CN111800150A - Vehicle-mounted equipment power supply management method and related components - Google Patents
Vehicle-mounted equipment power supply management method and related components Download PDFInfo
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- CN111800150A CN111800150A CN202010616746.0A CN202010616746A CN111800150A CN 111800150 A CN111800150 A CN 111800150A CN 202010616746 A CN202010616746 A CN 202010616746A CN 111800150 A CN111800150 A CN 111800150A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1607—Supply circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/08—Constructional details, e.g. cabinet
- H04B1/082—Constructional details, e.g. cabinet to be used in vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3822—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving specially adapted for use in vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
Abstract
In the vehicle-mounted equipment power supply management method, when the communication module is switched to a low frequency band, the DCDC power supply is turned off, the LDO power supply supplies power to the communication module, the DCDC power supply stops working, the problem of interference of the DCDC power supply to the low frequency band of the communication module does not exist, meanwhile, the LDO power supply does not have switching frequency and does not generate interference to an antenna of the communication module, and therefore the stability of 2G network communication can be ensured by supplying power to the LDO power supply; when the communication module is switched to a high frequency band, the communication module is switched to a DCDC power supply for power supply, so that efficient and stable power supply of the power module can be ensured. Therefore, the method can effectively solve the problem of poor low-frequency-band receiving sensitivity of the DCDC to the communication module, and ensures long-term stable operation of the vehicle-mounted equipment. The application also provides a vehicle-mounted device power supply management device, the vehicle-mounted device and a readable storage medium, and the vehicle-mounted device power supply management device has the beneficial effects.
Description
Technical Field
The present disclosure relates to the field of electronic technologies, and in particular, to a method and an apparatus for managing a power supply of a vehicle-mounted device, and a readable storage medium.
Background
The on-board OBD (on-board diagnostics) equipment is mainly used for vehicle data acquisition, diagnosis and the like, and can also upload data to a remote platform through a 4G communication module, so that important duties are borne in the vehicle.
OBD inner space is little, and has integrateed multiple functions such as CAN, GPS, 4G simultaneously, and inside electromagnetic environment is complicated, and OBD complete machine system power management design is complicated simultaneously, for guaranteeing that the high efficiency lasts the power supply, and its power generally adopts 2 grades of DCDC power supply design. The frequency of the DCDC power supply is generally 300K-2.2M, the frequency is higher, the electromagnetic environment of the whole machine becomes more complex due to the higher DCDC power supply frequency, meanwhile, the radio frequency antenna of the OBD adopts a built-in type, the built-in antenna is close to an interference source, particularly, harmonic frequency multiplication generated by the DCDC power supply has stronger interference on the low frequency band of a communication module GSM (global system for mobile communication or a second generation mobile phone system), so that the receiving sensitivity of frequency bands such as GSM850 is poor, the stability of connection with a base station is difficult to ensure under the condition of weak signals, and the problems of poor communication and data transmission continuity and the like easily occur.
At present, for the problem that the DCDC power supply interferes with the GSM low-frequency band, a shielding cover with good tightness is adopted or wave absorption is adopted to absorb the interference frequency band in the related technology. Because the GSM has extremely low receiving sensitivity power, electromagnetic interference can be conducted and emitted except space radiation, the metal shielding cover can only deal with the interference in the aspect of radiation, but the conduction has no good effect, and meanwhile, the wave-absorbing material has high cost and not ideal wave-absorbing efficiency, and has limited effect on the attenuation effect of the GSM850 low-frequency band, so the two schemes can not thoroughly improve the problem of the electromagnetic interference.
In view of this, how to improve the low-frequency band receiving sensitivity of the communication module GSM in the OBD, the problem of the DCDC power supply electromagnetic interference is a major concern for those skilled in the art.
