Power management apparatus, method and combined navigation positioning device

Abstract

The embodiment of the application provides a power management device, a method and a combined navigation positioning device, the power management device comprises a communication chip, a micro control unit and a power management chip, the power management chip is used for outputting a sleep instruction signal to the micro control unit when a sleep signal is detected; the micro control unit is used for sending a sleep request to the communication chip according to the sleep instruction signal; the communication chip is used for executing a sleep action according to the sleep request; the micro control unit is also used for closing all peripherals of the micro control unit after the communication chip completes the sleep action, and outputting a sleep completion signal to the power management chip after all peripherals are closed; and the power management chip is also used for powering off the micro control unit according to the sleep completion signal. According to the scheme, the dark current consumption is reduced in the mode of powering off the micro control unit and sleeping the communication chip without affecting the business requirement, so that the dark current consumption of the combined navigation positioning device meets the low-power consumption standard.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile navigation, in particular to a power management device, method and combined navigation positioning equipment. BACKGROUND

[0002] With the increasing development of intelligent vehicles, high-precision combined navigation plays an indispensable role in the field of automatic driving. Generally, high-precision combined navigation uses a micro control unit with high computing power to provide higher computing power, so as to realize real-time accurate positioning and navigation functions. However, the micro control unit with high computing power generates large power consumption, and it is difficult to solve the problem of excessive dark current of the automobile through the methods of designing circuit, adding resistance, adding power amplifier, etc. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a power management device, method and combined navigation positioning equipment, which can reduce dark current consumption by means of power-off of the micro control unit and hibernation of the communication chip without affecting business needs, so that the dark current consumption of the combined navigation positioning equipment meets the low-power consumption standard.

[0004] In order to achieve the above-mentioned purpose, the technical solutions adopted by the embodiments of the present application are as follows:

[0005] In a first aspect, the present application provides a power management device, comprising a communication chip, a micro control unit and a power management chip; the power management chip is electrically connected with the communication chip and the micro control unit, the communication chip is communicatively connected with the micro control unit, and the power management chip is used to power the micro control unit;

[0006] The power management chip is used to output a hibernation indication signal to the micro control unit when a hibernation signal is detected;

[0007] The micro control unit is used to send a hibernation request to the communication chip according to the hibernation indication signal;

[0008] The communication chip is used to perform a hibernation action according to the hibernation request;

[0009] The micro control unit is also used to close all peripherals of the micro control unit after the communication chip completes the hibernation action, and output a hibernation completion signal to the power management chip after closing all peripherals;

[0010] The power management chip is also used to power off the micro control unit according to the hibernation completion signal.

[0011] In an optional embodiment, the communication chip runs a timer module, a wake-up module and a power management module;

[0012] The communication chip is configured to receive the sleep request through the power management module, and send a suspension running instruction to other modules running on the communication chip except the timer module and the wake-up module through the power management module;

[0013] The communication chip is further configured to wake up the modules in the sleep state in the communication chip through the timer module.

[0014] The communication chip is further configured to interact information between the wake-up module and the cloud platform server.

[0015] In an optional implementation, the power management chip is further configured to supply power to the micro control unit and output a wake-up indication signal to the micro control unit when detecting the wake-up signal.

[0016] The micro control unit is further configured to start all peripherals of the micro control unit according to the wake-up indication signal, and send a wake-up request to the communication chip.

[0017] The communication chip is further configured to perform a wake-up action according to the wake-up request.

[0018] In an optional implementation, the communication chip is in communication connection with a terminal device; the wake-up signal is generated by the communication chip according to wake-up notification information sent by the terminal device, and output to the power management chip.

[0019] In an optional implementation, the communication chip comprises a first pin; the power management chip comprises a second pin; the first pin and the second pin are electrically connected.

[0020] The communication chip is configured to output the wake-up signal to the power management chip through the first pin.

[0021] In an optional implementation, the power management chip comprises a third pin, and the micro control unit comprises a fourth pin; the third pin and the fourth pin are electrically connected.

[0022] The power management chip is configured to output the sleep indication signal or the wake-up indication signal to the micro control unit through the third pin.

[0023] In an optional implementation, the power management chip is further connected with a control terminal; the power management chip is configured to acquire the sleep signal or the wake-up signal through the control terminal.

[0024] In an optional embodiment, the power management chip is connected with the control terminal through a CAN bus, and the power management chip is configured to obtain the sleep signal or the wake-up signal according to a CAN message sent by the control terminal.

