CN103164877B - Vehicle-mounted terminal and power management method of vehicle-mounted terminal - Google Patents
Vehicle-mounted terminal and power management method of vehicle-mounted terminal Download PDFInfo
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- CN103164877B CN103164877B CN201110415388.8A CN201110415388A CN103164877B CN 103164877 B CN103164877 B CN 103164877B CN 201110415388 A CN201110415388 A CN 201110415388A CN 103164877 B CN103164877 B CN 103164877B
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Abstract
The application provides a vehicle-mounted terminal and a power management method of the vehicle-mounted terminal, wherein the vehicle-mounted terminal comprises a CPU and a radio frequency module, the radio frequency module comprises a wake-up circuit used for waking up the vehicle-mounted terminal from a sleep state to a working state, and the vehicle-mounted terminal further comprises: the motion sensing module is used for sensing the motion or the stop of the vehicle, outputting a notification signal to the CPU when sensing the motion of the vehicle, and not outputting the signal to the CPU when sensing the stop of the vehicle; the CPU includes: the signal detection module is used for detecting whether a notification signal of the motion sensing module is received or not in a dormant state of the sent vehicle-mounted terminal; the power supply cutting-off module is used for cutting off the power supply of the wake-up circuit when the notification signal from the motion sensing module is not received; and the power supply starting module is used for starting the power supply of the wake-up circuit when receiving the notification signal of the motion sensing module. This application can reduce OBU power consumption under the dormant state, prolongs OBU's life.
Description
Technical field
The application relates to technical field of intelligent traffic, particularly relates to the method for managing power supply of a kind of car-mounted terminal and car-mounted terminal.
Background technology
(car-mounted terminal, On board Unit are that one is put onboard to OBU, are used for and the microwave equipment of RSU (roadside unit, Road-Side Unit) communication of roadside erection.Such as, in ETC (electric non-stop toll, Electronic Toll Collection System) system, RSU is arranged on charge station side, is responsible for carrying out radio communication between OBU; OBU is arranged on the vehicle of enforcement, and this electronic data of electronic data having one group of user modifiable, not unique in OBU is as the unique identification of OBU, and it is bound with the vehicle of user; Like this, RSU reads electronic data, can obtain the information of vehicle, realizes the information interaction between vehicle and charge station under wireless mode.
With reference to Fig. 1, show the structural representation of a kind of OBU of prior art, wherein, radio-frequency module is used for the wireless receiving and dispatching of data, and LCD MODULE is for showing the information of some OBU, and card reading module is for reading the data in user smart card, communication module is mainly used in by data line and PC (personal computer, Personal Computer) carry out data exchange, CPU is then responsible for controlling and data processing every other module, and control here mainly comprises Energy control.
In order to reach power saving object, CPU makes OBU shown in Fig. 1 have dormant state and duty two states by Energy control.Wherein, in the dormant state, part in radio-frequency module except wake-up circuit and the power supply of LCD MODULE are cut off by CPU, wake-up circuit in radio-frequency module, card reading circuit and communication module are by CPU normal power supply, also be, wake-up circuit in radio-frequency module can normally work, and card reading module and communication module also can send look-at-me and be waken up by CPU; Like this, when RSU launches wake-up signal, plug-in card or data line insertion communication port, wake-up circuit, card reading module or communication module can both wake CPU up, by Energy control, OBU is switched to duty by CPU, descend part in radio-frequency module except wake-up circuit and LCD MODULE by CPU normal power supply in working order; And when CPU processes the transaction of OBU and RSU, Card Reader or the data exchange with PC, and after finding out and not having ensuing work, CPU initiatively can get back to dormant state.
OBU shown in Fig. 1 saves the electricity that CPU expends in the dormant state, but in order to CPU being waken up, even if wake-up circuit also needs to be kept on all in the dormant state, this makes OBU power consumption in the dormant state substantially at about 10 microamperes.And the life of product of OBU is relevant to service time of battery, in general, service time of battery is longer, and life of product is longer.
In a word, the technical matters needing those skilled in the art urgently to solve is exactly: the power consumption that how can reduce OBU, thus extends the serviceable life of OBU.
Summary of the invention
Technical problems to be solved in this application are to provide the method for managing power supply of a kind of car-mounted terminal and car-mounted terminal, can reduce OBU power consumption in the dormant state, thus extend the serviceable life of OBU.
In order to solve the problem, this application discloses a kind of car-mounted terminal, comprise CPU and radio-frequency module, described radio-frequency module comprises the wake-up circuit for car-mounted terminal to be waken up to duty from dormant state further, and described car-mounted terminal also comprises:
Movement sensing module, for motion or the stopping of perception vehicle, and when the motion perceiving vehicle, to CPU output notice signal, when the stopping perceiving vehicle, does not output signal to CPU;
Described CPU comprises:
Signal detection module, under the dormant state of issuing car-mounted terminal, detects the notification signal whether received from described movement sensing module;
Module is cut off in power supply, for when not receiving the notification signal from described movement sensing module, cuts off the power supply of described wake-up circuit; And
Power supply opening module, for when receiving the notification signal from described movement sensing module, opens the power supply of described wake-up circuit.