Disclosure of Invention
In view of this, an object of the present application is to provide a method, a device, a vehicle-mounted device, and a readable storage medium for managing a power supply of a vehicle-mounted device, which implement intra-device electromagnetic compatibility through a novel power supply management scheme, solve the problem of poor receiving sensitivity caused by interference of a DCDC power supply on GSM, and improve the receiving sensitivity of GSM in a low frequency band, and the specific scheme is as follows:
in a first aspect, the application discloses a power management method for a vehicle-mounted device based on a computer device, wherein a DCDC power supply and an LDO power supply are connected in parallel to serve as a power module of the vehicle-mounted device, and the method comprises the following steps:
the communication module determines the network frequency band of the communication module;
if the network frequency band is switched to a low frequency band, controlling the power supply module to be powered by the LDO power supply;
and if the network frequency band is switched to a high frequency band, controlling the power module to be powered by the DCDC power supply.
Optionally, before controlling the power module to be powered by the LDO power supply, the method further includes:
determining the signal strength of a low frequency band;
judging whether the signal intensity is lower than a threshold value; wherein the threshold is determined according to the frequency band receiving sensitivity;
if yes, executing the step of controlling the power module to be powered by the LDO power supply;
if not, no operation is performed.
Optionally, if the network frequency band is switched to the high frequency band, and the power module is controlled to be powered by the DCDC power supply, the method further includes:
judging whether the power module is powered by the DCDC power supply;
if yes, no operation is performed;
and if not, executing the step of controlling the power module to be powered by the DCDC power supply.
Optionally, controlling the power module to be powered by the LDO power supply includes: sending a power supply starting instruction to the LDO power supply, and sending a power supply closing instruction to the DCDC power supply after a preset time interval so as to control the LDO power supply to supply power;
accordingly, controlling the power module to be powered by the DCDC power supply includes: and sending a power supply instruction to the DCDC power supply, starting the power supply instruction, and sending a power supply closing instruction to the LDO power supply after the preset time interval so as to control the DCDC power supply to supply power.
In a second aspect, the application discloses mobile unit power management device is applied to and connects DCDC power and LDO power in parallel, and as power module's mobile unit, the device includes:
the frequency band determining unit is used for determining the own network frequency band;
the first switching unit is used for controlling the power supply module to be powered by the LDO power supply if the network frequency band is switched to a low frequency band;
and the second switching unit is used for controlling the power module to be powered by the DCDC power supply if the network frequency band is switched to a high frequency band.
Optionally, the first switching unit further includes an intensity judgment subunit, where the intensity judgment subunit is configured to: determining a signal strength of a low frequency band before controlling the power module to be powered by the LDO power supply; judging whether the signal intensity is lower than a threshold value; wherein the threshold is determined according to the frequency band receiving sensitivity; if yes, triggering the first switching unit to execute the step of controlling the power supply module to be powered by the LDO power supply; if not, no operation is performed.
Optionally, the second switching unit further includes: the power supply judging subunit is used for judging whether the power supply module is powered by the DCDC power supply or not between the network frequency band is switched to a high frequency band and the DCDC power supply is used for controlling the power supply module to be powered by the DCDC power supply; if yes, no operation is performed; if not, triggering the second switching unit to execute the step of controlling the power module to be powered by the DCDC power supply.
Optionally, the first switching unit is specifically a first connection switching unit, and is configured to send a power supply starting instruction to the LDO power supply if the network frequency band is switched to a low frequency band, and send a power supply closing instruction to the DCDC power supply after a preset time interval, so as to control power supply of the LDO power supply;
correspondingly, the second switching unit is specifically a second engagement switching unit, configured to: and if the network frequency band is switched to a high frequency band, sending a power supply instruction to the DCDC power supply, starting the power supply instruction, and sending a power supply closing instruction to the LDO power supply after the preset time interval so as to control the DCDC power supply to supply power.
