CN1353347A - Time calibration method and controller - Google Patents

Abstract

A method for time calibration includes such steps as finding out a signal synchronous to GPS time or GPS signal, receiving the said signal, periodically picking-up the real GPS time from the signal, using it as the reference for internal timer in the equipment, and directly calculating the current time. Its control is also disclosed.

Description

A kind of time calibrating method and time calibration control device

The present invention relates to a kind of time calibrating method and time calibration control device.Specifically, relate to a kind of like this method and apparatus, utilize described method and apparatus, can be according to certain signal source reference time of GPS for example, utilize the reception that comprises the numerical information of reference time in gsm communication net or the paging system again, automatically timing devices such as clock and watch are carried out time calibration.

Clock and watch were invented a lot of years, it provides temporal information to people, people do various things according to temporal information, but in daily life no matter the clock and watch which company (producer) produces all can produce accumulated error, the conventional approach of eliminating this accumulated error is chosen exactly and is adjusted clock and watch, and this brings inconvenience to people virtually.

Abroad had at present to receive the product that the Satellite GPS signal is calibrated automatically to wrist-watch, but this product needed GPS receiver, and equipment is very expensive, and can only receive the satellite-signal of direct projection, can't be in indoor use.

Current society has entered informationized society, has a lot of information can receive, handle and utilize.Signal transmission power such as the multi-frequency roaming paging system is strong, signal wide coverage (each base station can cover 30 kilometers), and signal frequency belongs to uhf band, and buildings etc. is had stronger diffracting power, can be in indoor reception.Therefore, press at present and a kind ofly can utilize existing signal resource that timing devices such as clock and watch are carried out automatic Calibration Method and device.

In order to solve the above problems, the objective of the invention is to propose a kind of can be according to the GPS standard time, regularly send calibrating signal, a kind of method and apparatus when the control clock and watch are walked automatically.

According to the present invention, a kind of time calibrating method has been proposed, may further comprise the steps:

1) find and a kind ofly be synchronized to the signal of gps time or directly be gps signal, more satisfactory signal can be to utilize existing mobile radio communication or paging network signal, because these two kinds of signals all directly are synchronized on the gps time;

2) receive this and be synchronized to signal on the gps time;

3) regularly extract real-time gps time from this signal, and with between this moment as reference time of device internal clocking;

4) the inner computing machine of device according to the GPS reference time of extracting and internal clocking obtain from the GPS reference time of count value till now, directly calculate the current real time.

The invention allows for a kind of time calibration of control device, comprising:

1) receiver: be used to receive the system signal that is synchronized on the gps time, as mobile radio communication signal or paging signal;

2) information processing and internal clock circuit: be used for extracting GPS reference time that received signal carries and according to from GPS reference time to current inside quartzy clock calculation value, directly calculate the real time;

3) display circuit: be used for time figure with current reality and show or show with the pointer mode.

The present invention utilizes and extracts series of products that GPS standard time technological development goes out to have a volume little, in light weight, and little power consumption is highly sensitive, can use characteristics such as AC and DC power supply.These series of products can also be installed in the inside of miscellaneous equipment (or product).

Because series of products of the present invention are according to the GPS standard time, regularly send calibrating signal (time calibration), so use equipment of the present invention (or product) time consistency very good.As very accurate when utilizing clock and watch of the present invention to walk, the automaticity height does not need manually to calibrate, if such clock and watch are put together, can find that all clock and watch all point to the same time (hour hands, minute hand, second hand all very one to).These clock and watch can also provide current year, month, day information in addition.This clock and watch are as long as energized just can indicate current year, month, day, hour, min, second within several minutes.Use in fields such as this clock can be in the hotel, restaurant, bank, post and telecommunications, communications and transportation, education, also can enter into family as medium-to-high grade household electrical appliance, accurate clock when providing away for the whole society.This in addition clock and watch can also provide information such as local temperature, humidity, to prompt facility is set individual's birthday and great festivals or holidays etc.

Fig. 1 is the schematic diagram of full-automatic digital information reception of the present invention and time calibrating installation.

Fig. 2 A and 2B are that full-automatic digital information shown in Figure 1 receives and the detailed circuit diagram of time calibrating installation.

Fig. 3 is the sequential chart of Flex paging signal.