Preferably, described movement sensing module is three axle acceleration sensors, this three axles acceleration sensor is used for the change in gravitational acceleration of perception place vehicle X, Y, Z tri-axis, and when in X, Y, Z tri-axis, change in gravitational acceleration occurs for one or more, send look-at-me to CPU, this look-at-me is notification signal.
Preferably, described look-at-me is the notification signal of high level, and when not receiving the notification signal from described movement sensing module, the pin of CPU is high;
Described signal detection module, also for when detection receives the notification signal of high level, drags down the pin of CPU.
Preferably, described car-mounted terminal also comprises: signal processing circuit, is connected between described movement sensing module and CPU, carries out filtering process for the notification signal exported described movement sensing module, and to the notification signal after CPU output filtering; The pulse signal that described filtering process stops the duration short passes through, the notification signal of clearance high level;
Now, described signal detection module, specifically under the dormant state of issuing car-mounted terminal, detects the filtered notification signal whether received from described signal processing circuit;
Module is cut off in described power supply, specifically for when not receiving the filtered notification signal from described signal processing circuit, cuts off the power supply of described wake-up circuit;
Described power supply opening module, specifically for when receiving the filtered notification signal from described signal processing circuit, opens the power supply of described wake-up circuit.
Preferably, described signal processing circuit comprises: input end (IN), the first electric capacity (C1), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4) and triode (Q1), and output terminal (OUT);
Wherein, one end, shunt circuit ground connection that described first electric capacity (C1) and the first resistance (R1) form, the other end connects described movement sensing module by input end (IN), and the notification signal for exporting described movement sensing module carries out the process of filtering stabilization;
Second resistance (R2) is connected with described shunt circuit with one end of the 3rd resistance (R3), the other end is connected with triode (Q1), and the notification signal after the process of filtering stabilization is carried out dividing potential drop and exports to triode (Q1) by the second resistance (R2) and the 3rd resistance (R3);
When triode (Q1) conducting, it passes through output terminal (OUT) to the notification signal after CPU output filtering;
One termination power (VCC) of the 4th resistance (R4), another termination triode (Q1) and output terminal (OUT).
Preferably, described signal detection module, specifically under the dormant state of issuing car-mounted terminal, the notification signal whether received from described movement sensing module is detected at interval to schedule.
On the other hand, disclosed herein as well is a kind of method for managing power supply of car-mounted terminal, described car-mounted terminal comprises CPU and radio-frequency module, and described radio-frequency module comprises the wake-up circuit for car-mounted terminal to be waken up to duty from dormant state further, and described method comprises:
The motion of perception vehicle or stopping, and when the motion perceiving vehicle, to CPU output notice signal, when the stopping perceiving vehicle, do not output signal to CPU;
Under the dormant state of issuing car-mounted terminal, detect whether receive described notification signal;
When not receiving from described notification signal, cut off the power supply of described wake-up circuit;
When receiving described notification signal, open the power supply of described wake-up circuit.
Preferably, the described motion of perception vehicle or the step of stopping, comprising:
Adopt the change in gravitational acceleration of three axle acceleration sensor perception place vehicle X, Y, Z, tri-axis;
When in X, Y, Z tri-axis, change in gravitational acceleration occurs for one or more, send look-at-me to CPU, this look-at-me is notification signal.
Preferably, described look-at-me is the notification signal of high level, and when not receiving the notification signal from described movement sensing module, the pin of CPU is high;
Described method also comprises: when detection receives the notification signal of high level, drag down the pin of CPU.
Preferably, described method also comprises: carry out filtering process to the notification signal that described movement sensing module exports, and to the notification signal after CPU output filtering; The pulse signal that described filtering process stops the duration short passes through, the notification signal of clearance high level;
Now, the step whether described detection receives described notification signal is specially, and under the dormant state of issuing car-mounted terminal, detects the filtered notification signal whether received from described signal processing circuit;
The step of the power supply of the described wake-up circuit of described cut-out is specially, and when not receiving the filtered notification signal from described signal processing circuit, cuts off the power supply of described wake-up circuit;
The step of the power supply of the described wake-up circuit of described unlatching is specially, and when receiving the filtered notification signal from described signal processing circuit, opens the power supply of described wake-up circuit.