In a third aspect, the present application discloses an in-vehicle apparatus, comprising: the power supply module and the communication module are connected with the power supply module;
the power module comprises a DCDC power supply and an LDO power supply; the DCDC power supply is connected with the LDO power supply in parallel;
the communication module is used for realizing the following steps when executing a program: executing and determining the own network frequency band; if the network frequency band is switched to a low frequency band, controlling the power supply module to be powered by the LDO power supply; and if the network frequency band is switched to a high frequency band, controlling the power module to be powered by the DCDC power supply.
Optionally, when the communication module executes the sub-program, the following steps may be specifically implemented: determining the signal strength of a low frequency band; judging whether the signal intensity is lower than a threshold value; wherein the threshold is determined according to the frequency band receiving sensitivity; if yes, executing the step of controlling the power module to be powered by the LDO power supply; if not, no operation is performed.
Optionally, when the communication module executes the sub-program, the following steps may be specifically implemented: judging whether the power module is powered by the DCDC power supply; if yes, no operation is performed; and if not, executing the step of controlling the power module to be powered by the DCDC power supply.
Optionally, when the communication module executes the sub-program, the following steps may be specifically implemented: sending a power supply starting instruction to the LDO power supply, and sending a power supply closing instruction to the DCDC power supply after a preset time interval so as to control the LDO power supply to supply power; and sending a power supply instruction to the DCDC power supply, starting the power supply instruction, and sending a power supply closing instruction to the LDO power supply after the preset time interval so as to control the DCDC power supply to supply power.
In a fourth aspect, the present application discloses a readable storage medium having a program stored thereon, which when executed by a processor, performs the steps of: executing and determining the own network frequency band; if the network frequency band is switched to a low frequency band, controlling the power supply module to be powered by the LDO power supply; and if the network frequency band is switched to a high frequency band, controlling the power module to be powered by the DCDC power supply.
Optionally, when the sub-program stored in the readable storage medium is executed by the processor, the following steps may be specifically implemented: determining the signal strength of a low frequency band; judging whether the signal intensity is lower than a threshold value; wherein the threshold is determined according to the frequency band receiving sensitivity; if yes, executing the step of controlling the power module to be powered by the LDO power supply; if not, no operation is performed.
Optionally, when the sub-program stored in the readable storage medium is executed by the processor, the following steps may be specifically implemented: judging whether the power module is powered by the DCDC power supply; if yes, no operation is performed; and if not, executing the step of controlling the power module to be powered by the DCDC power supply.
Optionally, when the sub-program stored in the readable storage medium is executed by the processor, the following steps may be specifically implemented: sending a power supply starting instruction to the LDO power supply, and sending a power supply closing instruction to the DCDC power supply after a preset time interval so as to control the LDO power supply to supply power; and sending a power supply instruction to the DCDC power supply, starting the power supply instruction, and sending a power supply closing instruction to the LDO power supply after the preset time interval so as to control the DCDC power supply to supply power.
Therefore, in the vehicle-mounted device power management method provided by the application, when the communication module is switched to the low frequency band, the DCDC power supply is turned off, the LDO power supply supplies power to the communication module, the DCDC power supply stops working, the problem of interference of the DCDC power supply to the low frequency band of the communication module does not exist, meanwhile, the ripple rejection ratio of the LDO power supply is high, the vehicle-mounted device power management method is a linear voltage reduction device, the switching frequency does not exist, interference to an antenna of the communication module cannot be generated, and therefore high-efficiency stability of operation of the communication module can be guaranteed by power supply of the LD; when the communication module is switched to a high frequency band, in order to ensure efficient and stable power supply of the power module, the communication module is switched to a DCDC power supply with higher efficiency for power supply. Therefore, the method can effectively eliminate the interference of the DCDC power supply to the GSM low frequency of the communication module, effectively solve the problem of poor receiving sensitivity of the DCDC to the GSM low frequency band, also give consideration to the heating efficiency of the power supply, and ensure the long-term stable operation of the communication module and the power supply module.
