CN102523011B - Method for effectively realizing time-code signal receiving of indoor electric waves - Google Patents
Method for effectively realizing time-code signal receiving of indoor electric waves Download PDFInfo
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- CN102523011B CN102523011B CN201110458702.0A CN201110458702A CN102523011B CN 102523011 B CN102523011 B CN 102523011B CN 201110458702 A CN201110458702 A CN 201110458702A CN 102523011 B CN102523011 B CN 102523011B
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Abstract
The invention discloses a method for effectively realizing time-code signal receiving of indoor electric waves. The method is characterized in that a transmitting circuit board comprises an AM (Amplitude Module) antenna circuit, an AM receiving and decoding circuit, an MCU (Micro Control Unit) circuit and an indicating lamp circuit, wherein the MCU circuit sends an instruction received by an electric wave clock, and excites the AM receiving and decoding circuit; a timing electromagnetic wave signal transmitted by a time service center is received by the AM antenna circuit; after amplification and demodulation of the AM receiving and decoding circuit, the MCU circuit reads timing time information and carries out timing adjustment on the time; when receiving the signal, the MCU circuit sends an instruction to the indicating lamp circuit and prompting that the signal is being received; and after the receiving is successful, the MCU circuit sends an interruption request signal, prompts that the decoding is finished, sends a receiving stopping instruction to the AM receiving and decoding circuit, so that the AM receiving and decoding circuit returns to a sleeping state and simultaneously the indicating lamp circuit is stopped. The method has the advantages that the structure is simple, the operation is simple and convenient and the outdoor temperature detection can be realized.
Description
Technical field
The present invention relates to transmitting set field, refer more particularly to a kind of method that effective solution indoor electric ripple time code signal receives.
Background technology
Principle when electric wave school: can receive signal time calibration that contains standard time data, and its present time of corresponding adjustment.Whole system comprises two parts: 1: transmitting terminal, refer to long-wave signal launching tower, and it includes atomic clock, and the time is accurate to 100,000 years errors and is no more than 1 second.Position is fixed, 1000 kilometers of-2000 kilometers of transmittings of radius towards periphery; 2: receiving terminal, refer to radio controlled timepiece, it includes long wave reception antenna.Receiving course is: 1. use built-in aerial to receive signal, 2. receiving terminal is decoded to the data receiving and is converted into time data.3. receiving terminal is adjusted the time according to time data.
Front in Britain, Germany, the U.S., Switzerland, Japan, CHINESE REGION all has time launching tower when school, the continual transmitting low frequency AM standard time is calibrated signal, (Britain is 60KHz, Germany is 77.5KHz, the U.S. is 60KHz, Switzerland is 75KHz, Japan is 60KHz and 40KHz, China is for 68.5KHz) electric wave platform utilizes radio wave technology to send signal to each corner of effective radius centered by the launching tower of place, the clock and watch of receiving electric wave can be according to the time in signal, week, year, month, the message automatic calibrations such as day, allow you have with the precision as atomic clock.
Meteorological element atmospheric temperature, air humidity detect principle: meteorological element refers to fundamental physical quantity and the basic weather phenomenon of Earth Surface Atmosphere state, mainly contain atmospheric temperature, air humidity etc., the comfort level of this key element and life staying idle at home has very large relation, a lot of lifes staying idle at home need to be understood this meteorological element, have just produced thermometer, the hygrometer of a lot of meteorological use.
Short distance micropower transceiving technology: in daily life, there is much equipment need to use radiotechnics, comprise a lot of family products, as cordless telephone, remote-control toy etc., all belong to the wireless device of short distance micropower, adopt such technology, wherein there are transmitter and receiving equipment, in order to prevent that the radio traffics such as radio and television, navigation, mobile communication are produced and disturbed, this kind equipment has all specified special frequency, and restriction maximum power, belongs to micropower, and reception and transmission range is shorter, but use in very applicable family product.
