CN102642472A - Method and device for power management and deadlock protective control of vehicle-mounted positioning and tracking equipment - Google Patents
Method and device for power management and deadlock protective control of vehicle-mounted positioning and tracking equipment Download PDFInfo
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Abstract
The invention relates to a method and a device for the power management and deadlock protective control of vehicle-mounted positioning and tracking equipment. The method comprises the following steps of: (1) carrying out boot initialization; (2) carrying out initial power-on delay, and switching on a DC-DC (Direct Current to Direct Current) circuit and all channels of LDO (Low Drop Out) of a singlechip microcomputer after the delay; (3) waiting for watchdog pulses; (4) switching on a watchdog after an MCU (Micro Controller Unit) receives the watchdog pulses; and (5) judging whether the watchdog is normal or not, executing a step (10) if the watchdog is normal, and executing a step (6) and the like if the watchdog is not normal. The device comprises the MCU, a first comparator, a second comparator, a first voltage sampling circuit, a power pre-stage protection circuit, the DC-DC circuit, a charging management circuit, an internal battery, a second voltage sampling circuit, a first LDO, a second LDO, a third LDO and a communication module. Compared with the prior art, the method and the device have the advantages of clear structure, capability of programming watchdog time, suitability for slow start circuits, automatic switch of the internal battery and an external battery, prolongation in depletion time of the internal battery.
Description
Technical field
The present invention relates to a kind of vehicle positioning tracing equipment, especially relate to a kind of power management and anti-deadlock control method and device of vehicle positioning tracing equipment.
Background technology
Vehicle location follow-up service end product; Usually adopt GPS technology, the communication technology for example GSM, CDMA, 3G etc. and microprocessor (MCU, ARM7, ARM9 etc.); The basic function of major product is suitable; All comprise vehicle location, functions such as anti-theft and anti-robbing warning, vehicle oil-break power break, display scheduling information.
Existing product engineering state is following:
1) the electrical equipment overall structure is power supply, GPS module, GSM, microprocessor and universal I, analog input etc. usually;
2) the corresponding DC-DC circuit that adopts, vehicle-mounted power supply 9V is to 36V
3) use ADC to detect outer power voltage, use host CPU control DC-DC circuit to open and close, thereby realize the switching of external power supply and internal cell;
4) use hardware watchdog Circuit management host CPU running state of programs, when program crashes, restart host CPU.
5) adopt host CPU, GPS module, communication module etc. on the circuit framework usually, adopt the order that powers up of host CPU management GPS module and communication module.
Its shortcoming is:
1) if the CPU that uses communication module when vehicle location follow-up service end product during as the CPU of application program; If application program takes place to crash; Because communication module is long run up time; If cause application program can't be in time to feed hardware watchdog, communication module will be by the hardware watchdog frequent recovery, thereby causes the terminal to start shooting;
2) can't realize software control the opening time of house dog;
3) lack final terminal internal cell management, when running down of battery automatically behind the shutdown mold closing piece, if there is not human intervention, communication module is automatically actuated problem during power up externally.
Summary of the invention
The object of the invention is exactly for the defective that overcomes above-mentioned prior art existence a kind of clear in structure, programmable watchdog time, adaptation slow start circuit to be provided, and the internal-external battery automaticallyes switch and prolongs power management and anti-deadlock control method and the device that internal cell exhausts the vehicle positioning tracing equipment of time.
The object of the invention can be realized through following technical scheme:
A kind of power management of vehicle positioning tracing equipment and anti-deadlock control method is characterized in that, may further comprise the steps:
1) opening initialization;
2) go up electric delay for the first time, postpone the back micro controller system and open DC-DC circuit and Ge Lu LDO (low pressure difference linear voltage regulator);
3) wait for watchdog pulse;
4) after MCU receives watchdog pulse, open house dog;
5) judge whether house dog is normal, if yes, execution in step 10), if not, execution in step 6);
6) crash and restart;
Close the first, the 3rd LDO;
8) wait for setting-up time;
9) open the first, the 3rd LDO, and return step 2);
10) whether first comparator detection exterior vehicle power supply sampling voltage is lower than the micro controller system power supply voltage, if yes, execution in step 14), if not, execution in step 11);
11) judge whether the DC-DC circuit is opened, and if yes, returns step 5), if not, execution in step 12);
12) micro controller system is opened the DC-DC circuit;
13) micro controller system is opened a LDO, the 3rd LDO;
14) judge whether the time length that exterior vehicle power supply sampling voltage is lower than the micro controller system power supply voltage reaches setting-up time, if yes, execution in step 15), if not, return step 5);
15) micro controller system is closed the DC-DC circuit;
16) second comparator judges whether inner lithium battery source sampling voltage is lower than the micro controller system power supply voltage, if yes, and execution in step 17), if not, return step 10);
17) judge whether the time length that inner lithium battery source sampling voltage is lower than the micro controller system power supply voltage reaches setting-up time, if yes, execution in step 18), if not, return step 5);
18) close a LDO, the 3rd LDO, and close house dog, return step 5).