The application also provides a vehicle-mounted device power management device, a vehicle-mounted device and a readable storage medium, which have the beneficial effects and are not repeated herein.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a flowchart illustrating an embodiment of a method for managing a power supply of a vehicle-mounted device according to the present disclosure;
FIG. 2 is a schematic diagram illustrating a connection between a power module and a communication module in a vehicle-mounted device according to the present disclosure;
fig. 3 is a block diagram of a power management device for an in-vehicle device according to the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application discloses a power management method for vehicle-mounted equipment, and referring to fig. 1, the execution main body of the method is a communication module in the vehicle-mounted equipment, and the method mainly comprises the following steps:
step S110: the communication module determines the network frequency band of the communication module;
the switching of network frequency channel is accomplished by communication module is inside by oneself, can obtain which kind of frequency channel has been switched to at present through the instruction, and then output and correspond the control model, does not do the restriction to the concrete implementation mode that communication module confirms self network frequency channel in this embodiment, can also receive the switching when the frequency channel switches and remind through the mode of initiatively sending the instruction inquiry, also can realize with other modes, no longer gives details here.
Step S120: if the network frequency band is switched to the low frequency band, the power supply module is controlled to be powered by the LDO power supply;
in the power management method provided in this embodiment, a DCDC power supply and an LDO power supply are connected in parallel to serve as a power module of a vehicle-mounted device, as shown in fig. 2, the DCDC power supply (in the figure, a DC-DC power supply) and the LDO power supply (in the figure, an LDO power supply) are connected in parallel to a communication module, the communication module is respectively connected to the two power modules, and the management of the power supply is realized by issuing a control signal. The embodiment of the application does not specifically limit the vehicle-mounted device, and includes but is not limited to vehicle-mounted OBD devices, vehicle-mounted lights, sound equipment, or each modular ECU.
When the DCDC power supply voltage reduction power supply works, interference frequency can be generated, the frequency multiplication of the interference frequency is close to the frequency bands of GSM850 and the like, and therefore co-frequency interference can occur. The LDO power supply is in a linear working mode, does not have switching frequency or interference frequency, and does not generate interference on the antenna. This application then is according to this characteristics, and communication module's power supply (power module) adopts DCDC power and LDO power to carry out the power supply that connects in parallel, when switching to GSM low frequency channel, controls DCDC power and LDO power switch, makes communication module power supply mode change the LDO power supply mode into by the DCDC power, can effectively eliminate the interference of DCDC power to the GSM low frequency, guarantees communication module's steady operation.
Step S130: and if the network frequency band is switched to a high frequency band, the power supply module is controlled to be powered by the DCDC power supply.
When the communication module is switched to a high frequency band, the interference frequency of the DCDC power supply does not generate interference on the high frequency band of the communication module at the moment; meanwhile, compared with a DCDC power supply, the LDO power supply has low efficiency and large heat productivity, the service life of OBD equipment can be prolonged due to long-term high temperature, and the working stability is influenced.
In an actual application scenario, the OBD device communication network includes a plurality of network systems 2G/3G/4G, generally, a high frequency band 4G is used, and the communication network is switched to a DCDC power supply mode during high frequency operation. When entering a mountainous area or having no 3G/4G signal coverage, the network can be switched to a 2G network, and at this time, if only a GSM850 frequency band is available and the signal is weak, the network can be switched to an LDO power supply to avoid the interference of a DCDC power supply to the GSM850 frequency band and improve the stability of the communication network, but the network can not exist for a long time, when the network returns to a 4G coverage area, the high frequency band is switched, the operation of the LDO power supply in a short time can not influence the OBD, and meanwhile, the electromagnetic interference can be avoided.
