CN102749842A

CN102749842A - Time-telling electronic clock synchronized with time-telling signal

Info

Publication number: CN102749842A
Application number: CN2012102330702A
Authority: CN
Inventors: 李琛
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-06
Filing date: 2012-07-06
Publication date: 2012-10-24

Abstract

The invention discloses a time-telling electronic clock synchronized with a time-telling signal. The time-telling signal of a broadcasting station is received by a radio reception module; an active narrow-band wide-dual-T-band pass filter is used for extracting the time-telling signal from the broadcast signal and sending the time-telling signal into a singlechip. According to a method invented by Li Chen, a register which is called an 'initial value dynamic register' is set and named; parameters of the initial value dynamic register are modified according to the speed of the clock, so that the electronic clock can be synchronized with the time-telling signal; and time telling can be performed through the time-telling voice of the broadcasting station. According to the technology, the replacement of a clock with pointers (such as a quartz clock) and a light emitting diode (LED) display electronic clock (such as a perpetual calendar) can be realized; and a new product such as a mother and son clock which can accurately keep the time and perform time-telling can be produced.

Description

The synchronous capable of telling time electronic clock of time signal

Technical field:

Belong to clock technology.

Background technology:

The accurate electronic watch of the timing of seeing on the market at present has two kinds basically, i.e. the perpetual calendar of crystal clock and LED demonstration.Its clock frequency produces by quartz (controlled) oscillator, and long-term timing also has error, does not generally also possess accurately concrete language time reporting function.Also seeing the capable of telling time electroclock in some public arenas such as post and telecommunications building, it is very inaccurate when walking, and is inconvenient during artificial often school.I have invented a kind of with the synchronous electronic clock of the time signal in broadcasting station through studying for a long period of time for this reason; The time signal in broadcasting station is from national time service center; The sound (as ticking 12 o'clock sharps of----Beijing time) that gives the correct time that broadcasts subsequently is also capable of using, thereby has formed patent of the present invention " the synchronous capable of telling time electronic clock of time signal ".

The stable of oscillation frequency can have two kinds of methods, and a kind of is pursue components and parts highly stable, use quartz (controlled) oscillator now unlimitedly, but it also has frequency drift for a long time, thus in causing, short-term accurate timing and secular error is very big when needing the school.Strict quartz (controlled) oscillator will be used the calibration cell frequency stabilization.Another kind method is the AFT technology, like the AFC technology of using in the televisor.It is a benchmark with a standard frequency, and the local oscillation frequency that produces and standard frequency (frequency that transmits like TV station) are compared, and produce error voltage, and error voltage adjusting voltage controlled oscillator is that the frequency of local oscillator is with identical with standard frequency.Patent principle of the present invention just is to use the such frequency stabilization technology of similar AFT technology, is " standard frequency " with time signal, and " oscillation frequency " of synchronous electronic clock is so that timing and time signal are synchronous.But the AFC technology belongs to analogue technique, belongs to digital technology and use single-chip microcomputer to produce " oscillation frequency " in person.How with the AFC technology " transplanting " of analogue technique in digital technology, the problem of Take me as I am.

Summary of the invention:

The AFC technology of analogue technique will be used voltage controlled oscillator, because exist analog quantity to arrive the conversion of pulse signal.Does not the single-chip microcomputer of digital technology need voltage controlled oscillator what if? My scheme is " direct intervention ", because all be at " numeric field ".Be provided with for this reason and name one and be referred to as the register of " initial value dynamic register ".Dynamically, promptly do not fix, according to the dynamic assignment of timing rate.Subregion on time domain for this reason.Per hour be made as the A district in 59 minutes 55 seconds-0 minute 0 second, be made as the B district in 0 minute 0 second-0 minute 5 seconds, close in the B district and claim the time zone, school in the A district.The explanation clock is slow when time signal appears at the A district, sends into for " initial value dynamic register " and can make it walk fast parameter (like 0EH).The explanation clock is fast when time signal appears at the B district, sends into for " initial value dynamic register " and can make it walk slow parameter (like 0CH).The value of initial value dynamic register is sent into " initial registers " again, like TL0.

Single-chip microcomputer timer initial value all is changeless behind write-in program, and this can be referring to some single-chip microcomputer teaching material documents.21 century institution of higher learning's computing machine teaching material series " Fundamentals of Mono-Chip Computers & Applications study course " of publishing like China Machine Press etc.I set up the register of " dynamically ", and can change static is that dynamically patent of the present invention that Here it is is the technical characterictic of intellecture property.

Description of drawings:

Accompanying drawing 1 SCM program flowchart text.

Accompanying drawing 2.A uses the circuit theory diagrams explanation of the model machine of LED demonstration of the present invention.

Accompanying drawing 2.B uses the circuit theory diagrams explanation of the model machine of pointer type of the present invention.

Embodiment:

The design has two interruptions.When T1 interrupts being used for, score value adds 1 in time, divides, second show and the time system of calling is handled subroutine.It is the conversion to 12 o'clock systems of 24 o'clock systems that time system is handled work that subroutine accomplishes, the display driver of 24 o'clock systems, 12 o'clock systems, the display driver at 12 o'clock upper and lower noons of system, the display driver when time signal arrives.

