CN201054737Y - Non-predictive condition timely call forward device of onboard telephone - Google Patents

Abstract

A timely call forwarding device for a vehicle-mounted telephone under the non-predictable condition relates to the combination of the wireless communication and the automobile technology. The method comprises the processes that a detection circuit which detects whether a vehicle-mounted power supply is switched on is first connected in parallel on the vehicle-mounted power supply, and a MOS tube in the detection circuit is driven to trigger a standby charging power supply when the power is cut off; the vehicle-mounted power supply sends the interrupt triggering signal to a CPU in a vehicle-mounted telephone module while being turned off so as to inform the CPU that the vehicle-mounted power supply is already switched off; secondly, the CPU in the vehicle-mounted telephone module immediately utilizes the electric energy that the standby charging power supply provides to send the call forwarding information to the network according to the predetermined program and is automatically shut down. All calls dialed to the vehicle-mounted telephone are automatically transferred into the preset transfer target telephone. The utility model simultaneously discloses a device for realizing the method. The utility model solves the problem that the incoming call of the vehicle-mounted telephone is not transferred in time, thereby having the advantages of convenient realization and no incoming call leakage under whatever state.

Description

The timely call transferring device of the non-measurable condition of car phone

Technical field

The utility model relates to a kind of wireless communication technique, especially a kind of car phone call transferring device, specifically a kind of timely call transferring device of non-measurable condition of car phone.

Background technology

At present, networks such as GSM/CDMA all have the function of calling transfer, unconditional branch is generally all arranged, promptly in any case all incoming call unconditional branch to another telephone number, perhaps conditional jump is shifted when busy, at this moment network will carry out paging to original number terminal earlier, through just electrotransfer is to the forwarding number of setting in the future after the paging no response repeatedly, often expended considerable time this moment again, and the promoter of calling just can't wait probably hangs up phone.

Car phone develops to universal direction at present, and for businessperson, it has become important communication tool.Under the normal condition, car phone is at car owner's automobile flameout, and follow procedure utilizes default function when closing external power supply, just the phone of incoming call in time can be transferred on other phones of car owner's appointment.

Because the car phone on the automobile is generally all by automobile cigarette lighter power supply (or from other local power takings of automobile), the car owner wishes to leave automobile at him, incoming call is in time transferred on his mobile phone to the electric energy that comes of car phone after the automobile flameout, but because automobile flameout can cause the car phone abnormal shutdown, even having preestablished, car phone meets the busy conditional jump function that waits, but because network is not known the state of car phone at this moment, can send paging earlier, through the electrotransfer in the future just of network after the paging no response repeatedly, but tended to experience a period of time (test shows China Mobile and CHINAUNICOM will just can shift through about 20 seconds time) this moment, perhaps, the incoming call promoter can't wait already, and calling is hung up.

Summary of the invention

The purpose of this utility model is to influence the problem of normal communication can't be at short notice behind the automobile flameout unconditional phone be transferred on the phone that the car owner wishes at car phone, in case design the timely call transferring device that a kind of vehicle power is closed the non-measurable condition that can unconditionally all incoming calls be transformed into the car phone on the phone that the car owner wishes.

The technical solution of the utility model is:

A kind of timely call transferring device of non-measurable condition of car phone, comprise car phone module 1, vehicle power 2, the interruption of the CPU of car phone module 1 links to each other with electric live source 2, it is characterized in that between vehicle power 2 and car phone module 1, also being connected with a power supply testing circuit, this power supply testing circuit is mainly by metal-oxide-semiconductor Q, reserce cell 5 and diode D form, the grid of metal-oxide-semiconductor Q links to each other with vehicle power 2, its source electrode links to each other with the positive pole of reserce cell 5, its drain electrode links to each other with the power input of car phone module 1, and diode D is attempted by between the emitter of vehicle power 2 and metal-oxide-semiconductor Q.

Described reserce cell 5 also is connected with charging circuit 4.

The beneficial effects of the utility model:

The utility model efficiently solves the problem of missing phone.Many times car phone is when utilizing the function car owner of bluetooth handsfree, dialing to get on the bus, its at ordinary times usefulness mobile phone by bluetooth automatically and the Bluetooth pairing of car phone, order by bluetooth MODEM, with car owner's phone Outgoing Call.But since self mobile phone of car owner not necessarily bluetooth cellular phone or bluetooth cellular phone are not supported by the bluetooth dial feature, the car owner is when using car phone, unavoidably need another SIM/UIM card to be placed on the car phone, utilize the GSM of car phone itself or the dial feature of CDMA, the user just has two numbers for others' sensation like this, others' incoming call just incoming call whenever and wherever possible to car phone, and this moment the user probably not onboard.Because when the car owner wants switch-off, the igniting of driving, it is an incident at random, to car phone is uncertain, therefore, the utility model is the critical function of car phone, needing only whenever stops working just can in time transfer to all incoming calls in the phone of hope, efficiently solves the problem that may miss phone.