It should be noted that, the specific value setting of "high frequency" and "low frequency" provided in this embodiment is not limited, and may be set by referring to a standard, the 4G communication module supports network systems such as 2G, 3G, and 4G, and different network systems may be freely switched according to the current network environment, for example, GSM in a 2G network is divided into a 850 frequency band, a 900 frequency band, a 1800 frequency band, and a 1900 frequency band, where the 850 frequency band is low frequency, and in this embodiment, it may be considered that only the GSM850 frequency band in the 2G network is a low frequency band in all network systems. The 900 frequency band, 1800 frequency band and 1900 frequency band of GSM under other 2G network, all frequency bands including WCDMA, TD-SCDMA and CDMA2000 under 3G network, and all frequency bands including TDD-LTE and FDD-LTE under 4G network are high frequency band. In this embodiment, the specific determination criteria of the low frequency band and the high frequency band may be adaptively adjusted according to the applicable network type and the actual network signal strength, and the specific frequency band setting in this embodiment is not limited, and is only described by way of example.
Based on the above description, in the power management method for the vehicle-mounted device provided by this embodiment, when the communication module is switched to the low frequency band, the DCDC power is turned off, and the LDO power supplies power to the communication module, and the DCDC power stops working, so that the problem of interference of the DCDC power to the low frequency band of the communication module does not exist, and meanwhile, the ripple rejection ratio of the LDO power is high, and the DCDC power is a linear voltage reduction device, does not have switching frequency, and does not generate interference to the antenna of the communication module, so that the high-efficiency stability of the operation of the communication module can be ensured by supplying power; when the communication module is switched to a high frequency band, in order to ensure efficient and stable power supply of the power module, the communication module is switched to a DCDC power supply with higher efficiency for power supply. Therefore, the method can effectively eliminate the interference of the DCDC power supply to the GSM low frequency of the communication module, effectively solve the problem of poor receiving sensitivity of the DCDC to the GSM low frequency band, also give consideration to the heating efficiency of the power supply, and ensure the long-term stable operation of the communication module and the power supply module.
Based on the above embodiment, before the control power module is powered by the LDO power supply, the following steps may be further performed:
(1) determining the signal strength of a low frequency band;
(2) judging whether the signal intensity is lower than a threshold value; wherein, the threshold value is determined according to the frequency band receiving sensitivity;
(3) if yes, executing the step of controlling the power supply module to be powered by the LDO power supply;
(4) if not, the control power module is powered by the DCDC power supply.
After the communication module is switched to the low frequency band, the low frequency band signal intensity is preferentially judged, and if the low frequency band signal intensity is greater than a set value (threshold value), because the interference of the DCDC to the low frequency signal can be ignored at the moment, the DCDC can be kept to be used for supplying power to the communication module; if the voltage is lower than the set value, the communication module sends out a control signal to control the LDO power supply to supply power.
The threshold is determined according to the frequency band receiving sensitivity, and may also be further determined according to other use conditions (such as an operating time of the LDO power supply, etc.), which is not limited herein. For example, when the GSM850 band receiving sensitivity is lower than-87 dbm, the effect on normal transceiving is large, the threshold value may be set to-87 dbm, and when the GSM850 band receiving sensitivity is lower than-87 dbm, the LDO operating mode should be switched to.
Not only can reduce LDO power supply time as far as possible under this kind of mode, avoid the burden to the LDO power, also can reduce the electromagnetic interference in the mobile unit simultaneously, guarantee communication module's normal information receiving and dispatching. It should be noted that, if the low frequency is switched to the high frequency, the communication module may directly send a control signal to control the power switching without determining the current signal strength.
Under the above configuration, the communication module may be powered by the DCDC power supply when operating in the low frequency band, and in order to reduce the operation impact on the communication module itself caused by the power switching process and reduce the resource occupation caused by the power switching process, if the network frequency band is switched to the high frequency band, and the power module is controlled to be powered by the DCDC power supply, the following steps may be further performed:
(5) judging whether the power module is powered by a DCDC power supply;
(6) if yes, no operation is performed;
(7) and if not, executing the step of controlling the power supply module to be powered by the DCDC power supply.