Due in daily life indoor, use a large amount of electrical equipment and electronic equipment, produce more mixed and disorderly electromagnetism wave amplitude and penetrate, and radio wave clock reception technique has belonged to low-frequency electromagnetic wave reception technique, easily be subject to the electromagnetic interference that indoor electric appliance and electronic equipment produces, cause and take defeat.
Summary of the invention
The object of the invention is to overcome above-mentioned weak point of the prior art and provide a kind of simple in structure, easy to operate, can effectively solve indoor electric ripple time code signal receive method.
The present invention realizes in the following way:
A kind of method that effective solution indoor electric ripple time code signal receives, it is characterized in that: include radiating circuit plate and comprise AM antenna circuit A, AM receipt decoding circuit B, humiture testing circuit C, MCU circuit D, FM modulation transmitter E, FM antenna circuit F, power circuit G, indicator light circuit H, wherein:
(1), described MCU circuit D sends radio wave clock and receives instruction, excite in the AM of resting state receipt decoding circuit B, electromagnetic wave signal while receiving the school of launching at time service center by AM antenna circuit A, amplified after demodulation by AM receipt decoding circuit B, output MCU circuit D can debate after other signal, carry out software analysis, temporal information while reading school, the adjustment when time of this device is carried out to school, receiving signal simultaneously, MCU circuit D sends instruction to indicator light circuit H, prompting is receiving signal, after receiving successfully, MCU circuit D sends interrupt request singal, prompting decoding completes, send and stop receiving instruction to AM receipt decoding circuit B, make AM receipt decoding circuit B get back to again resting state, indicator light circuit H closes simultaneously,
(2), described MCU circuit D sends after temperature and humidity detection instruction, activate humiture testing circuit C, temperature and humidity in atmosphere is by temperature sensor and humidity sensor, change into circuit and can debate other physical characteristic, convert MCU circuit D to by humiture testing circuit C and can debate other signal of telecommunication, by the in house software analytic operation of MCU circuit D, draw corresponding environmental data;
(3), described MCU circuit D is successfully receiving standard time signal and is detecting after the humiture data of place environment, convert corresponding binary code to, by FM modulation transmitter E, carry out after signal FM modulation, by the electromagnetic wave after FM antenna circuit F transmitting modulation, realize the object of the transmission of data, in transmitting, MCU circuit D sends instruction to indicator light circuit H, and prompting transmits; After having launched, FM modulation transmitter E and indicator light circuit H get back to resting state;
(4), described power circuit G provides power supply for each circuit module.
Described AM antenna circuit A is mainly made up of coil bar magnet L1 and capacitor C 1, and Main Function is that airborne special electromagnetic wave is frequently received and convert to radio signal transmission to AM receipt decoding circuit B.
Described AM receipt decoding circuit B is mainly made up of AM receipt decoding chip U1 and low frequency standard quartz crystal oscillator Y1, and Main Function is that the signal that AM antenna circuit A is received enters amplification, subtracts ripple, demodulation.
Described humiture testing circuit C is mainly made up of temperature sensor RT, humidity sensor RH and fixed resistance R3 and capacitor C6, and Main Function is that the temperature and humidity of environment is converted to the signal of telecommunication.
Described MCU circuit D is mainly made up of integrated micro-chip processor U2 and quartz crystal oscillator Y2, and Main Function is that the signal of controlling after activation and the signal feedback of AM receipt decoding circuit B, FM modulation transmitter E and humiture testing circuit C is processed and transmission.
Described FM modulation transmitter E is made up of FM modulate emission chip U3 and quartz crystal oscillator Y3, and Main Function is that temperature, humidity information and temporal information that MCU circuit D is transmitted are modulated and be transferred to FM antenna circuit F by chip.
Described FM antenna circuit F is mainly made up of inductor L3, capacitor C17 and PCB coupling antenna C18, and Main Function is the radiofrequency signal of FM modulation transmitter E to be mated to antenna C18 by PCB convert electromagnetism wave amplitude to and be mapped in air and blaze abroad.