[0025] In an optional embodiment, the power management chip is connected with the control terminal through an Ethernet, and the power management chip is configured to obtain the sleep signal or the wake-up signal according to an Ethernet message sent by the control terminal.

[0026] In an optional embodiment, the power management chip is electrically connected with the control terminal, and the power management chip is configured to obtain a level signal output by the control terminal; the level signal is the sleep signal or the wake-up signal.

[0027] In an optional embodiment, the control terminal comprises at least one of an automobile controller, an automobile igniter, an automobile instrument panel, and an automatic driving device.

[0028] In an optional embodiment, the communication chip is connected with the micro control unit through a synchronous serial bus or a general serial data bus.

[0029] In a second aspect, the present application provides a power management method applied to a power management device, wherein the power management device comprises a communication chip, a micro control unit and a power management chip; the power management chip is electrically connected with the communication chip and the micro control unit, the communication chip is connected with the micro control unit in communication, and the power management chip is configured to supply power to the micro control unit; the method comprises:

[0030] The power management chip outputs a sleep indication signal to the micro control unit when detecting a sleep signal;

[0031] The micro control unit sends a sleep request to the communication chip according to the sleep indication signal;

[0032] The communication chip performs a sleep action according to the sleep request;

[0033] The micro control unit closes all peripherals of the micro control unit after the communication chip completes the sleep action, and outputs a sleep completion signal to the power management chip after closing all peripherals;

[0034] The power management chip powers off the micro control unit according to the sleep completion signal.

[0035] In an optional embodiment, the method further comprises:

[0036] The power management chip supplies power to the micro control unit and outputs a wake-up indication signal to the micro control unit when detecting a wake-up signal.

[0037] The micro control unit turns on all peripherals of the micro control unit according to the wake-up indication signal and sends a wake-up request to the communication chip.

[0038] The communication chip performs a wake-up action according to the wake-up request.

[0039] In a third aspect, the present application provides a combined navigation positioning device, which comprises the power management device according to any one of the preceding embodiments.

[0040] Compared with the prior art, the power management device, method and combined navigation positioning device provided by the embodiments of the present application have the following advantages: the power management device comprises a communication chip, a micro control unit and a power management chip, the power management chip is electrically connected with the communication chip and the micro control unit, the communication chip is in communication connection with the micro control unit, and the power management chip is used for supplying power to the micro control unit; the power management chip is used for outputting a sleep indication signal to the micro control unit when detecting a sleep signal; the micro control unit is used for sending a sleep request to the communication chip according to the sleep indication signal; the communication chip is used for performing a sleep action according to the sleep request; the micro control unit is further used for turning off all peripherals of the micro control unit after the communication chip completes the sleep action, and outputting a sleep completion signal to the power management chip after turning off all peripherals; and the power management chip is further used for powering off the micro control unit according to the sleep completion signal. The scheme reduces dark current consumption by powering off the micro control unit and putting the communication chip to sleep without affecting business requirements, so that the dark current consumption of the combined navigation positioning device meets the low-power consumption standard.

[0041] In order to make the above objectives, characteristics and advantages of the present application more apparent, clear and easy to understand, the following preferred embodiments are specifically described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0043] Figure 1 Fig. 1 shows a structure schematic diagram of the power management device provided by the embodiments of the present application.

[0044] Figure 2 Fig. 2 shows a schematic diagram of an application scenario of power management.

[0045] Figure 3 Fig. 1 shows a flow diagram of a power management method according to an embodiment of the present application.

[0046] Figure 4 Fig. 2 shows another flow diagram of a power management method according to an embodiment of the present application.

[0047] Fig. 1 shows a flow diagram of a power management method according to an embodiment of the present application. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0049] Therefore, the detailed description of the embodiments of the present application provided in the accompanying drawings below is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0050] It should be noted that the relational terms such as "first" and "second" and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a list of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent in such a process, method, article or apparatus. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of additional identical elements in the process, method, article or apparatus that includes the element.

[0051] The automobile dark current refers to the automobile no working state, that is, the ignition switch or the electrical switch is disconnected, and the current still exists. The dark current can maintain the data memory function of the automobile control unit, for example, the audio control unit can remember the songs listened to, and the air conditioning control unit can remember the air conditioning speed and direction settings. At the same time, the dark current can provide power for high-precision integrated navigation or anti-theft system to ensure real-time positioning monitoring function.