A kind of power management of vehicle positioning tracing equipment and anti-deadlock control setup; It is characterized in that; Comprise MCU, first comparator, second comparator, first voltage sample circuit, power supply prime protective circuit, DC-DC circuit, charge management circuit, internal cell, second voltage sample circuit, a LDO, the 2nd LDO, the 3rd LDO, communication module; Described power supply prime protective circuit is connected with first comparator through first voltage sample circuit; Described MCU is connected with first comparator, second comparator, DC-DC circuit, a LDO, the 2nd LDO, the 3rd LDO, communication module respectively; Described power supply prime protective circuit is connected with the DC-DC circuit; Described DC-DC circuit is connected with charge management circuit; Connect in twos between described charge management circuit, internal cell, second voltage sample circuit, a LDO, the 2nd LDO, the 3rd LDO, described communication module is connected with charge management circuit, a LDO respectively, and described second voltage sample circuit is connected with second comparator.
Described DC-DC circuit is converted into the circuit of 5V DC for 9-36V DC.
A described LDO, the 3rd LDO are the LDO that band turn-offs control.
Described MCU is 8 micro controller systems of NXP.
Through the first voltage comparator state-detection, MCU control DC-DC closes and opens, and realizes that external electric is battery-powered to close and open.
Through the second voltage comparator state-detection, MCU controls closing and opening of a LDO, the 3rd LDO, realizes that internal electrical is battery-powered to close and open.
Compared with prior art, the present invention has the following advantages:
1) clear in structure, programmable watchdog time, adaptation slow start circuit, internal-external battery automatically switch and prolong internal cell and exhaust the time;
2), thereby satisfy the requirement to the management that powers on such as the equipment that starts communication module slowly with the chip microcontroller programmable watchdog time;
3) whether the slow starting outfit of adaptive judgement powers on for the first time, thereby avoids owing to slow starting outfit can not normally be fed the logic conflict that dog brings between the starting period;
4) through first comparator, detect outside vehicle-mounted voltage and whether satisfy the assigned voltage value, period of service and number of times are united judgement and are confirmed the externally fed magnitude of voltage, thereby avoid outside internal cell frequently to switch;
5) through second comparator, confirm the magnitude of voltage of internal cell, period of service and number of times are united judgement and are confirmed the internal supply voltage value, thereby avoid the error cut-off machine of communication module;
6) power supply that can the communication close module (milliampere level electric current), and only keep watchdog circuit power supply (microampere order), delayed the running down of battery time greatly;
7) even running down of battery externally during service restoration, also can start the terminal power supply.
Description of drawings
Fig. 1 is a diagram of circuit of the present invention;
Fig. 2 is a hardware configuration scheme drawing of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
Embodiment
As shown in Figure 1, a kind of power management of vehicle positioning tracing equipment and anti-deadlock control method may further comprise the steps:
After step 104, MCU receive watchdog pulse, open house dog;
The object of the invention provides a kind of power management and anti-deadlock control method and device of vehicle positioning tracing equipment; Support the seamless switching of outside vehicle power and internal cell; And adapt to the power supply management of slow start-up time equipment and the watchdog circuit of programmable time, prevent that software from crashing.
Module of the present invention realizes that outside conventional power source management and the watchdog function, the invention special feature is:
1) with the chip microcontroller programmable house dog time, thereby satisfy slow starting outfit, for example equipment such as communication module is to the requirement of the management that powers on; The watchdog pulse high-low level changes 5 seconds once, can program setting.