Compared with prior art, the application has the following advantages:
Working relative to prior art wake-up circuit under the dormant state of OBU always, the wake-up circuit of the application quits work when vehicle stops, and the circuit of the motion of perception vehicle or stopping only need expending the electricity of general 2 microamperes, therefore, under the dormant state of OBU, the electricity of about 10 microamperes is expended relative to prior art wake-up circuit, itself can greatly reduce OBU power consumption in the dormant state, thus effectively extend the serviceable life of OBU.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of OBU of prior art;
Fig. 2 is the structural drawing of a kind of car-mounted terminal embodiment 1 of the application;
Fig. 3 is the pin schematic diagram of a kind of MMA8452 chip of the application;
Fig. 4 is the structural drawing of a kind of car-mounted terminal embodiment 2 of the application;
Fig. 5 is the circuit structure diagram of a kind of signal processing circuit of the application;
Fig. 6 is the structural drawing of a kind of car-mounted terminal embodiment 3 of the application;
Fig. 7 is the process flow diagram of the method for managing power supply embodiment of a kind of car-mounted terminal of the application.
Embodiment
For enabling above-mentioned purpose, the feature and advantage of the application more become apparent, below in conjunction with the drawings and specific embodiments, the application is described in further detail.
Unless by during charge station by RSU wake up carry out concluding the business, plug-in card or data line insert communication port, OBU is in dormant state in the application always, and also, the wake-up circuit in the radio-frequency module of usual OBU only carries out Shi Caihui at OBU by charge station and uses.But in the dormant state, the wake-up circuit in the radio-frequency module of OBU needs to be kept on all, and the power consumption of this part is substantially at about 10 microamperes.Visible, except OBU to carry out the situation of concluding the business by charge station except, wake-up circuit is inoperative, and it is opened is a kind of waste.But do not have that other prior art such as common practise, customary means is open or implicit determines when OBU needs to be concluded the business by charge station, when also do not provide OBU needs to carry out the related law of concluding the business by charge station.
Present inventor finds under study for action, and when OBU is concluded the business by charge station, vehicle must be motion, also, when vehicle movement, likely uses wake-up circuit; And when vehicle stops, certainly can not wake-up circuit be used.
One of core idea of the embodiment of the present application is, the motion of perception vehicle or stopping, and when the motion perceiving vehicle, to CPU output notice signal, when the stopping perceiving vehicle, does not output signal to CPU; Like this, CPU just when not receiving the notification signal from described movement sensing module, can cut off the power supply of described wake-up circuit, and, when receiving the notification signal from described movement sensing module, open the power supply of described wake-up circuit.Due under the dormant state of OBU, wake-up circuit can not power consumption when vehicle stops, and the circuit of the motion of perception vehicle or stopping only need expending the electricity of general 2 microamperes, therefore, under the dormant state of OBU, the electricity of about 10 microamperes is expended relative to prior art wake-up circuit, itself can greatly reduce OBU power consumption in the dormant state, extend the serviceable life of OBU.
With reference to Fig. 2, show the structural drawing of a kind of car-mounted terminal embodiment 1 of the application, it specifically can comprise CPU 201 and radio-frequency module 202, described radio-frequency module 202 may further include the wake-up circuit 221 for car-mounted terminal to be waken up to duty from dormant state, and described car-mounted terminal can also comprise:
Movement sensing module 203, for motion or the stopping of perception vehicle, and when the motion perceiving vehicle, to CPU 201 output notice signal, when the stopping perceiving vehicle, does not output signal to CPU 201;
Described CPU 201 specifically can comprise:
Signal detection module 211, under the dormant state of issuing car-mounted terminal, detects the notification signal whether received from described movement sensing module;
Module 212 is cut off in power supply, for when not receiving the notification signal from described movement sensing module, cuts off the power supply of described wake-up circuit 221; And
Power supply opening module 213, for when receiving the notification signal from described movement sensing module, opens the power supply of described wake-up circuit 221.
The application can be applied to various OBU, in order to reduce OBU power consumption in the dormant state, thus extends the serviceable life of OBU.
In actual applications, OBU is placed on vehicle, the motion of the movement sensing module 203 perception vehicle of OBU or stopping.In a preferred embodiment of the present application, described movement sensing module can be three axle acceleration sensors, this three axles acceleration sensor can be used for the change in gravitational acceleration of perception place vehicle X, Y, Z tri-axis, and when in X, Y, Z tri-axis, change in gravitational acceleration occurs for one or more, send look-at-me to CPU, this look-at-me is notification signal.
In specific implementation, gravity sensing chip can be adopted to realize the function of this three axles acceleration sensor, and the model of the gravity sensing chip in reality can comprise MMA8452, MMA7455, MMA8450 etc.Such as, with reference to Fig. 3, show the pin schematic diagram of a kind of MMA8452 chip of the application, whether, when vehicle is in halted state, MMA8452 is in the duty of low-power consumption, move in sense vehicle always, once sense that in X, Y, Z tri-axis, change in gravitational acceleration occurs for one or more, then think that vehicle is in acceleration or vibrations, so, export a look-at-me by pin 11 to CPU.