[0052] At present, in order to provide real-time high-precision navigation data for intelligent driving, the required computing power of high-precision integrated navigation is much higher than that of automobile navigation system. High-precision integrated navigation uses high-power micro control unit to improve computing power. However, high power consumption leads to increase of automobile dark current. It is difficult to solve the problem of exceeding dark current through the design of circuit or switching low-power mode.

[0053] Based on this, the embodiment of the present application provides a power management device and method, which reduces the dark current consumption by means of micro control unit power-off and communication chip hibernation without affecting business needs, so that the dark current consumption of integrated navigation positioning equipment meets the low-power standard.

[0054] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0055] Figure 1 The structure schematic diagram of the power management device 10 provided by the embodiment of the present application is shown, which provides an implementation manner of the power management device. Please refer to Figure 1 The power management device 10 includes a communication chip 100, a micro control unit 200 and a power management chip 300. The power management chip 300 is electrically connected with the communication chip 100 and the micro control unit 200. The communication chip 100 is in communication connection with the micro control unit 200. The power management chip 300 is used for supplying power to the micro control unit 200.

[0056] The power management chip 300 is used for outputting a hibernation instruction signal to the micro control unit 200 when detecting the hibernation signal. The micro control unit 200 is used for sending a hibernation request to the communication chip 100 according to the hibernation instruction signal. The communication chip 100 is used for executing hibernation action according to the hibernation request.

[0057] The micro control unit 200 is also used for closing all peripherals of the micro control unit 200 after the communication chip 100 completes the hibernation action, and outputting a hibernation completion signal to the power management chip 300 after closing all peripherals. The power management chip 300 is also used for powering off the micro control unit 200 according to the hibernation completion signal.

[0058] In the embodiment of the present application, the communication chip 100 can be a telematics box (TBOX) chip, mainly used for wireless communication connection. The TBOX chip can be a 4G module chip or a 5G module chip, and the present application is not limited thereto.

[0059] The micro control unit 200 can use a high-performance micro control unit (MCU) chip, mainly used for calculating the data collected by the inertial navigation system (INS) and the inertial measurement unit (IMU), and outputting high-precision positioning. The power management chip 300 can be a power management integrated circuit (PMIC), mainly used for managing power supply devices in the host system. It can control and monitor the input and output of various voltages and powers in the power supply device, so as to ensure the stable and safe operation of the power supply device.

[0060] In the embodiment of the present application, the power management chip 300 serves as the power supply of the micro control unit 200, controls the micro control unit 200 and the communication chip 100 to perform power management together according to the sleep signal, so as to achieve the effect of reducing dark current.

[0061] It should be noted that when the power management chip 300 detects the sleep signal, it outputs a sleep instruction signal to the micro control unit 200, notifies the micro control unit 200 to perform the sleep action, and the micro control unit 200 sends a sleep request to the communication chip 100. The communication chip 100 performs the sleep action according to the sleep request, suspends the running of a part of software modules on the chip, and enters the sleep state. After the communication chip 100 performs the sleep action of the software module, it notifies the micro control unit 200 that the sleep has been completed. The micro control unit 200 closes all peripherals, such as USB interface, global navigation satellite system (GNSS) interface, inertial measurement unit (IMU) interface and serial peripheral interface (SPI) and the like. After all peripherals are closed, the micro control unit 200 notifies the power management chip 300 that the sleep operation has been completed, and the power management chip 300 powers off the micro control unit 200 through the pin.

[0062] In summary, the power management device provided by the embodiment of the application includes a communication chip, a micro control unit and a power management chip, the power management chip is electrically connected with the communication chip and the micro control unit, the communication chip is in communication connection with the micro control unit, and the power management chip is used for supplying power for the micro control unit; the power management chip is used for outputting a sleep instruction signal to the micro control unit when a sleep signal is detected; the micro control unit is used for sending a sleep request to the communication chip according to the sleep instruction signal; the communication chip is used for executing a sleep action according to the sleep request; the micro control unit is further used for closing all peripherals of the micro control unit after the communication chip completes the sleep action, and outputting a sleep completion signal to the power management chip after all the peripherals are closed; and the power management chip is further used for powering off the micro control unit according to the sleep completion signal. The scheme reduces dark current consumption in the mode of powering off the micro control unit and sleeping the communication chip without affecting business requirements, so that the dark current consumption of the combined navigation positioning device meets the low-power consumption standard.