2) whether the slow starting outfit that need control of adaptive judgement powers on for the first time; When initially powering on; After the time of programmable, restart the house dog management program, thereby avoid owing to slow starting outfit can not normally be fed the logic conflict that dog brings between the starting period;
3) through first comparator, detect outside vehicle-mounted voltage and whether satisfy the assigned voltage value, the period of service length standard is judged affirmation externally fed magnitude of voltage and is avoided outside internal cell frequently to switch;
4) through second comparator, confirm the magnitude of voltage of internal cell, the period of service length standard is judged the error cut-off machine of confirming the internal supply voltage value and avoiding equipment;
5) can close slow starting outfit, the for example power supply of communication module (milliampere level electric current), and only keep watchdog circuit power supply (microampere order), thus delayed the running down of battery time greatly;
6) though the watchdog circuit that micro controller system is made in the device interior running down of battery automatically after the shutdown, externally during service restoration, also recovering terminal is supplied power automatically.
As shown in Figure 2; A kind of power management of vehicle positioning tracing equipment and anti-deadlock control setup; Comprise MCU1, first comparator 2, second comparator 3, first voltage sample circuit 4, power supply prime protective circuit 5, DC-DC circuit 6, charge management circuit 7, internal cell 8, second voltage sample circuit 9, a LDO10, the 2nd LDO11, the 3rd LDO12, communication module 13; Described power supply prime protective circuit 5 is connected with first comparator 2 through first voltage sample circuit 4; Described MCU1 is connected with first comparator 2, second comparator 3, DC-DC circuit 6, a LDO10, the 2nd LDO11, the 3rd LDO12, communication module 13 respectively; Described power supply prime protective circuit 5 is connected with DC-DC circuit 6; Described DC-DC circuit 6 is connected with charge management circuit 7; Connect in twos between described charge management circuit 7, internal cell 8, second voltage sample circuit 9, a LDO10, the 2nd LDO11, the 3rd LDO12, described communication module 13 is connected with charge management circuit 7, a LDO10 respectively, and described second voltage sample circuit 9 is connected with second comparator 3.
Wherein the function of each assembly is following:
1) power supply prime protective circuit 5 guarantees that the DC-DC power supply adapts to the recoil of vehicle power supply, overcurrent etc.; Input voltage range 9V-36VDC;
2) the DC-DC circuit 6: vehicle power is converted into the final terminal power requirement magnitude of voltage of internal request, can be set by circuit, 5V is each parts general supply of complete machine inside usually; This DC-DC circuit 6 is controlled by MCU, and when externally cell pressure was lower than thresholding, DC-DC circuit 6 was closed;
3) charge management circuit 7: from the 6 output power takings of DC-DC circuit, internal cell 8 is carried out Charge Management and for communication module 13 general supply is provided;
4) cell pressure sampling circuit: be made up of bleeder circuit, the different protection magnitude of voltage is divided into corresponding threshold voltage;
5) battery voltage detection circuit: constitute by the two-way comparator; Battery sampling voltage and MCU power supply voltage are compared, be lower than the MCU power supply voltage, comparator output low level, otherwise output high level if be checked through exterior vehicle power supply sampling voltage;
6) linear voltage-stabilizing circuit: a LDO10 and the 3rd LDO12 have the control end of enabling, and accept the output of outward sign control voltage and perhaps close.The one LDO10 gives communication module VBB power supply; The 3rd LDO12 gives other circuit supplies in the circuit.The 2nd LDO11 is used for the power supply to MCU, and the 2nd LDO11 output voltage is as the datum of comparator simultaneously.
7) MCU: adopt single chip microcomputer, operation terminal power management and the software management software that do not crash.Function is following:
Be lower than the micro controller system power supply voltage if be checked through exterior vehicle power supply sampling voltage, when the programming specified time reached with time number average, micro controller system was closed the DC-DC circuit, stopped this machine and used Vehicle Power;
Be higher than the micro controller system power supply voltage if be checked through exterior vehicle power supply sampling voltage, when the programming specified time reached with time number average, micro controller system was opened the DC-DC circuit, recovered to use the external cell power supply.
Be lower than the micro controller system power supply voltage if be checked through inner lithium battery source sampling voltage, when the programming specified time reached with time number average, micro controller system was closed external interface circuit LDO and communication module baseband circuit LDO, stops entire equipment work;
Be higher than the micro controller system power supply voltage if be checked through inner lithium battery source sampling voltage, when the programming specified time reached with time number average, micro controller system was opened external interface circuit LDO and communication module baseband circuit LDO, recovered entire equipment work;
If the equipment that is checked through powers on for the first time, micro controller system is opened DC-DC and each road LDO, behind the wait time that powers on of waiting for programmed settings, opens the watchdog microcontroller function again;
If micro controller system can not can be received the Watch Dog signal of host CPU at the programming specific time, micro controller system is closed the DC-DC circuit, to opening the DC-DC circuit after the system cut-off programmed settings time again, the whole terminal system is accomplished outage start.