In another preferred embodiment of the present application, described look-at-me is the notification signal of high level, and at ordinary times when not receiving the notification signal from described movement sensing module, the pin of CPU is high; Now, described signal detection module 211, is also used in and detects when receiving the notification signal of high level, drag down the pin of CPU, namely gives CPU look-at-me, and notice power supply opening module 213 opens the power supply of wake-up circuit 221.
It should be noted that, signal detection module 211 in CPU 201, power supply cut off the module such as module 212, power supply opening module 213 and should work issuing in OBU, for not issuing OBU, then think that CPU does not possess the effect of the modules such as signal detection module 211, power supply cut-out module 212, power supply opening module 213, also be, the application carrys out managing electrical power under the dormant state of OBU scheme by cutting off or open wake-up circuit 221 only can be applicable to issue OBU, inapplicable for not issuing OBU.Here distribution mainly refers to that the information initializing of OBU is responsible in OBU issue center, comprise loading secrete key, writing system information and user's information of vehicles in 0BU, this electronic data of electronic data making to have in OBU one group of user modifiable, not unique is as the unique identification of OBU, the vehicle of OBU and user is bound, due to the known technology be distributed as in this area of OBU, and therefore not to repeat here.
In a preferred embodiment of the present application, described signal detection module 211, can specifically under the dormant state of issuing car-mounted terminal, and the notification signal whether received from described movement sensing module 203 is detected at interval to schedule.
Here predetermined time interval can be arranged according to actual conditions by those skilled in the art, and the numerical value of described predetermined time interval can be 1 minute, 2 minutes even 10 minutes, 20 minutes etc.Such as, if do not receive the notification signal from described movement sensing module in a upper predetermined time interval, then think that vehicle is in halted state, therefore the power supply that module 212 has cut off wake-up circuit 221 is cut off in power supply, suppose that vehicle is concluded the business to charge station from halted state to motion state again and need the longer time interval, then can predetermined time interval be arranged more greatly, as 10 minutes etc., otherwise, if vehicle is concluded the business to charge station from halted state to motion state again need the shorter time interval, then can predetermined time interval be arranged a little bit smaller, as 2 minutes etc., and for example, if have received the notification signal from described movement sensing module in a upper predetermined time interval, then think that vehicle is kept in motion, therefore power supply opening module 213 opens the power supply of wake-up circuit 221, suppose that vehicle is concluded the business from motion state to charge station and need the longer time interval to halted state again to motion state again, then can predetermined time interval be arranged more greatly, as 20 minutes etc., otherwise, if vehicle is concluded the business from motion state to charge station need the shorter time interval to halted state again to motion state again, then can predetermined time interval be arranged a little bit smaller, as 5 minutes etc.In a word, those skilled in the art can arrange the predetermined time interval of detection according to actual conditions, the application is not limited concrete set-up mode.
For making those skilled in the art understand the application better, below describing the workflow of car-mounted terminal shown in Fig. 2, specifically can comprise:
Step 1, signal detection module 211 are under the dormant state of issuing car-mounted terminal, and the notification signal whether received from described movement sensing module 203 is detected at interval to schedule;
If the testing result of step 2 signal detection module 211 shows, movement sensing module 203 does not provide notification signal and informs that vehicle at the volley, then the power supply that module 212 can cut off described wake-up circuit 221 is cut off in power supply; In such cases, the power consumption of OBU is very little, the electricity of 2 milliamperes that substantially only have movement sensing module 203 to expend;
Step 3, when vehicle sparking after, vehicle has slight vibrations, and now movement sensing module 203 detects the motion of vehicle, and sends a notification signal to CPU;
Step 4, signal detection module 211 detect the notification signal from movement sensing module 203, so power supply opening module 213 opens the power supply of described wake-up circuit 221; OBU is in the dormant state that can work, by carrying out communication transaction with regard to energy and RSU during charge station.
With reference to Fig. 4, show the structural drawing of a kind of car-mounted terminal embodiment 2 of the application, it specifically can comprise CPU 401 and radio-frequency module 402, described radio-frequency module 402 may further include the wake-up circuit 421 for car-mounted terminal to be waken up to duty from dormant state, and described car-mounted terminal can also comprise:
Movement sensing module 403, for motion or the stopping of perception vehicle, and when the motion perceiving vehicle, to CPU 401 output notice signal, when the stopping perceiving vehicle, does not output signal to CPU 401;
Signal processing circuit 404, is connected between described movement sensing module 403 and CPU 401, carries out filtering process for the notification signal exported described movement sensing module 403, and to the notification signal after CPU 401 output filtering; The pulse signal that described filtering process stops the duration short passes through, the notification signal of clearance high level;
Described CPU 401 specifically can comprise:
Signal detection module 411, specifically under the dormant state of issuing car-mounted terminal, detects the filtered notification signal whether received from described signal processing circuit 404;
Module 412 is cut off in power supply, specifically for when not receiving the filtered notification signal from described signal processing circuit 404, cuts off the power supply of described wake-up circuit 421; And
Power supply opening module 413, specifically for when receiving the filtered notification signal from described signal processing circuit 404, opens the power supply of described wake-up circuit 421.