The invention has the advantages that: adopt outdoor reception radio wave clock signal, can obtain purer reception environment, and, can receive than indoor stronger reception signal, greatly improve the success rate receiving, and in conventional radio wave clock reception technique, add outdoor humiture environment measuring element, by the short distance micropower wireless technology of high frequency, the standard time signal receiving and outdoor environment temperature and humidity meteorological element value are transferred to indoor receiving equipment by employing high frequency radio, and receiving equipment shows indoors.
Brief description of the drawings
Fig. 1 circuit block diagram of the present invention;
Fig. 2 circuit diagram of the present invention.
Embodiment
Now by reference to the accompanying drawings, the specific embodiment of the invention is described in detail in detail:
As shown in Figure 1 and Figure 2, a kind of method that effective solution indoor electric ripple time code signal receives, it is characterized in that: include radiating circuit plate and comprise AM antenna circuit A, AM receipt decoding circuit B, humiture testing circuit C, MCU circuit D, FM modulation transmitter E, FM antenna circuit F, power circuit G, indicator light circuit H, wherein:
(1), described MCU circuit D sends radio wave clock and receives instruction, excite in the AM of resting state receipt decoding circuit B, electromagnetic wave signal while receiving the school of launching at time service center by AM antenna circuit A, amplified after demodulation by AM receipt decoding circuit B, output MCU circuit D can debate after other signal, carry out software analysis, temporal information while reading school, the adjustment when time of this device is carried out to school, receiving signal simultaneously, MCU circuit D sends instruction to indicator light circuit H, prompting is receiving signal, after receiving successfully, MCU circuit D sends interrupt request singal, prompting decoding completes, send and stop receiving instruction to AM receipt decoding circuit B, make AM receipt decoding circuit B get back to again resting state, indicator light circuit H closes simultaneously,
(2), described MCU circuit D sends after temperature and humidity detection instruction, activate humiture testing circuit C, temperature and humidity in atmosphere is by temperature sensor and humidity sensor, change into circuit and can debate other physical characteristic, convert MCU circuit D to by humiture testing circuit C and can debate other signal of telecommunication, by the in house software analytic operation of MCU circuit D, draw corresponding environmental data;
(3), described MCU circuit D is successfully receiving standard time signal and is detecting after the humiture data of place environment, convert corresponding binary code to, by FM modulation transmitter E, carry out after signal FM modulation, by the electromagnetic wave after FM antenna circuit F transmitting modulation, realize the object of the transmission of data, in transmitting, MCU circuit D sends instruction to indicator light circuit H, and prompting transmits; After having launched, FM modulation transmitter E and indicator light circuit H get back to resting state;
(4), described power circuit G provides power supply for each circuit module.
Described AM antenna circuit A is mainly made up of coil bar magnet L1 and capacitor C 1, and Main Function is that airborne special electromagnetic wave is frequently received and convert to radio signal transmission to AM receipt decoding circuit B.
Described AM receipt decoding circuit B is mainly made up of AM receipt decoding chip U1 and low frequency standard quartz crystal oscillator Y1, and Main Function is that the signal that AM antenna circuit A is received enters amplification, subtracts ripple, demodulation.
Described humiture testing circuit C is mainly made up of temperature sensor RT, humidity sensor RH and fixed resistance R3 and capacitor C6, and Main Function is that the temperature and humidity of environment is converted to the signal of telecommunication.
Described MCU circuit D is mainly made up of integrated micro-chip processor U2 and quartz crystal oscillator Y2, and Main Function is that the signal of controlling after activation and the signal feedback of AM receipt decoding circuit B, FM modulation transmitter E and humiture testing circuit C is processed and transmission.
Described FM modulation transmitter E is made up of FM modulate emission chip U3 and quartz crystal oscillator Y3, and Main Function is that temperature, humidity information and temporal information that MCU circuit D is transmitted are modulated and be transferred to FM antenna circuit F by chip.
Described FM antenna circuit F is mainly made up of inductor L3, capacitor C17 and PCB coupling antenna C18, and Main Function is the radiofrequency signal of FM modulation transmitter E to be mated to antenna C18 by PCB convert electromagnetism wave amplitude to and be mapped in air and blaze abroad.