By increasing the judgment before power switching, if the original low frequency uses DCDC power supply, switching is not needed, and the frequency of executing power switching can be reduced, so that unstable factors caused by power switching to OBD equipment operation are avoided, and stable operation of the equipment is ensured.
Further, because there is a delay of power-on response in the LDO power supply and the DCDC power supply, in order to avoid interruption of power supply to the vehicle-mounted device during power switching, the process of controlling the power supply module to supply power by the LDO power supply may specifically be: sending a power supply starting instruction to the LDO power supply, and sending a power supply closing instruction to the DCDC power supply after a preset time interval so as to control the LDO power supply to supply power;
the process of controlling the power supply module to be powered by the DCDC power supply may specifically be: and sending a power supply starting instruction to the DCDC power supply, and sending a power supply closing instruction to the LDO power supply after the interval preset time length so as to control the power supply of the DCDC power supply.
In the power supply switching process, the original power supply is closed after the power supply is switched for the preset time, so that the two power supplies can be smoothly connected.
The specific value setting of the preset duration is not limited, and may be set according to an empirical value, the starting time of different power supplies may be different, and it is found through statistics that the general starting time is generally smaller than 1ms, for example, the preset duration may be set to 1ms, and the setting of other preset durations may refer to the description of this embodiment, and will not be described herein again.
In the following, the vehicle-mounted device power management apparatus provided in the embodiment of the present application is introduced, and the vehicle-mounted device power management apparatus described below and the vehicle-mounted device power management method described above may be referred to correspondingly.
Fig. 3 is a block diagram of a power management apparatus for a vehicle-mounted device based on a computer device according to an embodiment of the present disclosure, and referring to fig. 3, the power management apparatus for a vehicle-mounted device according to the present disclosure is applied to a vehicle-mounted device in which a DCDC power supply and an LDO power supply are connected in parallel as a power module, and the apparatus may include:
the frequency band determining unit 210 is mainly used for determining the frequency band of the network itself;
the first switching unit 220 is mainly used for controlling the power supply module to be powered by the LDO power supply if the network frequency band is switched to the low frequency band;
the second switching unit 230 is mainly used for controlling the power module to be powered by the DCDC power supply if the network frequency band is switched to the high frequency band.
In some specific embodiments, the first switching unit 220 further includes an intensity determining subunit, where the intensity determining subunit is configured to: before the control power supply module is powered by the LDO power supply, determining the signal intensity of a low frequency band; judging whether the signal intensity is lower than a threshold value; wherein, the threshold value is determined according to the frequency band receiving sensitivity; if yes, triggering the first switching unit 220 to execute the step of controlling the power module to be powered by the LDO power supply; if not, no operation is performed.
In some specific embodiments, the second switching unit 230 further includes: the power supply judging subunit is used for judging whether the power supply module is powered by the DCDC power supply or not between the network frequency band is switched to the high frequency band and the DCDC power supply is used for controlling the power supply module to be powered by the DCDC power supply; if yes, no operation is performed; if not, the second switching unit 230 is triggered to execute the step of controlling the power module to be powered by the DCDC power supply.
In some specific embodiments, the first switching unit 220 is specifically a first engagement switching unit, and is configured to send a power supply starting instruction to the LDO power supply if the network frequency band is switched to the low frequency band, and send a power supply closing instruction to the DCDC power supply after a preset time interval, so as to control power supply of the LDO power supply;
accordingly, the second switching unit 230 is specifically a second engagement switching unit, configured to: and if the network frequency band is switched to the high frequency band, sending a power supply instruction to the DCDC power supply, starting the power supply instruction, and sending a power supply closing instruction to the LDO power supply after the preset time interval so as to control the DCDC power supply to supply power.
Further, this application embodiment still discloses a mobile unit, and the mobile unit in this embodiment mainly includes: the power supply module and the communication module connected with the power supply module.