[0063] Optionally, in actual application, the communication chip 100 can realize remote control operation of the vehicle through a running software module. The communication chip 100 runs a timer module, a wake-up module and a power management module, the communication chip 100 is used for receiving a sleep request through the power management module, and sending a pause running instruction to other modules running on the communication chip 100 except the timer module and the wake-up module through the power management module.

[0064] The communication chip 100 is further used for waking up the modules in the sleep state in the communication chip 100 through the timer module, and performing information interaction between the wake-up module and the cloud platform server.

[0065] In the embodiment of the application, the communication chip 100 can realize remote control of the vehicle, for example, control instructions such as opening and closing the lock, opening and closing the air conditioner, opening and closing the door and window, and charging, or querying vehicle information. In order to support real-time query of vehicle information by the user and the vehicle-mounted system, the software module on the communication chip 100 is always in a running state for executing the vehicle control instruction or collecting the related information of the vehicle.

[0066] In the embodiment of the application, in order to reduce the dark current of the vehicle, the communication chip 100 receives the sleep request sent by the micro control unit 200 through the power management module, and the power management module notifies other modules except the timer module and the wake-up module to pause running according to the sleep request, and enters the sleep state, that is, the software module enters the low-power consumption mode, so as to further reduce the dark current.

[0067] The communication chip 100 keeps the timer module in normal operation, the timer module dynamically adjusts the running state of other software modules on the communication chip 100 through timing sleep or timing wake-up, and dynamically adjusts the power consumption mode of the micro control unit 200, so as to reduce the dark current consumption as much as possible. The timer module wakes up the modules in the sleep state in the communication chip 100 at regular intervals, performs operations such as collecting vehicle state data, waking up the camera to record traffic accident data, and sends the data to the cloud platform server, which is used to maintain the remote wireless communication connection with the cloud platform server.

[0068] Optionally, in actual application, in order to ensure that the power management chip can detect the wake-up signal at any time, the power management chip 300 itself maintains no power-off.

[0069] The power management chip 300 is also used for supplying power to the micro control unit 200 when detecting the wake-up signal, and outputting a wake-up indication signal to the micro control unit 200; the micro control unit 200 is also used for starting all peripherals of the micro control unit 200 according to the wake-up indication signal, and sending a wake-up request to the communication chip 100; the communication chip 100 is also used for executing a wake-up action according to the wake-up request.

[0070] In the embodiment of the application, when the power management chip 300 detects the wake-up signal, the power supply to the micro control unit 200 is restored, and a wake-up indication signal is output to the micro control unit 200, and according to the wake-up indication signal, the micro control unit 200 starts all peripherals, and after the peripherals are successfully started, a wake-up request is sent to the communication chip 100 through the peripheral interface. The communication chip 100 restores all modules in the sleep state to the running state according to the received wake-up request. Thus, the communication chip 100 and the micro control unit 200 are in normal state, and can process business in time.

[0071] It can be seen that the power management chip 300 detects the sleep signal or the wake-up signal in real time, reduces the dark current consumption, and also restores the working state of the communication chip 100 and the micro control unit 200 in time, so as to ensure that the combined navigation positioning device can collect vehicle information in time, improve the vehicle navigation positioning accuracy, and avoid economic loss caused by vehicle collision, water ingress or loss.

[0072] Optionally, in actual application, the user can send the wake-up notification information to the communication chip through the terminal device. Please refer to Figure 2 The communication chip 100 is in communication connection with the terminal device 400; the wake-up signal is generated by the communication chip 100 according to the wake-up notification information sent by the terminal device 400, and is output to the power management chip 300.

[0073] In the embodiment of the present application, the terminal device 400 can send the wake-up notification information to the communication chip 100 in the form of short message, remote control data or telephone, and the wake-up module of the communication chip 100 receives the wake-up notification information, and then notifies the power management module of the communication chip 100 to generate a wake-up signal and output the wake-up signal to the power management chip 300.

[0074] The terminal device 400 can be a mobile phone, a personal computer (PC), a personal digital assistant (PDA), a notebook computer, a tablet computer, etc., which is not limited in the embodiment of the present application.