When vehicle is in parking period, people or object touching vehicle or switch gate all likely cause movement sensing module 403 to perceive the motion of vehicle and signal of giving notice, and CPU can open the power supply of wake-up circuit 421 after notified signal.Although subsequent time, movement sensing module 403 perceives the static signal of no longer giving notice of vehicle, CPU also can the power supply of corresponding cut-out wake-up circuit 421, but, the frequent generation of people or object touching vehicle or switch gate can cause frequent unlatching or the closedown of wake-up circuit 421, thus affects the serviceable life of OBU.
Present inventor notices, the notification signal that the motion of people or object touching vehicle or the notification signal that causes of switch gate and vehicle causes has one and distinguishes, that the former normally short level signal pulse signal that also namely the duration is short, duration short pulse signal filters out by signal transacting.
The key distinction of the present embodiment and embodiment 1 is, the notification signal adopting signal processing circuit 404 pairs of movement sensing module 403 to export carries out filtering process, and to the notification signal after CPU 401 output filtering; The pulse signal that the duration can be stoped short due to described filtering process passes through, the notification signal of clearance high level, like this, the notification signal that people or object touching vehicle or switch gate just can be stoped to cause passes through, frequent unlatching or the closedown of the frequent wake-up circuit 421 caused of people or object touching vehicle or switch gate can be avoided, thus effectively can affect the serviceable life of OBU.
With reference to Fig. 5, show the circuit structure diagram of a kind of signal processing circuit of the application, it specifically can comprise: input end IN, the first electric capacity C1, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4 and triode Q1, and output terminal OUT;
Wherein, one end, shunt circuit ground connection that described first electric capacity C1 and the first resistance R1 forms, the other end connects described movement sensing module 403 by input end IN, and the notification signal for exporting described movement sensing module carries out the process of filtering stabilization;
Second resistance R2 is connected with described shunt circuit with one end of the 3rd resistance R3, and the other end is connected with triode Q1, and the notification signal after the process of filtering stabilization is carried out dividing potential drop and exports to triode Q1 by the second resistance R2 and the 3rd resistance R3;
When triode Q1 conducting, it passes through output terminal OUT to the notification signal after CPU 401 output filtering;
The one termination power VCC of the 4th resistance R4, another termination triode Q1 and output terminal OUT.
The effect of signal processing circuit is exactly some clutters of filtering and spiking.When the vehicle is stopped, some people is clashed into or touching vehicle or switch gate can cause the motion detecting vehicle in short-term of movement sensing module, and the look-at-me provided.By can be good at these look-at-mes of filtering waking up CPU to the setting of R1, R2, R3, R4 and C1 size in signal processing circuit, reducing wake-up circuit unnecessary unlatching in these cases or closedown, thus avoiding the serviceable life affecting OBU.
Such as, when vehicle is clashed into (such as being kicked by people) by people, movement sensing module also may can perceive the change of acceleration of gravity, and this process is a quite short time, so movement sensing module can export the very short pulse of time.This pulse is through C1, charge to C1, this pulse electricity behind the shunt circuit that C1 and R1 forms is let go, like this, during level when look-at-me neither one is stablized long, C1 upper just can not be stable maintenance voltage, R2, the on-off circuit of R3 and Q1 composition can not be opened, and the pin of CPU just keeps original high level.Can not interrupt to CPU.Therefore, signal processing circuit shown in Fig. 5 can some clutters of filtering and spiking.
In practice, C1 can be set and use larger electric capacity as 1uF electric capacity, the electric capacity that R1 adopts 10k can be set; The look-at-me dividing potential drop provided by movement sensing module due to R2 and R3 is supplied to triode, make triode ON, on triode, voltage preferably maintains about 1V, therefore R2 and R3 resistance probably can be decided to be R2 is 220k, R3 is 100k, when using the power voltage supply of 3.3v, being about 1V to the voltage of transistor base, making triode can not leak through some next level to opening conducting because of Anti-shaking circuit; For reducing the power consumption of OBU, the value of R4 can be a little bigger, such as about 1M.In a word, the setting of above-mentioned R1, R2, R3, R4 and C1 size is only exemplarily, and those skilled in the art can arrange other size according to actual needs, and the application is not limited this.
It should be noted that, just exemplarily, in fact, Fig. 5 also can adopt the triode of PNP form to the triode of the NPN form shown in Fig. 5, and the application is not limited it.