AM antenna circuit A:L1 is magnetic rod antenna, formed the capacitor C1 of a coupling in parallel on coil, composition parallel resonance antenna circuit by a cylindrical ferrite bar and one group of coil around bar magnet, resonance frequency is determined by the parameter of L1 and C1, the special AM long wave reception antenna frequently of composition.
AM receipt decoding circuit B: the signal of antenna feedback via AM receipt decoding chip U1 IN1, IN2 pin enter after chip, first chip U1 carries out signal amplification in inside, again by the frequency-selecting of standard quartz crystal oscillating circuit, after amplifying, signal is carried out to detection, demodulation again, again by the signal of RC mouth output decoding, the PO of AM decoding chip is chip controls pin, in the time that PO meets DN, and AM decoding chip activation work.
Humiture testing circuit C: the temperature and humidity of environment is converted to its equivalent resistance value by temperature sensor RT and humidity sensor RH, form equivalent RC oscillating circuit with C6, R3 and C6 also form a RC oscillating circuit simultaneously, convert the signal that integrated micro-chip processor can be distinguished to, carry out software computing and comparison.
MCU circuit D:Y2 quartz crystal oscillator is its accurate frequency of integrated micro-chip processor U2, integrated micro-chip processor U2 carrys out the precision of control time while walking by this frequency, integrated micro-chip processor U2 reads the RC frequency of oscillation of temperature, humidity circuit by pin 38,39,40,41, carry out becoming with computing, draw environment temperature and humidity; Integrated micro-chip processor U2 is by 44 foot control electric wave reception processed, when recording 44 pin and being set to low level, activate AM receipt decoding chip U1 work, AM receipt decoding chip U1 is transferred to integrated micro-chip processor U2 the signal of receipt decoding by 45 pin, and integrated micro-chip processor U2 is according to the synchronous inner time precision of the signal receiving; Integrated micro-chip processor U2 can cross 47 pin RF county of emission, in the time that 47 pin are low level, activate the work of FM modulate emission chip U3, the 46th human hair combing waste that FM modulate emission chip U3 activates backward integrated micro-chip processor U2 goes out synchronizing signal, signal is that low-voltage is effective, integrated micro-chip processor U2 receives after synchronizing signal, by the 48th pin and 49 pin, send and weave the coding that contains temperature, humidity and temporal information to FM modulate emission chip U3, by being wherein that 49 human hair combing wastes send packet, 48 human hair combing wastes send data clock.
FM modulation transmitter E: when integrated microprocessor U2 is after FM modulate emission chip U3 transmitted signal, FM modulate emission chip U3 is according to the instruction transmitting, the first pin by FM modulate emission chip U3 reads the reference frequency on Y3 quartz crystal oscillator, regulate inner clock frequency difference, set the transmission center frequency values of RF and the power of transmitting, and decomposite the packet that needs loading, after load-modulate, after inner amplification, be transported to FM antenna circuit F by 3 pin and 4 pin of FM modulate emission chip U3.
FM antenna circuit F:FM modulate emission chip U3 carries radiofrequency signal to PCB coupling antenna C18 from the 3rd pin and 4 pin, the radio circuit of FM mates antenna C18 loop by PCB and electric energy is converted to electromagnetic wave in air, transmits, and wherein inductor L3 and capacitor C17 work the spuious and multiple harmonic producing while filtering radio-frequency transmissions.
Power circuit G: power circuit is by the DC power supply of 3V and add at power supply the capacitor C19 and the C20 that strobe on road and form is mainly to provide stable electric power system to all electric loops.
Indicator light circuit H: integrated microprocessor U2, receiving after demodulation in time code signal, exports the instruction of synchronous signal to indicator light by the 42nd pin, prompting receives the quality of signal, if receive no signal, or signal is mixed and disorderly, signal lamp can indicate; And when integrated microprocessor U2 is in the instruction transmitting to FM transmitting modulation chip U3, carry synchronous indicating signal by the 43rd pin to indicator light circuit, prompting transmits.