[0075] Taking the terminal device 400 as a mobile phone as an example, as an implementation, the user can control the car function through the mobile phone app, for example, press the button to start the air conditioner, the mobile phone app sends the start air conditioner instruction to the cloud platform, the cloud platform receives the instruction and queries whether the current vehicle is in the sleep state, if in the sleep state, sends a wake-up short message to the communication chip 100, the wake-up module of the communication chip 100 receives the wake-up short message and notifies the power management module of the communication chip 100 to generate a wake-up signal and output the wake-up signal to the power management chip 300.

[0076] As another implementation, the user can also dial the telephone number of the combined navigation positioning device through the mobile phone, and the wake-up module of the communication chip 100 receives the telephone and notifies the power management module of the communication chip 100 to generate a wake-up signal and output the wake-up signal to the power management chip 300.

[0077] Optionally, in actual application, the communication chip 100 sends the wake-up signal to the power management chip 300 through the pin. Please continue to refer to Figure 2 The communication chip 100 includes a first pin 101, the power management chip 300 includes a second pin 301, the first pin 101 and the second pin 301 are electrically connected, and the communication chip 100 is used to output the wake-up signal to the power management chip 300 through the first pin 101.

[0078] In the embodiment of the present application, the first pin 101 of the communication chip 100 is electrically connected with the second pin 301 of the power management chip 300, the power management module of the communication chip 100 outputs the high level as the wake-up signal to the second pin 301 through the first pin 101, and the power management chip 300 detects the high level and executes the wake-up operation.

[0079] Optionally, in actual application, the power management chip 300 sends the sleep instruction signal or the wake-up instruction signal to the micro control unit 200 through the pin. Please continue to refer to Figure 2The power management chip 300 includes a third pin 302, the micro control unit 200 includes a fourth pin 201, the third pin 302 and the fourth pin 201 are electrically connected, and the power management chip 300 is used for outputting a sleep indication signal or a wake-up indication signal to the micro control unit 200 through the third pin 302.

[0080] In the embodiment of the present application, the third pin 302 of the power management chip 300 is electrically connected with the fourth pin 201 of the micro control unit 200, and the power management chip 300 outputs a high level or a low level to the fourth pin 201 through the third pin 302. Among them, the high level is used as a wake-up indication signal, and the low level is used as a sleep indication signal.

[0081] It should be noted that in the embodiment of the present application, the high level is used to indicate that the wake-up operation needs to be performed, and the low level is used to indicate that the sleep operation needs to be performed. In actual application, the high level can also be set as a sleep indication signal, and the low level can be set as a wake-up indication signal. Therefore, which level signal is used to indicate wake-up or sleep is not limited in the embodiment of the present application, and can be set according to the actual application scene.

[0082] Optionally, in actual application, in addition to that the communication chip 100 outputs a wake-up signal to the power management chip 300, the control terminal also outputs a sleep signal or a wake-up signal to the power management chip 300. Please continue to refer to Figure 2 The power management chip 300 is also connected with a control terminal 500; and the power management chip 300 is used for obtaining a sleep signal or a wake-up signal through the control terminal 500.

[0083] In the embodiment of the present application, the control terminal 500 can be one or more. For example, the control terminal 500 can include at least one of a car controller, a car igniter, a car instrument panel and an automatic driving device.

[0084] Among them, the car controller can include an air conditioner controller, a car window sunroof controller, an engine and other car parts. Of course, in actual application, the control terminal 500 can also be other control parts of the car, and the embodiment of the present application does not limit this.

[0085] Optionally, the power management chip 300 is connected with the control terminal 500 through a CAN bus, and the power management chip 300 is used for obtaining a sleep signal or a wake-up signal according to a CAN message sent by the control terminal 500.

[0086] In the embodiment of the present application, when the control terminal 500 is a car controller, the control terminal 500 can be connected with the power management chip through a CAN bus, and the control terminal 500 sends a sleep signal or a wake-up signal to the power management chip 300 through a CAN message.

[0087] As an implementation, when the control terminal 500 is a window sunroof controller, assuming that the driver or passenger opens the window, the window sunroof controller generates a CAN message with a wake-up signal in response to the window opening operation, and sends the CAN message to the power management chip 300, and the software system running on the power management chip 300 parses the CAN message to obtain the wake-up signal.

[0088] Optionally, the power management chip 300 is connected with the control terminal 500 through Ethernet, and the power management chip 300 is configured to obtain the sleep signal or the wake-up signal according to the Ethernet message sent by the control terminal 500.