With reference to Fig. 6, show the structural drawing of a kind of car-mounted terminal embodiment 3 of the application, it specifically can comprise CPU 601, radio-frequency module 602, LCD MODULE 603, card reading module 604, communication module 605 and movement sensing module 606;
Wherein, described radio-frequency module 602, for the wireless receiving and dispatching of data, may further include the wake-up circuit 221 for car-mounted terminal to be waken up to duty from dormant state;
Described LCD MODULE 603, for showing the information of some OBU;
Described card reading module 604, for reading the data in user smart card;
Described communication module 605, for carrying out data exchange by data line and PC;
Described movement sensing module 606, for motion or the stopping of perception vehicle, and when the motion perceiving vehicle, to CPU 601 output notice signal, when the stopping perceiving vehicle, does not output signal to CPU 601;
Described CPU 601, primary responsibility controls and data processing every other module, and control here comprises Energy control, specifically can comprise:
Signal detection module 611, under the dormant state of issuing car-mounted terminal, detects the notification signal whether received from described movement sensing module;
Module 612 is cut off in power supply, for when not receiving the notification signal from described movement sensing module, cuts off the power supply of described wake-up circuit 621; And
Power supply opening module 613, for when receiving the notification signal from described movement sensing module, opens the power supply of described wake-up circuit 621.
OBU shown in Fig. 6 still has dormant state and duty two states;
Wherein, in the dormant state, the power supply of the part in radio-frequency module 602 except wake-up circuit 621 and LCD MODULE 603 is cut off by CPU 601, card reading circuit 604 and communication module 605 are by CPU601 normal power supply, when vehicle is in halted state, the power supply of wake-up circuit 621 is cut off, and when vehicle is kept in motion, the power supply of wake-up circuit 621 is unlocked;
In working order, the part in radio-frequency module 602 except wake-up circuit 621 and LCD MODULE 603 are all by CPU 601 normal power supply.
Under the dormant state of OBU, if vehicle is in halted state, wake-up circuit 621 is cisco unity malfunctions, plug-in card or data line insert communication port still can wake the duty being in Card Reader or data exchange up by OBU, but OBU can not wake up by the wake-up signal that RSU sends to conclude the business.Once in motion sensing module 606 perceives the motion of vehicle, a notification signal will be provided and tell CPU601 vehicle movement, now CPU 601 understands the confession electric-opening of wake-up circuit 621, but O B U is still in dormant state, but OBU is now identical with OBU when not having movement sensing module 606, the wake-up signal wakes that can be sent by RSU.Once in motion sensing module 606 perceives the stopping of vehicle, will provide a notification signal and tell CPU 601 vehicle movement, and now the power supply of wake-up circuit 621 can be cut off by CPU 601.
In a word, relative to prior art under the dormant state of OBU, wake-up circuit is working always, the wake-up circuit of the application quits work when vehicle stops, because movement sensing module power consumption in the dormant state (2 milliamperes) is generally less than the power consumption (10 milliamperes) of wake-up circuit, therefore, the application can save the power consumption of the wake-up circuit when vehicle stops, and effectively improves the serviceable life of OBU.
Corresponding to preceding method embodiment, present invention also provides a kind of method for managing power supply of car-mounted terminal, described car-mounted terminal specifically comprises CPU and radio-frequency module, described radio-frequency module may further include the wake-up circuit for car-mounted terminal to be waken up to duty from dormant state, with reference to the process flow diagram shown in Fig. 7, described method specifically can comprise:
The motion of step 701, perception vehicle or stopping, and when the motion perceiving vehicle, to CPU output notice signal, when the stopping perceiving vehicle, do not output signal to CPU;
Step 702, under the dormant state of issuing car-mounted terminal, detect whether receive described notification signal;
Step 703, when not receiving from described notification signal, cut off the power supply of described wake-up circuit;
Step 704, when receiving described notification signal, open the power supply of described wake-up circuit.
In a preferred embodiment of the present application, the described motion of perception vehicle or the step of stopping, specifically can comprising:
Adopt the change in gravitational acceleration of three axle acceleration sensor perception place vehicle X, Y, Z, tri-axis;
When in X, Y, Z tri-axis, change in gravitational acceleration occurs for one or more, send look-at-me to CPU, this look-at-me is notification signal.
In the embodiment of the present application, preferably, described look-at-me is the notification signal of high level, and when not receiving the notification signal from described movement sensing module, the pin of CPU is high;
Described method can also comprise: when detection receives the notification signal of high level, drag down the pin of CPU.