It is core of the present invention that T0 interrupts.Because just to the toggle rate fine setting, TH0 is constant for the T0 high byte, only changes TL0, TL0 is an initial registers, and the initial value dynamic register is sent into the TL0 initial registers according to timing rate after by assignment.0 o'clock generation day added 1 negative pulse and is used for week date processes and displays.

Embody practicality of the present invention with two model machines that successfully use the present invention to design and produce in person as example.

Accompanying drawing 2.A uses the circuit theory diagrams explanation of the model machine of LED demonstration of the present invention

Radio reception module I C1 is common FM reception module, and sound signal is divided into two-way from the output of (14) pin behind JK2, and one the tunnel send the IC3 audio frequency to amplify.The active narrow bandwidth double T BPF. of being made up of IC2 and peripheral cell thereof is sent on another road through potentiometer R2; Take out time signal; Through voltage multiplying rectifier, the P3.5 pin send single-chip microcomputer IC4 is amplified in the Q1 anti-phase, when time signal arrives according to the parameter of timing rate modification " initial value dynamic register ".JK2 is the time signal input socket that computer is recorded, and plug inserts the frequency of the time signal of input computer generation for adjusted band-pass filter.With oscillograph observation test end T1 waveform, amplitude is the highest when transferring R8, R10 that time signal is arrived, and transfers R2 to make and does not produce clipping distortion.The time signal adjusted band-pass filter of why recording with computer is because time signal each hour in broadcasting station occurs once, can't adjusted band-pass filter.Extract when the computer output plug, import the fm broadcast signal that this machine radio reception module produces, this is a duty.The 1. end of K2 is thrown 3. loudspeaker Chang Xiang, can be used for transferring the radio reception frequency.Do not ring when 1. K3 throws the sound that 2. gives the correct time.The P3.4 pin of IC4 is a high level in the time zone, school, and Q3 ends, and IC3 is powered, sound when loudspeaker are reported.Time zone, non-school P3.4 pin is a low level, and IC3 is not powered, and loudspeaker do not ring.

The P3.3 pin of IC4 is a time system display driver end, 24 o'clock system variable color light emitting diode D8 green light, and system glowed in 12 o'clock.The P3.2 pin is 12 o'clock upper and lower noons of system and integral point display driver end.System variable color in morning light emitting diode D9 glowed in 12 o'clock, and green light was made D9 and do not worked in 24 o'clock afternoon.D9 was red once glittering when the integral point time signal arrived.The D9 variable color is once glittering during 12 o'clock systems.

Answer setting-up time before the use, difunctional K switch 5 is set for simplifying hardware configuration.K5, K6 press (related port that is defined as of " pressing " is a low level) simultaneously can add 1 to score value.K5 lifts by K6 can add 1 to duration.K7 is a reset switch.Be that 0 timesharing is when beginning to walk by K7 when Beijing time when setting, behind the score value.It is different with general electronic clock that the design " resets ".In master routine only to second initial value put 0, the time, divide initial value by the user with K5, K6 setting.

It is 12 o'clock systems that K5 is pressed in normal use separately, and it is 24 o'clock systems that K5 lifts.D2 is a second shwoot optical diode, and per second is once glittering.IC6, IC7 and charactron are formed typical Hour Minute Second numeral and are shown.The P1.7 pin of I C4 produce add day 1 negative pulse send year, month, day, week circuit.

Power unit is provided with bridge heap D6, and JK1 is the AC and DC input socket.When grid power blackout, supply power by dry cell or chargeable battery.Battery consumption when reducing grid power blackout, during power failure except that D2 light-emitting component all do not work, loudspeaker do not ring, and only guarantee the IC4 power supply.EB does not have electricity during power failure, and EA is battery-powered.D4 is the under-voltage indication of battery, and D4 did not work when voltage was sufficient, and D4 is little to prepare to change battery when bright.D11, R34 provide the floating charging electric current of chargeable battery.

Accompanying drawing 2.B uses the circuit theory diagrams explanation of the model machine of pointer type of the present invention

Crystal clock only keeps magnetizing coil CL, the circuit board cancellation.2.A compares with accompanying drawing, and P3.5, P3.4, P3.7, crystal oscillator X1, X2 relevant portion are constant, and the P1.0-P1.5 relevant portion is not.P1.6, P1.7 are by figure, and the voltage that the per second anti-phase is provided is to magnetizing coil.Reset circuit RST is like figure.Operation as follows, K4 lifts, and revolves indicator to certain, K4 is pressed during for this value when duration, indicator is walked about.

Claims

1. the technical characterictic of patent of the present invention " the synchronous capable of telling time electronic clock of time signal " is " the initial value dynamic register " that is provided with and names a single-chip microcomputer timer, the AFC technology of analogue technique is incorporated into the single-chip microcomputer of digital technology; This is not all seeing in some teaching materials or the newpapers and periodicals at present, does not see yet and uses this technological product; Therefore require this patent of invention technology is protected.

2. " initial value dynamic register " at first proposed the register that is provided with and names for Li Chen, but therefore requires also called after " Li Chen register " of initial value dynamic register.