Method and device for power management and deadlock protective control of vehicle-mounted positioning and tracking equipment

A technology of power management and control method, applied in the direction of power consumption device, data reset device, current collector, etc., can solve the problems of automatic startup of communication module, terminal can not be turned on, and long startup time of communication module, etc., so as to delay battery exhaustion time. , avoid logical conflict, avoid the effect of frequent switching

Inactive Publication Date: 2014-06-25
SHANGHAI ZENITECH ELECTRONICS TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 1) If the CPU of the communication module is the CPU of the application program when the vehicle positioning tracking service terminal product uses the CPU, if the application program crashes, because the communication module takes a long time to start, if the application program cannot feed the hardware watchdog in time, the communication module It will be reset frequently by the hardware watchdog, which will cause the terminal to fail to boot;
[0011] 2) The action time of the watchdog cannot be controlled by software;
[0012] 3) The lack of internal battery management of the terminal equipment, the problem that the communication module cannot automatically start when the external power supply is restored after the module is automatically shut down when the battery is exhausted, if there is no human intervention

Method used

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  • Method and device for power management and deadlock protective control of vehicle-mounted positioning and tracking equipment
  • Method and device for power management and deadlock protective control of vehicle-mounted positioning and tracking equipment

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Embodiment

[0052] Such as figure 1 As shown, a power management and anti-crash control method for a vehicle positioning tracking device includes the following steps:

[0053] Step 101, power-on initialization;

[0054] Step 102, the initial power-on delay, after the delay, the single-chip microcomputer turns on the DC-DC circuit and each LDO;

[0055] Step 103, waiting for the watchdog pulse;

[0056] Step 104, after the MCU receives the watchdog pulse, the watchdog is turned on;

[0057] Step 105, judge whether the watchdog is normal, if yes, execute step 110, if no, execute step 106;

[0058] Step 106, restart after crash;

[0059] Step 107, closing the first and third LDOs;

[0060] Step 108, waiting for the set time;

[0061] Step 109, turn on the first and third LDOs, and return to step 102;

[0062] Step 110, the first comparator detects whether the sampling voltage of the external vehicle power supply is lower than the power supply voltage of the single-chip microcomputer, ...

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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 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, and a third LDO, wherein the first comparator detects whether a vehicle power supply sampling voltage out of vehicle-mounted devices is less than an MCU power supply voltage, and judges whether a duration time of the vehicle power supply sampling voltage out of vehicle-mounted devices less than an MCU power supply voltage reaches a preset time, the second comparator judges whether an interior lithium battery power supply sampling voltage is less than the MCU power supply voltage, and judges whether the duration time of the of the interior lithium battery power supply sampling less than the MCU power supply voltage reaches the preset time. 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 [0001] The invention relates to a vehicle-mounted positioning and tracking device, in particular to a method and device for power management and anti-crash control of the vehicle-mounted positioning and tracking device. Background technique [0002] Vehicle positioning and tracking service terminal products usually use GPS technology, communication technologies such as GSM, CDMA, 3G, etc., and microprocessors (MCU, ARM7, ARM9, etc.). The basic functions of the main products are equivalent, including vehicle positioning, anti-theft and anti-robbery alarms , Vehicle oil and power cut off, display scheduling information and other functions. [0003] The current technical status of the product is as follows: [0004] 1) Generally, the overall structure of electrical appliances is power supply, GPS module, GSM, microprocessor, general IO, analog input, etc.; [0005] 2) The corresponding DC-DC circuit is used, and the vehicle power supply is 9V to 36V [0006] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L1/00B60L3/00G06F1/24
Inventor 周文正王喜超龚璐
Owner SHANGHAI ZENITECH ELECTRONICS TECH DEV
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