Closing the time that will have a hysteresis of car phone allows network know the state of oneself, also knows own residing " pattern " in the time of start, allows car phone that the sensation of " intelligence " has been arranged immediately.The car owner can experience on the one hand safe, convenient, fast that driving that car phone brings makes a phone call when driving like this, can guarantee that again the car owner does not miss each important phone after leaving automobile simultaneously.

Circuit structure of the present utility model is simple, is easy to realize that cost is low, reliable operation.

Description of drawings

Fig. 1 is an electrical schematic diagram of the present utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described.

As shown in Figure 1.

A kind of timely call transferring device of non-measurable condition of car phone, as shown in Figure 1, it comprises car phone module 1, vehicle power 2, the interruption of the CPU of car phone module 1 links to each other with electric live source 2, it is characterized in that between vehicle power 2 and car phone module 1, also being connected with a power supply testing circuit, this power supply testing circuit is mainly by metal-oxide-semiconductor Q (the P-channel enhancement type model can be A03401), charging circuit 4 (can adopt the common charging circuit of textbook to be realized), reserce cell 5 (rechargeable battery) and diode D form, the grid of metal-oxide-semiconductor Q links to each other with vehicle power 2, its source electrode links to each other with the positive pole of reserce cell 5, its drain electrode links to each other with the power input of car phone module 1, and diode D is attempted by between the emitter of vehicle power 2 and metal-oxide-semiconductor Q.

As shown in Figure 1, need a testing circuit that having or not of external power supply detected as hardware of the present utility model, can obtain by external power supply by the bleeder circuit that two resistance are formed, receive on the interruption pin of system master CPU, and be connected to simultaneously on another general input/output port (GPIO).Because external power supply is from having is not having or grow out of nothing and can regard the triggering of a trailing edge or rising edge as, can inquire about current state simultaneously on the GPIO (has the high level of being exactly, represents that vehicle power powers; Nothing is exactly a low level, and the expression vehicle power is closed, and automobile is flame-out).Backup battery and external power supply can switch, and under the normal boot-strap state, by external power supply reserce cell are charged.

In the time of the car phone start, the incoming call transfer apparatus of onboard system shifts in shutdown, that is to say if car phone normally moves back gateway machine will be transferred to the incoming call calling on other numbers of user's appointment, just can not open the incoming call forwarding function under the normal situation of car phone.The user is when using car phone, power with vehicle power at ordinary times, the parking but the user may stop working at any time, the user flame-out again after also can not can remembering earlier car phone to be closed at every turn, when user's automobile flameout, the baby battery of backup begins to enable, to the interrupt signal of a trailing edge will be arranged on the testing circuit of external power supply, system CPU has been known the external power supply disappearance by the state of inquiry GPIO again, the car owner is flame-out stops, so car phone sends the net information of moving back to network at once, and shutdown automatically, the incoming call of making afterwards on the car phone will be transferred on original other numbers set of car owner (can be car owner's mobile phone of usefulness at ordinary times) timely, and the car owner just can not miss a phone.After the car owner opened automobile again, car phone was opened automatically, and GPIO is high, will cancel the function of coming electrotransfer, just can not be transferred for like this incoming call of car phone, need not manually being provided with once more of car owner.

The utility model makes car phone freely to install, to dismantle at automobile, need not automobile is carried out any repacking, and corresponding application on automobile is called " driving pattern ", also can carry, and is called " hand-held mode ".Car phone itself has a battery, and just need not has increased reserce cell again.In " hand-held mode ", owing to do not have external power supply on the testing circuit, be " low level " always, metal-oxide-semiconductor is opened always, and on-board telephone system is battery-powered, and system host CPU in start back is learnt by inquiry GPIO, no external power supply, be " hand-held mode ", will shield application of the present utility model, shut down, come misoperations such as electrotransfer when avoiding hand-held.And on automobile when " driving pattern ", owing to have vehicle-mounted external power supply, power sense circuit to be input as " high level ", MOS closes, and on-board telephone system is fully by the power supply of automobile external power supply, and battery just is in the state by the vehicle power charging.Work as automobile flameout, power sense circuit is output as " low level ", metal-oxide-semiconductor is opened, onboard system switches to powered battery at once, the disappearance of external power supply simultaneously will be given interruption of system CPU, CPU this moment learns that by inquiry GPIO external power supply disappears, so will shut down, move back net, finishes timely calling transfer.

Claims (2)

1. the timely call transferring device of the non-measurable condition of a car phone, comprise car phone module (1), vehicle power (2), the interruption of the CPU of car phone module (1) links to each other with electric live source (2), it is characterized in that between vehicle power (2) and car phone module (1), also being connected with a power supply testing circuit, this power supply testing circuit is mainly by metal-oxide-semiconductor Q, reserce cell (5) and diode D form, the grid of metal-oxide-semiconductor Q links to each other with vehicle power (2), its source electrode links to each other with the positive pole of reserce cell (5), its drain electrode links to each other with the power input of car phone module (1), and diode D is attempted by between the emitter of vehicle power (2) and metal-oxide-semiconductor Q.

2. the timely call transferring device of the non-measurable condition of car phone according to claim 1 is characterized in that described reserce cell (5) also is connected with charging circuit (4).

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