[0089] In the embodiment of the application, when the control terminal 500 is an instrument panel, the control terminal 500 can be connected with the power management chip 300 through Ethernet, and the control terminal 500 sends the sleep signal or the wake-up signal to the power management chip 300 through the Ethernet message.

[0090] For example, the driver presses the button to make the instrument panel enter the sleep state, and the instrument panel system generates an Ethernet message with a sleep signal in response to the sleep operation, and sends the Ethernet message to the power management chip 300, and the software system running on the power management chip 300 parses the Ethernet message to obtain the sleep signal.

[0091] Optionally, the power management chip 300 is connected with the control terminal 500 through Ethernet, and the power management chip 300 is configured to obtain the sleep signal or the wake-up signal according to the Ethernet message sent by the control terminal 500.

[0092] In the embodiment of the application, when the control terminal 500 is an automobile igniter, the control terminal 500 can be connected with the power management chip 300 through Ethernet, and the control terminal 500 sends the sleep signal or the wake-up signal to the power management chip 300 through the Ethernet message.

[0093] For example, the driver twists the key to the ON state of the start switch, and the automobile igniter outputs a high level to the power management chip 300, and the power management chip 300 detects the high level and performs the wake-up operation; assuming that the driver twists the key to the OFF state of the start switch, the automobile igniter outputs a low level to the power management chip 300, and the power management chip 300 detects the low level and performs the sleep operation.

[0094] Optionally, in actual application, the communication chip 100 and the micro control unit 200 are connected through a synchronous serial bus and a general serial data bus. The communication chip 100 and the micro control unit 200 are connected through the synchronous serial bus or the general serial data bus.

[0095] In the embodiment of the present application, in order to ensure the stable communication between the communication chip 100 and the micro control unit 200, the communication chip 100 and the micro control unit 200 establish two kinds of communication connections by using a serial bus and a universal serial data bus.

[0096] The universal serial data bus adopts a full-duplex serial asynchronous transceiving protocol to transmit data, and transmits the binary bits of data one by one. When the communication chip 100 and the micro control unit 200 communicate by using the universal serial data bus, the transmission rate and special data bits must be agreed in advance. When the universal serial data bus is used for communication, two signal lines are needed, which allows two different devices to perform serial communication with each other without a clock, and the check bits in the transmitted data can be used for error detection, thereby ensuring the reliability of data transmission.

[0097] The synchronous serial bus adopts a full-duplex synchronous serial data transmission protocol to transmit data, and can continuously and uninterruptedly send or receive any number of data bits, thereby ensuring the transmission of data at a high rate. In the embodiment of the present application, according to the data amount and reliability requirements of the data to be transmitted, the synchronous serial bus or the universal serial data bus can be selected to realize the transmission of the related information of the sleep request or the wake-up request between the communication chip 100 and the micro control unit 200.

[0098] Based on the same inventive concept, the embodiment of the present application also provides a power management method. The basic principle and the generated technical effects of the power management method are the same as those of the above-mentioned embodiment. For brief description, the part of the embodiment not mentioned can refer to the corresponding content of the above-mentioned embodiment.

[0099] Please refer to Figure 3 , Figure 3 Fig. 1 shows a flowchart of a power management method provided by the embodiment of the present application. The method is applied to a power management device, and the power management device includes a communication chip, a micro control unit and a power management chip. The power management chip is electrically connected with the communication chip and the micro control unit, the communication chip is in communication connection with the micro control unit, and the power management chip is used for supplying power to the micro control unit. The method includes the following steps:

[0100] In step S601, the power management chip outputs a sleep indication signal to the micro control unit when detecting a sleep signal.

[0101] In step S602, the micro control unit sends a sleep request to the communication chip according to the sleep indication signal.

[0102] In step S603, the communication chip performs a sleep action according to the sleep request.

[0103] In step S604, the micro control unit closes all peripherals of the micro control unit after the communication chip completes the sleep action, and outputs a sleep completion signal to the power management chip after closing all peripherals.

[0104] In step S605, the power management chip powers off the micro control unit according to the sleep completion signal.

[0105] In conclusion, the power management method provided by the embodiment of the application, the power management device includes a communication chip, a micro control unit and a power management chip, the power management chip is electrically connected with the communication chip and the micro control unit, the communication chip is in communication connection with the micro control unit, and the power management chip is used for powering the micro control unit; the power management chip outputs a sleep instruction signal to the micro control unit when detecting a sleep signal; the micro control unit sends a sleep request to the communication chip according to the sleep instruction signal; the communication chip executes a sleep action according to the sleep request; the micro control unit closes all peripherals of the micro control unit after the communication chip completes the sleep action, and outputs a sleep completion signal to the power management chip after closing all peripherals; and the power management chip powers off the micro control unit according to the sleep completion signal. The scheme reduces dark current consumption by powering off the micro control unit and putting the communication chip into sleep without affecting business requirements, so that the dark current consumption of the combined navigation positioning device meets the low power consumption standard.