The power module comprises a DCDC power supply and an LDO power supply; the DCDC power supply is connected with the LDO power supply in parallel;
a communication module for implementing the following steps when executing a program: executing and determining the own network frequency band; if the network frequency band is switched to the low frequency band, the power supply module is controlled to be powered by the LDO power supply; and if the network frequency band is switched to a high frequency band, the power supply module is controlled to be powered by the DCDC power supply.
For a specific power module, the connection between the DCDC power supply and the LDO power supply and the communication module can be referred to fig. 2 and related descriptions, and will not be described herein again.
In this embodiment, when the communication module executes the subprogram, the following steps may be specifically implemented: determining the signal strength of a low frequency band; judging whether the signal intensity is lower than a threshold value; wherein, the threshold value is determined according to the frequency band receiving sensitivity; if yes, executing the step of controlling the power supply module to be powered by the LDO power supply; if not, no operation is performed.
In this embodiment, when the communication module executes the subprogram, the following steps may be specifically implemented: judging whether the power module is powered by a DCDC power supply; if yes, no operation is performed; and if not, executing the step of controlling the power supply module to be powered by the DCDC power supply.
In this embodiment, when the communication module executes the subprogram, the following steps may be specifically implemented: sending a power supply starting instruction to the LDO power supply, and sending a power supply closing instruction to the DCDC power supply after a preset time interval so as to control the LDO power supply to supply power; and sending a power supply starting instruction to the DCDC power supply, and sending a power supply closing instruction to the LDO power supply after the interval preset time length so as to control the power supply of the DCDC power supply.
The steps in the vehicle-mounted device power management method described above may be implemented by the structure of the vehicle-mounted device provided in the present embodiment.
Further, an embodiment of the present application further discloses a readable storage medium, where a program is stored on the readable storage medium, and when the program is executed by a processor, the program implements the following steps: executing and determining the own network frequency band; if the network frequency band is switched to the low frequency band, the power supply module is controlled to be powered by the LDO power supply; and if the network frequency band is switched to a high frequency band, the power supply module is controlled to be powered by the DCDC power supply.
In some specific embodiments, the sub-program stored in the readable storage medium, when executed by the processor, may implement the following steps: determining the signal strength of a low frequency band; judging whether the signal intensity is lower than a threshold value; wherein, the threshold value is determined according to the frequency band receiving sensitivity; if yes, executing the step of controlling the power supply module to be powered by the LDO power supply; if not, no operation is performed.
In some specific embodiments, the sub-program stored in the readable storage medium, when executed by the processor, may implement the following steps: judging whether the power module is powered by a DCDC power supply; if yes, no operation is performed; and if not, executing the step of controlling the power supply module to be powered by the DCDC power supply.
In some specific embodiments, the sub-program stored in the readable storage medium, when executed by the processor, may implement the following steps: sending a power supply starting instruction to the LDO power supply, and sending a power supply closing instruction to the DCDC power supply after a preset time interval so as to control the LDO power supply to supply power; and sending a power supply starting instruction to the DCDC power supply, and sending a power supply closing instruction to the LDO power supply after the interval preset time length so as to control the power supply of the DCDC power supply.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The method, the device, the vehicle-mounted device and the readable storage medium for vehicle-mounted device power management based on the diagnostic server provided by the present application are introduced in detail, and a specific example is applied in the description to explain the principle and the implementation of the present application, and the description of the above embodiment is only used to help understanding the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A vehicle-mounted equipment power supply management method is characterized in that a direct current converter (DCDC) power supply and a low dropout regulator (LDO) power supply are connected in parallel to be used as a power supply module of the vehicle-mounted equipment, and the method comprises the following steps:
the communication module determines the network frequency band of the communication module;
if the network frequency band is switched to a low frequency band, controlling the power supply module to be powered by the LDO power supply;
and if the network frequency band is switched to a high frequency band, controlling the power module to be powered by the DCDC power supply.