Operation principle of the present invention:
1. radio wave clock receives:
Described MCU circuit D sends radio wave clock and receives instruction, excite in the AM of resting state receipt decoding circuit B, electromagnetic wave signal while receiving the school of launching at time service center by AM antenna circuit A, amplified after demodulation by AM receipt decoding circuit B, output MCU circuit D can debate after other signal, carry out software analysis, temporal information while reading school, the adjustment when time of this device is carried out to school, receiving signal simultaneously, MCU circuit D sends instruction to indicator light circuit H, prompting is receiving signal, after receiving successfully, MCU circuit D sends interrupt request singal, prompting decoding completes, send and stop receiving instruction to AM receipt decoding circuit B, make AM receipt decoding circuit B get back to again resting state, indicator light circuit H closes simultaneously.
2. humiture detects
The temperature and humidity of sending described MCU circuit D detects after instruction, activate humiture testing circuit C, temperature and humidity in atmosphere is by temperature sensor and humidity sensor, change into circuit and can debate other physical characteristic, convert MCU circuit D to by humiture testing circuit C and can debate other signal of telecommunication, by the in house software analytic operation of MCU circuit D, draw corresponding environmental data.
3. micropower short-distance wireless transmitting-receiving principle
Described MCU circuit D is successfully receiving standard time signal and is detecting after the humiture data of place environment, convert corresponding binary code to, by FM modulation transmitter E, carry out after signal FM modulation, by the electromagnetic wave after FM antenna circuit F transmitting modulation, realize the object of the transmission of data, in transmitting, MCU circuit D sends instruction to indicator light circuit H, and prompting transmits; After having launched, FM modulation transmitter E and indicator light circuit H get back to resting state.
Above-mentioned is the explanation of single circuit theory, all activates corresponding functional circuit module by MCU and realizes designing requirement, under the conventional time, all in resting state, reaches power saving effect.
Claims (7)
1. one kind effectively solves the method that indoor electric ripple time code signal receives, it is characterized in that: comprise AM antenna circuit (A), AM receipt decoding circuit (B), humiture testing circuit (C), MCU circuit (D), FM modulation transmitter (E), FM antenna circuit (F), power circuit (G), indicator light circuit (H), wherein:
(1), described MCU circuit (D) sends radio wave clock and receives instruction, excite in the AM of resting state receipt decoding circuit (B), electromagnetic wave signal while receiving the school of launching at time service center by AM antenna circuit (A), amplified after demodulation by AM receipt decoding circuit (B), output MCU circuit (D) can be debated after other signal, carry out software analysis, temporal information while reading school, the adjustment when time of this device is carried out to school, receiving signal simultaneously, MCU circuit (D) sends instruction to indicator light circuit (H), prompting is receiving signal, after receiving successfully, MCU circuit (D) sends interrupt request singal, prompting decoding completes, send and stop receiving instruction to AM receipt decoding circuit (B), make AM receipt decoding circuit (B) get back to again resting state, indicator light circuit (H) is closed simultaneously,
(2), described MCU circuit (D) sends after temperature and humidity detection instruction, activate humiture testing circuit (C), temperature and humidity in atmosphere is by temperature sensor and humidity sensor, change into circuit and can debate other physical characteristic, convert MCU circuit (D) to by humiture testing circuit (C) and can debate other signal of telecommunication, by the in house software analytic operation of MCU circuit (D), draw corresponding environmental data;
(3), described MCU circuit (D) is successfully receiving standard time signal and is detecting after the humiture data of place environment, convert corresponding binary code to, by FM modulation transmitter (E), carry out after signal FM modulation, by the electromagnetic wave after FM antenna circuit (F) transmitting modulation, realize the object of the transmission of data, in transmitting, MCU circuit (D) sends instruction to indicator light circuit (H), and prompting transmits; After having launched, FM modulation transmitter (E) and indicator light circuit (H) are got back to resting state;
(4), described power circuit (G) provides power supply for each circuit module.