[0106] Optionally, in addition to detecting the sleep signal, the power management chip also detects a wake-up signal and performs a corresponding wake-up operation, please refer to Figure 4 The power management method further includes the following steps:

[0107] In step S701, the power management chip powers on the micro control unit and outputs a wake-up instruction signal to the micro control unit when detecting a wake-up signal.

[0108] In step S702, the micro control unit opens all peripherals of the micro control unit according to the wake-up instruction signal, and sends a wake-up request to the communication chip.

[0109] In step S703, the communication chip executes a wake-up action according to the wake-up request.

[0110] Optionally, the communication chip runs a timer module, a wake-up module and a power management module, and the method further includes the following steps:

[0111] The communication chip receives the sleep request through the power management module, and sends a pause running instruction to other modules running on the communication chip except the timer module and the wake-up module through the power management module; the communication chip also wakes up the modules in the sleep state in the communication chip through the timer module; and the communication chip also performs information interaction between the communication chip and the cloud platform server through the wake-up module.

[0112] Optionally, the communication chip is in communication connection with the terminal device, the wake-up signal is generated by the communication chip according to the wake-up notification information sent by the terminal device, and output to the power management chip.

[0113] Optionally, the communication chip comprises a first pin; the power management chip comprises a second pin, the first pin and the second pin are electrically connected, and the communication chip outputs the wake-up signal to the power management chip through the first pin.

[0114] Optionally, the power management chip comprises a third pin, the micro control unit comprises a fourth pin, the third pin and the fourth pin are electrically connected, and the power management chip outputs the sleep indication signal or the wake-up indication signal to the micro control unit through the third pin.

[0115] Optionally, the power management chip is further connected with the control terminal, and the power management chip obtains the sleep signal or the wake-up signal through the control terminal.

[0116] Optionally, the power management chip is connected with the control terminal through the CAN bus, and the power management chip obtains the sleep signal or the wake-up signal according to the CAN message sent by the control terminal.

[0117] Optionally, the power management chip is connected with the control terminal through the Ethernet, and the power management chip obtains the sleep signal or the wake-up signal according to the Ethernet message sent by the control terminal.

[0118] Optionally, the power management chip is electrically connected with the control terminal, and the power management chip obtains the level signal output by the control terminal; the level signal is the sleep signal or the wake-up signal.

[0119] Optionally, the control terminal comprises at least one of an automobile controller, an automobile igniter, an automobile instrument panel and an automatic driving device.

[0120] Optionally, the communication chip is in communication connection with the micro control unit through a synchronous serial bus or a universal serial data bus.

[0121] The embodiment of the application further provides a combined navigation positioning device, and the combined navigation positioning device comprises the power management device disclosed in the above-mentioned embodiments.

[0122] In several embodiments provided by the present application, it should be understood that the disclosed apparatus and method can also be implemented in other manners. The described embodiments of the apparatus are merely exemplary, and the present application can be implemented in other manners. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation modes of the apparatus, method and computer program product according to the embodiments of the present application. In this regard, each block in the flowcharts or block diagrams can represent a module, a segment or a part of a code, which comprises one or more executable instructions for implementing the specified logic function. It should also be noted that in some alternative implementation modes, the functions noted in the blocks can occur in a different order from that noted in the accompanying drawings. For example, two consecutive blocks can actually be executed in a substantially parallel manner, or they can be executed in a reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and the combination of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system for implementing the specified functions or actions, or by a combination of dedicated hardware and computer instructions.

[0123] In addition, each functional module in the various embodiments of the present application can be integrated together to form a separate part, or each module can exist independently, or two or more modules can be integrated to form a separate part.