In another preferred embodiment of the present application, described method can also comprise: carry out filtering process to the notification signal that described movement sensing module exports, and to the notification signal after CPU output filtering; The pulse signal that described filtering process stops the duration short passes through, the notification signal of clearance high level;
Now, the step whether described detection receives described notification signal is specially, and under the dormant state of issuing car-mounted terminal, detects the filtered notification signal whether received from described signal processing circuit;
The step of the power supply of the described wake-up circuit of described cut-out is specially, and when not receiving the filtered notification signal from described signal processing circuit, cuts off the power supply of described wake-up circuit;
The step of the power supply of the described wake-up circuit of described unlatching is specially, and when receiving the filtered notification signal from described signal processing circuit, opens the power supply of described wake-up circuit.
For embodiment of the method, due to itself and car-mounted terminal embodiment basic simlarity, so description is fairly simple, relevant part illustrates see the part of car-mounted terminal embodiment.
Each embodiment in this instructions all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
A kind of car-mounted terminal above the application provided and the method for managing power supply of car-mounted terminal, be described in detail, apply specific case herein to set forth the principle of the application and embodiment, the explanation of above embodiment is just for helping method and the core concept thereof of understanding the application; Meanwhile, for one of ordinary skill in the art, according to the thought of the application, all will change in specific embodiments and applications, in sum, this description should not be construed as the restriction to the application.
Claims (7)
1. a car-mounted terminal, comprises CPU and radio-frequency module, and described radio-frequency module comprises the wake-up circuit for car-mounted terminal to be waken up to duty from dormant state further, and it is characterized in that, described car-mounted terminal also comprises:
Movement sensing module, for motion or the stopping of perception vehicle, and when the motion perceiving vehicle, to CPU output notice signal, when the stopping perceiving vehicle, does not output signal to CPU;
Described CPU comprises:
Signal detection module, under the dormant state of issuing car-mounted terminal, detects the notification signal whether received from described movement sensing module;
Module is cut off in power supply, for when not receiving the notification signal from described movement sensing module, cuts off the power supply of described wake-up circuit; And
Power supply opening module, for when receiving the notification signal from described movement sensing module, opens the power supply of described wake-up circuit;
Described car-mounted terminal also comprises:
Signal processing circuit, is connected between described movement sensing module and CPU, carries out filtering process for the notification signal exported described movement sensing module, and to the notification signal after CPU output filtering; The pulse signal that described filtering process stops the duration short passes through, the notification signal of clearance high level;
Now, described signal detection module, specifically under the dormant state of issuing car-mounted terminal, detects the filtered notification signal whether received from described signal processing circuit;
Module is cut off in described power supply, specifically for when not receiving the filtered notification signal from described signal processing circuit, cuts off the power supply of described wake-up circuit;
Described power supply opening module, specifically for when receiving the filtered notification signal from described signal processing circuit, opens the power supply of described wake-up circuit;
Described signal processing circuit comprises: input end (IN), the first electric capacity (C1), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4) and triode (Q1), and output terminal (OUT);
Wherein, one end, shunt circuit ground connection that described first electric capacity (C1) and the first resistance (R1) form, the other end connects described movement sensing module by input end (IN), and the notification signal for exporting described movement sensing module carries out the process of filtering stabilization;
Second resistance (R2) is connected with described shunt circuit with one end of the 3rd resistance (R3), the other end is connected with triode (Q1), and the notification signal after the process of filtering stabilization is carried out dividing potential drop and exports to triode (Q1) by the second resistance (R2) and the 3rd resistance (R3);
When triode (Q1) conducting, it passes through output terminal (OUT) to the notification signal after CPU output filtering;
One termination power (VCC) of the 4th resistance (R4), another termination triode (Q1) and output terminal (OUT).
2. car-mounted terminal as claimed in claim 1, it is characterized in that, described movement sensing module is three axle acceleration sensors, this three axles acceleration sensor is used for the change in gravitational acceleration of perception place vehicle X, Y, Z tri-axis, and when in X, Y, Z tri-axis, change in gravitational acceleration occurs for one or more, send look-at-me to CPU, this look-at-me is notification signal.
3. car-mounted terminal as claimed in claim 2, it is characterized in that, described look-at-me is the notification signal of high level, and when not receiving the notification signal from described movement sensing module, the pin of CPU is high;
Described signal detection module, also for when detection receives the notification signal of high level, drags down the pin of CPU.
4. the car-mounted terminal as described in claim 1 or 2 or 3, is characterized in that, described signal detection module, and specifically under the dormant state of issuing car-mounted terminal, the notification signal whether received from described movement sensing module is detected at interval to schedule.