Finish time calibrating method of the present invention and the device key be following some:

1. find a kind of time source (as GPS), receive signal reference time that this time source sends;

2. gather the signal of expression present clock state, according to reference time and present clock state computation going out calibration parameter, and this Parameters Transformation is become control signal;

3. send control signal to controlled device (or product), the time calibration of finishing by controller.

Obtain gps signal at present dual mode can be arranged:

(1) receive the gps signal that satellite sends: this method needs the GPS receiver, and equipment is very expensive, and can only directly accept the satellite-signal of direct projection, can't be in indoor use.

(2) a GPS synchronizing signal of utilizing the multi-frequency roaming spread all over the country to seek in the network can obtain the GPS time reference signal.Because the signal transmission power of the signal of FLEX multi-frequency roaming paging system and POCSAS sign indicating number roaming paging system is big, the signal wide coverage has stronger diffracting power to buildings etc., can be in indoor reception.

The inventor finds, utilizes the GPS reference time of FLEX multi-frequency roaming paging signal and POCSAS sign indicating number roaming paging signal, and regularly (as per 4 minutes) are sent the calibration control signal, can be controlled miscellaneous equipment (or product).For example 1) product of control clock and watch can regularly send calibrating signal according to the GPS standard time, when the control clock and watch are walked, eliminate the accumulated error of clock and watch, level was for accurately when clock and watch were walked, and use in fields such as this novel clock and watch can be in the hotel, restaurant, bank, post and telecommunications, communications and transportation, education.2) product of control computer clock can make the system for computer time not have accumulated error according to the automatic calibration calculations machine time of GPS standard time.Can produce top-end computer with this product, particularly suitable with to the wide area network application system of time requirement strictness.

Referring to Fig. 1, Fig. 1 shows the schematic diagram of full-automatic digital information reception of the present invention and time calibrating installation.Receiver receives aerial radio communication that has the gps time benchmark or paging signal by inside antenna, after the receiver demodulation, give decoding circuit and carry out protocol-decoding, microprocessor therefrom extracts the starting time of current period, data such as date, and the actual gps time of calculating current time, give the information display driver circuit and current time and date are directly shown by display screen.In addition, microprocessor can also be handled by temperature, the relevant data that humidity sensor is sent here, and these data are shown by display screen.

Fig. 2 A and Fig. 2 B show the full-automatic digital information reception shown in Figure 1 and the detailed circuit diagram of time calibrating installation.

Referring to Fig. 3, Fig. 3 has specifically described the formation sequential chart of Flex paging signal.

In existing GSM mobile handset broadcast channel and the paging system signal, all have to make mobile phone and pager be synchronized to the signal of system.With typical Flex paging signal is example, and the synchronous code of paging signal is: there are 15 cycle (cycle) each hour, and each cycle is 4 minutes, and each cycle includes 128 frames (every frame is 1.875 seconds), and each frame includes 11 Block (piece).Pager is in order to receive paging signal, and it at first will be synchronized on the cycle of paging system signal.Because paging signal is all issued the system signal that includes the initial gps time of current cycle, date data at each cycle, as long as therefore can gps time, date data extract real-time that the cycle in the current cycle system signal of paging system is initial come out, just can be with it as the parameter of calibrating automatically.

Owing to just can obtain the initial gps time of current cycle, date data every 4 minutes, and these data and self timekeeping system error have nothing to do, so this automatic calibrating method has just been eliminated the deficiency of other calibration steps accumulated error.Because the automatic calibrating method accumulated error in 4 minutes, can be ignored.

Claims (2)

1. time calibrating method may further comprise the steps:

1) find and a kind ofly be synchronized to the signal of gps time or directly be gps signal, more satisfactory signal can be to utilize existing mobile radio communication or paging network signal, because these two kinds of signals all directly are synchronized on the gps time;

2) receive this and be synchronized to signal on the gps time;

3) regularly extract real-time gps time from this signal, and with between this moment as reference time of device internal clocking;

4) the inner computing machine of device according to the GPS reference time of extracting and internal clocking obtain from the GPS reference time of count value till now, directly calculate the current real time.

One kind time calibration control device, comprising:

1) receiver: be used to receive the system signal that is synchronized on the gps time, as mobile radio communication signal or paging signal;

2) information processing and internal clock circuit: be used for extracting GPS reference time that received signal carries and according to from GPS reference time to current inside quartzy clock calculation value, directly calculate the real time;

3) display circuit: be used for time figure with current reality and show or show with the pointer mode.

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