2. The method for vehicle device power management according to claim 1, further comprising, before controlling the power module to be powered by the LDO power supply:
determining the signal strength of a low frequency band;
judging whether the signal intensity is lower than a threshold value; wherein the threshold is determined according to the frequency band receiving sensitivity;
if yes, executing the step of controlling the power module to be powered by the LDO power supply;
if not, no operation is performed.
3. The method for managing the power supply of the vehicle-mounted device according to claim 2, wherein, between the step of controlling the power module to be powered by the DCDC power supply and the step of switching the network frequency band to the high frequency band, the method further comprises:
judging whether the power module is powered by the DCDC power supply;
if yes, no operation is performed;
and if not, executing the step of controlling the power module to be powered by the DCDC power supply.
4. The method for vehicle device power management according to claim 1, wherein controlling the power module to be powered by the LDO power supply comprises: sending a power supply starting instruction to the LDO power supply, and sending a power supply closing instruction to the DCDC power supply after a preset time interval so as to control the LDO power supply to supply power;
accordingly, controlling the power module to be powered by the DCDC power supply includes: and sending a power supply instruction to the DCDC power supply, starting the power supply instruction, and sending a power supply closing instruction to the LDO power supply after the preset time interval so as to control the DCDC power supply to supply power.
5. The utility model provides an on-vehicle equipment communication module which characterized in that, is applied to parallelly connected DCDC power and LDO power, as the on-vehicle equipment of power module, the device includes:
the frequency band determining unit is used for determining the own network frequency band;
the first switching unit is used for controlling the power supply module to be powered by the LDO power supply if the network frequency band is switched to a low frequency band;
and the second switching unit is used for controlling the power module to be powered by the DCDC power supply if the network frequency band is switched to a high frequency band.
6. The in-vehicle device power management apparatus according to claim 5, wherein the first switching unit further includes an intensity determination subunit configured to: determining a signal strength of a low frequency band before controlling the power module to be powered by the LDO power supply; judging whether the signal intensity is lower than a threshold value; wherein the threshold is determined according to the frequency band receiving sensitivity; if yes, triggering the first switching unit to execute the step of controlling the power supply module to be powered by the LDO power supply; if not, no operation is performed.
7. The in-vehicle device power management apparatus according to claim 6, wherein the second switching unit further includes: the power supply judging subunit is used for judging whether the power supply module is powered by the DCDC power supply or not between the network frequency band is switched to a high frequency band and the DCDC power supply is used for controlling the power supply module to be powered by the DCDC power supply; if yes, no operation is performed; if not, triggering the second switching unit to execute the step of controlling the power module to be powered by the DCDC power supply.
8. The power management device of claim 5, wherein the first switching unit is specifically a first connection switching unit, and configured to send a power starting instruction to the LDO power supply if the network frequency band is switched to a low frequency band, and send a power closing instruction to the DCDC power supply after a preset time interval to control power supply of the LDO power supply;
correspondingly, the second switching unit is specifically a second engagement switching unit, configured to: and if the network frequency band is switched to a high frequency band, sending a power supply instruction to the DCDC power supply, starting the power supply instruction, and sending a power supply closing instruction to the LDO power supply after the preset time interval so as to control the DCDC power supply to supply power.
9. An in-vehicle apparatus, characterized by comprising: the power supply module and the communication module are connected with the power supply module;
the power module comprises a DCDC power supply and an LDO power supply; the DCDC power supply is connected with the LDO power supply in parallel;
the communication module is used for realizing the following steps when executing a program: executing and determining the own network frequency band; if the network frequency band is switched to a low frequency band, controlling the power supply module to be powered by the LDO power supply; and if the network frequency band is switched to a high frequency band, controlling the power module to be powered by the DCDC power supply.
10. A readable storage medium, characterized in that the readable storage medium has stored thereon a program that, when executed by a processor, realizes the steps of the in-vehicle apparatus power management method according to any one of claims 1 to 4.
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