vehicular power-bottle input to be converted into processor MCU working powers, the vehicle-mounted power supply module
Including power filtering unit and DC-DC converting units；
Vehicular power-bottle power state detection module, receives the output of the power filtering unit, and realization is carried out to vehicular power-bottle power supply
Real-time detection；
Processor MCU, coordinate with the vehicular power-bottle power state detection module carries out real-time monitoring to vehicular power-bottle power supply,
And carry out interruption control；
MCU working power boost modules, are boosted for the output to the DC-DC converting units and are processor
MCU provides normal work power supply；
First switch, for controlling whether to be powered by the vehicle-mounted power supply module；
Second switch, for controlling whether to be powered by the MCU working powers boost module；
Flash storage medium, for preserving systematic parameter；
The vehicular power-bottle input is connected with the input of the power filtering unit, the output end difference of the power filtering unit
Input, vehicular power-bottle power state detection module input with the DC-DC converting units are connected, the DC-DC
The output end of converting unit first end, the first end of first switch company respectively with the MCU working powers boost module
Connect, the 3rd end of the MCU working powers boost module is connected with the first end of the second switch, the first switch
3rd end is connected with the first end of the processor MCU, the 3rd end of the second switch and the of the processor MCU
Two ends connect, the three-terminal link of the output end of the vehicular power-bottle power state detection module and the processor MCU, institute
The 4th end for stating processor MCU is connected with the input of the flash storage medium, the 5th end of the processor MCU
It is connected with the second end of the first switch, the 6th end of the processor MCU is boosted with the MCU working powers respectively
The second end connection at second end, the second switch of module.
It is 2. according to claim 1 to predict the device that anti-systematic parameter is lost based on power supply status, it is characterised in that：
The vehicular power-bottle power supply status monitoring modular includes first resistor, second resistance, 3rd resistor, the 4th resistance, first
Electric capacity, the second electric capacity and operational amplifier, the first resistor are connected to the power filtering unit after being connected with second resistance
Between output end and ground, the second end of the first resistor, the first end of second resistance are in the same direction with the operational amplifier respectively
Input is connected, operational amplifier output terminal reverse input end, the first of the 3rd resistor respectively with operational amplifier
End connection, the end of the 3rd resistor second is placed in ground after the 4th resistance, first electric capacity, second electric capacity parallel connection
Between, the second end of the 3rd resistor and the processor MCU three-terminal links.
It is 3. according to claim 1 to predict the device that anti-systematic parameter is lost based on power supply status, it is characterised in that：
The MCU working powers boost module includes the first inductance, the 3rd electric capacity, the 4th electric capacity and stepup transformer, the boosting
The Vin ends of device output end respectively with the DC-DC converting units, the first end of the 3rd electric capacity are connected, the boosting
The six end connecting of the EN ends of device and the processor MCU, first inductance connection in the L1 ends of the stepup transformer with
Between L2 ends, the Vout ends of the stepup transformer be connected with FB ends after respectively with first end, described second of the 4th electric capacity
Switch first end connection, second end of the 3rd electric capacity, second end of the 4th electric capacity, the GND ends of the stepup transformer connect
Ground.
It is 4. according to claim 1 to predict the device that anti-systematic parameter is lost based on power supply status, it is characterised in that：
The first switch, the second switch are transistor or relay switch.
5. it is a kind of to predict the method that anti-systematic parameter is lost based on power supply status, it is characterised in that including such as claim 1 to
The device that anti-systematic parameter is lost is predicted based on power supply status described in any claim in 4, method is as follows：
1) vehicular power-bottle power supply status monitoring modular coordinates the real-time monitoring for realizing vehicular power-bottle power supply with processor MCU, when
When vehicular power-bottle power supply is less than predetermined threshold value, processor MCU produces quick-speed interruption；
2) processor MCU runtimes real-time parameter protection interrupt routine；
3) first switch disconnects, second switch closure, the electricity that MCU working powers boost module is provided vehicle-mounted power supply module
Boosted in source, it is ensured that the stabilization of processor MCU power supplies；
4) after vehicular power-bottle power supply meets predetermined threshold value, processor MCU log off real-time parameter protection interrupt routine；
5) MCU working power boost modules are closed, second switch disconnects, first switch closure, the electricity of vehicle-mounted power supply module
Source exports and is powered to processor MCU.
6. it is according to claim 5 to predict the method that anti-systematic parameter is lost based on power supply status, it is characterised in that institute
The step of stating system real-time parameter protection interrupt routine includes：
1) vehicle-mounted battery power is monitored；
2) when vehicular power-bottle power supply is less than predetermined threshold value, processor MCU stops carrying out erasable operation to FLASH immediately,
The control signal that MCU working powers boost module enables signal and second switch is set to high level, by the control of first switch
Signal is set to low level, and system real-time parameter is stored into the non-volatile memory medium to processor MCU；
3) when vehicular power-bottle power supply is higher than predetermined threshold value, the control signal of first switch is set to high level by processor MCU,
The control signal that MCU working powers boost module enables signal and second switch is set to low level, processor MCU will be non-
File in volatile storage medium takes out, and carries out the erasable operations of FLASH, realizes data protection with storage.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389301A (en) * | 2019-08-06 | 2019-10-29 | 宁波吉欧光电科技有限公司 | A kind of vehicle power supply monitoring device |
| CN111614329A (en) * | 2020-05-11 | 2020-09-01 | 维沃移动通信有限公司 | Power amplifier, electronic equipment, voltage control method and device |
| CN111900791A (en) * | 2020-08-11 | 2020-11-06 | 上海道麒实业发展有限公司 | On-vehicle outage holding circuit |
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| CN111614329A (en) * | 2020-05-11 | 2020-09-01 | 维沃移动通信有限公司 | Power amplifier, electronic equipment, voltage control method and device |
| CN111614329B (en) * | 2020-05-11 | 2024-04-19 | 维沃移动通信有限公司 | Power amplifier, electronic equipment, voltage control method and device |
| CN111900791A (en) * | 2020-08-11 | 2020-11-06 | 上海道麒实业发展有限公司 | On-vehicle outage holding circuit |
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Application publication date: 20170613 |