Adopt multichannel band control LDO to realize that multichannel supplies power respectively: to comprise to the power supply of communication facilities base band, to the peripheral interface equipment power supply, to the power supply of micro controller system.LDO output stable voltage is selected by concrete application.
The composition of each assembly is following:
1, use resettable fuse, pizo-resistance, stabilivolt, triode and the IRF6116 of IRF company rectifier to accomplish power supply prime protective circuit 5;
2, use DC-DC circuit (TI company's T PS5430 chip), the DC9V-36V vehicle power is transformed the 5V power supply supply terminal inner to use;
3, connect the 5V power supply of DC-DC circuit output, charge management circuit (selecting GS1405 for use) carries out Charge Management to the 3.7V lithium cell, and this charge circuit output supplies to connect communication module VBAT input;
4, the LDO (5V-3.0V) that uses 2 bands to turn-off control gives the power supply of external circuit and communication module baseband portion respectively;
5, independently LDO (5V-3.3V) is to the MCU power supply to use 1, and this 3.3V is as the reference voltage of comparator simultaneously.
6, voltage sample circuit has electric resistance partial pressure to realize, according to the action thresholding of setting, is benchmark with 3.3V, chooses the divider resistance value.
7, communication module adopts AZ801 or the tight Fusion Module of AZ802GPS/GSM, and application program operates in the GSM chip and moves, and when program is normally moved, sees 1 watch dog signal off and gives MCU in per 5 seconds.
8, MCU adopts 8 micro controller systems (model P89LPC901) of NXP, as terminal power management and the software higher management that do not crash.Do not obtain Watch Dog signal and determine application software when stopping at MCU, through controlled LDO outage, power up the recovery system operation again.
9, adopt general-duty LM2093 two-way voltage comparator to check exterior vehicle cell pressure and device interior lithium cell voltage, when Vehicular battery voltage is lower than thresholding, notice MCU, MCU closes the DC-DC circuit, stops final terminal and uses Vehicle Power; When detecting lithium battery and force down, close whole module through the VBB that closes AZ801 or AZ802.Externally Vehicular battery voltage recovers just often, recovers to use Vehicle Power.
Claims (7)
1. the power management of a vehicle positioning tracing equipment and anti-deadlock control method is characterized in that, may further comprise the steps:
1) opening initialization;
2) go up electric delay for the first time, postpone the back micro controller system and open DC-DC circuit and Ge Lu low pressure difference linear voltage regulator (LDO);
3) wait for watchdog pulse;
4) after MCU receives watchdog pulse, open house dog;
5) judge whether house dog is normal, if yes, execution in step 10), if not, execution in step 6);
6) crash and restart;
7) close the first, the 3rd LDO;
8) wait for setting-up time;
9) open the first, the 3rd LDO, and return step 2);
10) whether first comparator detection exterior vehicle power supply sampling voltage is lower than the micro controller system power supply voltage, if yes, execution in step 14), if not, execution in step 11);
11) judge whether the DC-DC circuit is opened, and if yes, returns step 5), if not, execution in step 12);
12) micro controller system is opened the DC-DC circuit;
13) micro controller system is opened a LDO, the 3rd LDO;
14) judge whether the time length that exterior vehicle power supply sampling voltage is lower than the micro controller system power supply voltage reaches setting-up time, if yes, execution in step 15), if not, return step 5);
15) micro controller system is closed the DC-DC circuit;
16) second comparator judges whether inner lithium battery source sampling voltage is lower than the micro controller system power supply voltage, if yes, and execution in step 17), if not, return step 10);
17) judge whether the time length that inner lithium battery source sampling voltage is lower than the micro controller system power supply voltage reaches setting-up time, if yes, execution in step 18), if not, return step 5);
18) close a LDO, the 3rd LDO, and close house dog, return step 5).