2. the method that a kind of effective solution indoor electric ripple time code signal according to claim 1 receives, it is characterized in that: described AM antenna circuit (A) is mainly made up of coil bar magnet L1 and capacitor C 1, Main Function is that airborne electromagnetic wave is received and convert to radio signal transmission to AM receipt decoding circuit (B).
3. the method that a kind of effective solution indoor electric ripple time code signal according to claim 1 receives, it is characterized in that: described AM receipt decoding circuit (B) is mainly made up of AM receipt decoding chip U1 and low frequency standard quartz crystal oscillator Y1, Main Function is that the signal that AM antenna circuit (A) is received enters amplification, detection, demodulation.
4. the method that a kind of effective solution indoor electric ripple time code signal according to claim 1 receives, it is characterized in that: described humiture testing circuit (C) is mainly made up of temperature sensor RT, humidity sensor RH and fixed resistance R3 and capacitor C6, and Main Function is that the temperature and humidity of environment is converted to the signal of telecommunication.
5. the method that a kind of effective solution indoor electric ripple time code signal according to claim 1 receives, it is characterized in that: described MCU circuit (D) is mainly made up of integrated micro-chip processor U2 and quartz crystal oscillator Y2, Main Function is that the signal of controlling after activation and the signal feedback of AM receipt decoding circuit (B), FM modulation transmitter (E) and humiture testing circuit (C) is processed and transmits.
6. the method that a kind of effective solution indoor electric ripple time code signal according to claim 1 receives, it is characterized in that: described FM modulation transmitter (E) is made up of FM modulate emission chip U3 and quartz crystal oscillator Y3, Main Function is that temperature, humidity information and temporal information that MCU circuit (D) is transmitted are modulated and be transferred to FM antenna circuit (F) by chip.
7. the method that a kind of effective solution indoor electric ripple time code signal according to claim 1 receives, it is characterized in that: described FM antenna circuit (F) is mainly made up of inductor L3, capacitor C17 and PCB coupling antenna C18, Main Function is the radiofrequency signal of FM modulation transmitter (E) to be mated to antenna C18 by PCB convert electromagnetism wave amplitude to and be mapped in air and blaze abroad.
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| CN201110458702.0A CN102523011B (en) | 2011-12-31 | 2011-12-31 | Method for effectively realizing time-code signal receiving of indoor electric waves |
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| CN201110458702.0A CN102523011B (en) | 2011-12-31 | 2011-12-31 | Method for effectively realizing time-code signal receiving of indoor electric waves |
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| CN102523011B true CN102523011B (en) | 2014-07-02 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2497348Y (en) * | 2000-11-15 | 2002-06-26 | 柴超 | Time-calibrating control device |
| JP2004184199A (en) * | 2002-12-03 | 2004-07-02 | Citizen Watch Co Ltd | Electronic timepiece and control method of the same |
| CN1776547A (en) * | 2005-11-24 | 2006-05-24 | 陈德林 | Multifunctional electric wave clock and its display and voice reporting method |
| CN201556050U (en) * | 2009-10-20 | 2010-08-18 | 淳安千岛湖波菲特电子科技有限公司 | China radio wave clock |
| CN201803782U (en) * | 2010-07-07 | 2011-04-20 | 福州宜美电子有限公司 | Electronic scale with electric wave clock |
-
2011
- 2011-12-31 CN CN201110458702.0A patent/CN102523011B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2497348Y (en) * | 2000-11-15 | 2002-06-26 | 柴超 | Time-calibrating control device |
| JP2004184199A (en) * | 2002-12-03 | 2004-07-02 | Citizen Watch Co Ltd | Electronic timepiece and control method of the same |
| CN1776547A (en) * | 2005-11-24 | 2006-05-24 | 陈德林 | Multifunctional electric wave clock and its display and voice reporting method |
| CN201556050U (en) * | 2009-10-20 | 2010-08-18 | 淳安千岛湖波菲特电子科技有限公司 | China radio wave clock |
| CN201803782U (en) * | 2010-07-07 | 2011-04-20 | 福州宜美电子有限公司 | Electronic scale with electric wave clock |
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