[0124] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application, essentially or the part that contributes to the prior art, or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0125] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A power management device, characterized by, The power management device is applied to a combined navigation positioning device, and comprises a communication chip, a micro control unit and a power management chip; the power management chip is electrically connected with the communication chip and the micro control unit; the communication chip is in communication connection with the micro control unit; the power management chip is used for powering the micro control unit; the communication chip runs a timer module, a wake-up module and a power management module; The power management chip is used for outputting a sleep instruction signal to the micro control unit when a sleep signal is detected; The micro control unit is used for sending a sleep request to the communication chip according to the sleep instruction signal; The communication chip is used for receiving the sleep request through the power management module, and sending a pause running instruction to other modules running on the communication chip except the timer module and the wake-up module through the power management module; The micro control unit is also used for closing all peripherals of the micro control unit after the communication chip completes a sleep action, and outputting a sleep completion signal to the power management chip after all peripherals are closed; The power management chip is also used for powering off the micro control unit according to the sleep completion signal.

2. The power management device of claim 1, wherein, The communication chip is also used for timing wake-up of modules in a sleep state in the communication chip through the timer module; The communication chip is also used for information interaction between the wake-up module and a cloud platform server.

3. The power management device of claim 1, wherein, The power management chip is also used for powering on the micro control unit and outputting a wake-up instruction signal to the micro control unit when a wake-up signal is detected; The micro control unit is also used for starting all peripherals of the micro control unit according to the wake-up instruction signal, and sending a wake-up request to the communication chip; The communication chip is also used for executing a wake-up action according to the wake-up request.

4. The power management device of claim 3, wherein, The communication chip is in communication connection with a terminal device; the wake-up signal is generated by the communication chip according to wake-up notification information sent by the terminal device, and is output to the power management chip.

5. The power management device of claim 4, wherein, The communication chip comprises a first pin; the power management chip comprises a second pin; the first pin and the second pin are electrically connected; The communication chip is used for outputting the wake-up signal to the power management chip through the first pin.

6. The power management apparatus according to any one of claims 3 to 5, characterized by, The power management chip comprises a third pin, and the micro control unit comprises a fourth pin; the third pin and the fourth pin are electrically connected; The power management chip is used for outputting the sleep instruction signal or the wake-up instruction signal to the micro control unit through the third pin.

7. The power management device of claim 3, wherein, The power management chip is also connected with a control terminal; the power management chip is used for acquiring the sleep signal or the wake-up signal through the control terminal.

8. The power management device of claim 7, wherein, The power management chip is connected with the control terminal through a CAN bus; the power management chip is used for obtaining the sleep signal or the wake-up signal according to a CAN message sent by the control terminal.

9. The power management device of claim 7, wherein, The power management chip is connected with the control terminal through Ethernet, and is used for obtaining the sleep signal or the wake-up signal according to Ethernet messages sent by the control terminal.

10. The power management device of claim 7, wherein, The power management chip is connected with the control terminal through Ethernet, and is used for obtaining the sleep signal or the wake-up signal according to Ethernet messages sent by the control terminal.

11. The power management device of claim 7, wherein, The control terminal comprises at least one of a car controller, a car igniter, a car instrument panel and an automatic driving device.

12. The power management device of claim 1, wherein, The communication chip is connected with the micro control unit through a synchronous serial bus or a general serial data bus.

13. A power management method, characterized by, The power management device applied to a combined navigation positioning device comprises a communication chip, a micro control unit and a power management chip; the power management chip is connected with the communication chip and the micro control unit; the communication chip is connected with the micro control unit; the power management chip is used for supplying power to the micro control unit; the communication chip runs a timer module, a wake-up module and a power management module; the method comprises: When the power management chip detects the sleep signal, the power management chip outputs a sleep instruction signal to the micro control unit; The micro control unit sends a sleep request to the communication chip according to the sleep instruction signal; The communication chip receives the sleep request through the power management module, and sends a pause running instruction to other modules running on the communication chip except the timer module and the wake-up module through the power management module; After the communication chip completes the sleep action, the micro control unit closes all peripherals of the micro control unit, and outputs a sleep completion signal to the power management chip after closing all peripherals; The power management chip powers off the micro control unit according to the sleep completion signal.

14. The power management method of claim 13, wherein, The method further comprises: When the power management chip detects the wake-up signal, the power management chip supplies power to the micro control unit and outputs a wake-up instruction signal to the micro control unit; The micro control unit opens all peripherals of the micro control unit according to the wake-up instruction signal, and sends a wake-up request to the communication chip; The communication chip executes a wake-up action according to the wake-up request.

15. A combined navigation positioning device, characterized by The combined navigation positioning device comprises the power management device according to any one of claims 1-12.

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