5. a method for managing power supply for car-mounted terminal, described car-mounted terminal comprises CPU and radio-frequency module, and described radio-frequency module comprises the wake-up circuit for car-mounted terminal to be waken up to duty from dormant state further, and it is characterized in that, described method comprises:
The motion of perception vehicle or stopping, and when the motion perceiving vehicle, to CPU output notice signal, when the stopping perceiving vehicle, do not output signal to CPU;
Under the dormant state of issuing car-mounted terminal, detect whether receive described notification signal;
When not receiving from described notification signal, cut off the power supply of described wake-up circuit;
When receiving described notification signal, open the power supply of described wake-up circuit;
Described method also comprises:
Filtering process is carried out to the notification signal that described movement sensing module exports, and to the notification signal after CPU output filtering; The pulse signal that described filtering process stops the duration short passes through, the notification signal of clearance high level;
Now, the step whether described detection receives described notification signal is specially, and under the dormant state of issuing car-mounted terminal, detects the filtered notification signal whether received from described signal processing circuit;
The step of the power supply of the described wake-up circuit of described cut-out is specially, and when not receiving the filtered notification signal from described signal processing circuit, cuts off the power supply of described wake-up circuit;
The step of the power supply of the described wake-up circuit of described unlatching is specially, and when receiving the filtered notification signal from described signal processing circuit, opens the power supply of described wake-up circuit.
6. method as claimed in claim 5, it is characterized in that, the described motion of perception vehicle or the step of stopping, comprising:
Adopt the change in gravitational acceleration of three axle acceleration sensor perception place vehicle X, Y, Z, tri-axis;
When in X, Y, Z tri-axis, change in gravitational acceleration occurs for one or more, send look-at-me to CPU, this look-at-me is notification signal.
7. method as claimed in claim 6, it is characterized in that, described look-at-me is the notification signal of high level, and when not receiving the notification signal from described movement sensing module, the pin of CPU is high;
Described method also comprises: when detection receives the notification signal of high level, drag down the pin of CPU.
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104243329B (en) * | 2014-09-25 | 2018-01-05 | 夏文松 | A kind of Split-type vehicle-carrying wireless router and its control method |
| TWI566616B (en) * | 2015-03-04 | 2017-01-11 | 瑞昱半導體股份有限公司 | Three-way handshaking method and computer readable media |
| CN105791395A (en) * | 2016-02-23 | 2016-07-20 | 腾讯科技（深圳）有限公司 | Information interaction method and vehicle terminal |
| CN105807889A (en) * | 2016-02-29 | 2016-07-27 | 宇龙计算机通信科技(深圳)有限公司 | Instruction processing method, instruction processing device and terminal |
| US10640038B2 (en) | 2016-05-11 | 2020-05-05 | Huawei Technologies Co., Ltd. | Intelligent car reminding method and apparatus |
| CN109727323B (en) * | 2017-10-27 | 2021-02-12 | 北京万集科技股份有限公司 | Method of label processing, road side unit, electronic device, and storage medium |
| CN109861698A (en) * | 2019-01-31 | 2019-06-07 | 苏州卷积智能信息技术有限公司 | Vehicle intelligent electronic wireless emitter and its system |
| CN111161556B (en) * | 2019-12-24 | 2021-09-07 | 北京握奇数据股份有限公司 | Highway traffic jam prompting method and system based on OBU |
| CN111806297A (en) * | 2020-06-19 | 2020-10-23 | 深圳拓邦股份有限公司 | Sleeping and awakening system and method of vehicle-mounted battery management system |
| CN112203346B (en) * | 2020-11-13 | 2023-03-24 | 三一汽车起重机械有限公司 | Power consumption management method, device, equipment and medium for vehicle-mounted terminal |
| CN112732341B (en) | 2020-11-30 | 2023-08-01 | 北京百度网讯科技有限公司 | Sleep control method and device for vehicle-mounted computing platform and readable storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1680895A (en) * | 2004-04-08 | 2005-10-12 | 上海华虹集成电路有限责任公司 | Onboard power supply unit managing method |
| CN101458830A (en) * | 2008-11-05 | 2009-06-17 | 南京理工大学 | Intelligent electric power management implementation device for vehicle-mounted unit of non-stop toll collecting system |
| CN201259540Y (en) * | 2008-09-02 | 2009-06-17 | 青岛海信移动通信技术股份有限公司 | Low power consumption positioning terminal |
| CN102001324A (en) * | 2010-10-27 | 2011-04-06 | 惠州Tcl移动通信有限公司 | Automobile antitheft warning device and method |
-
2011
- 2011-12-13 CN CN201110415388.8A patent/CN103164877B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1680895A (en) * | 2004-04-08 | 2005-10-12 | 上海华虹集成电路有限责任公司 | Onboard power supply unit managing method |
| CN201259540Y (en) * | 2008-09-02 | 2009-06-17 | 青岛海信移动通信技术股份有限公司 | Low power consumption positioning terminal |
| CN101458830A (en) * | 2008-11-05 | 2009-06-17 | 南京理工大学 | Intelligent electric power management implementation device for vehicle-mounted unit of non-stop toll collecting system |
| CN102001324A (en) * | 2010-10-27 | 2011-04-06 | 惠州Tcl移动通信有限公司 | Automobile antitheft warning device and method |
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