2. the power management of a vehicle positioning tracing equipment and anti-deadlock control setup; It is characterized in that; Comprise MCU, first comparator, second comparator, first voltage sample circuit, power supply prime protective circuit, DC-DC circuit, charge management circuit, internal cell, second voltage sample circuit, a LDO, the 2nd LDO, the 3rd LDO, communication module; Described power supply prime protective circuit is connected with first comparator through first voltage sample circuit; Described MCU is connected with first comparator, second comparator, DC-DC circuit, a LDO, the 2nd LDO, the 3rd LDO, communication module respectively; Described power supply prime protective circuit is connected with the DC-DC circuit; Described DC-DC circuit is connected with charge management circuit; Connect in twos between described charge management circuit, internal cell, second voltage sample circuit, a LDO, the 2nd LDO, the 3rd LDO, described communication module is connected with charge management circuit, a LDO respectively, and described second voltage sample circuit is connected with second comparator.
3. the power management of a kind of vehicle positioning tracing equipment according to claim 2 and anti-deadlock control setup is characterized in that described DC-DC circuit is converted into the circuit of 5V DC for 9-36V DC.
4. the power management of a kind of vehicle positioning tracing equipment according to claim 2 and anti-deadlock control setup is characterized in that, a described LDO, the 3rd LDO are the LDO that band turn-offs control.
5. the power management of a kind of vehicle positioning tracing equipment according to claim 2 and anti-deadlock control setup is characterized in that, described MCU is 8 micro controller systems of NXP.
6. the power management of a kind of vehicle positioning tracing equipment according to claim 2 and anti-deadlock control setup is characterized in that, through the first voltage comparator state-detection, MCU control DC-DC closes and opens, and realize that external electric is battery-powered to close and open.
7. the power management of a kind of vehicle positioning tracing equipment according to claim 2 and anti-deadlock control setup; It is characterized in that; Through the second voltage comparator state-detection, MCU controls closing and opening of a LDO, the 3rd LDO, realizes that internal electrical is battery-powered to close and open.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110039842.4A CN102642472B (en) | 2011-02-17 | 2011-02-17 | Method and device for power management and deadlock protective control of vehicle-mounted positioning and tracking equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110039842.4A CN102642472B (en) | 2011-02-17 | 2011-02-17 | Method and device for power management and deadlock protective control of vehicle-mounted positioning and tracking equipment |
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| CN102642472A true CN102642472A (en) | 2012-08-22 |
| CN102642472B CN102642472B (en) | 2014-06-25 |
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| CN103368557A (en) * | 2013-07-12 | 2013-10-23 | 青岛歌尔声学科技有限公司 | Low quiescent current level switching circuit and electronic instrument comprising same |
| CN103679844A (en) * | 2013-10-08 | 2014-03-26 | 天瀚科技(吴江)有限公司 | Intelligent-control automobile data recorder and control method thereof |
| CN103744343A (en) * | 2014-01-24 | 2014-04-23 | 深圳市劲拓自动化设备股份有限公司 | Delay control method and system during equipment starting |
| CN103760939A (en) * | 2014-01-15 | 2014-04-30 | 小米科技有限责任公司 | Power supply method, power supply circuit, power supply, and terminal device |
| CN104049702A (en) * | 2014-06-16 | 2014-09-17 | 京信通信系统（中国）有限公司 | Single chip microcomputer-based CPU (Central Processing Unit) reset control system, method and device |
| WO2016197329A1 (en) * | 2015-06-09 | 2016-12-15 | Abb Schweiz Ag | Method and apparatus of configuring an operation mode of an automation device |
| CN113377186A (en) * | 2021-08-13 | 2021-09-10 | 深圳市有为信息技术发展有限公司 | Power management circuit, control method thereof, vehicle-mounted equipment and motor vehicle |
| CN115173673A (en) * | 2022-08-15 | 2022-10-11 | 芯洲科技（北京）有限公司 | Power supply device and power supply system |
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| CN113377186A (en) * | 2021-08-13 | 2021-09-10 | 深圳市有为信息技术发展有限公司 | Power management circuit, control method thereof, vehicle-mounted equipment and motor vehicle |
| CN113377186B (en) * | 2021-08-13 | 2021-11-19 | 深圳市有为信息技术发展有限公司 | Power management circuit, control method thereof, vehicle-mounted equipment and motor vehicle |
| CN115173673A (en) * | 2022-08-15 | 2022-10-11 | 芯洲科技（北京）有限公司 | Power supply device and power supply system |
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