CN112269312A - Automatic alignment device for wireless time service signals - Google Patents
Automatic alignment device for wireless time service signals Download PDFInfo
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- CN112269312A CN112269312A CN202011132990.6A CN202011132990A CN112269312A CN 112269312 A CN112269312 A CN 112269312A CN 202011132990 A CN202011132990 A CN 202011132990A CN 112269312 A CN112269312 A CN 112269312A
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
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Abstract
The invention discloses an automatic aligning device for wireless time service signals, belongs to the technical field of time service devices, and solves the problem that the existing BPM time service technology needs manual work to distinguish and align by means of ear hearing. The invention comprises the following steps: a wireless unit: the system comprises a base station, a modulation BPM wireless time service carrier signal and a data processing unit, wherein the modulation BPM wireless time service carrier signal is used for receiving a modulation BPM wireless time service carrier signal sent by a shore-based time service station; a demodulation unit: the device is used for demodulating the modulated BPM wireless time service carrier signal to obtain a BPM time service modulation signal; a signal acquisition unit: the device is used for carrying out digital processing on the BPM time service modulation signal to obtain a BPM digital waveform signal; an information processing unit: the system is used for identifying the BPM digital waveform signal according to the time pattern, acquiring an effective half-hour synchronization or whole-hour synchronization trigger signal, and calibrating the local system time; a display unit: for displaying a system time; a power supply unit: for supplying power. The invention provides an automatic time service and time alignment technology independent of a satellite navigation system, and has important military significance and practical value.
Description
Technical Field
A wireless time signal automatic alignment device is used for automatic alignment of time signals and belongs to the technical field of time devices.
Background
At present, although the time system technology is continuously developed, BPM long wave time service is sent based on a shore-based time service station, time service is carried out on time management equipment through remote information, and due to the independence and high reliability of the shore-based time service station, better equipment is not provided for replacing the time management equipment as one of the bottom-guaranteeing means of the time system technology. However, the conventional time service method has the following disadvantages: the method needs the hearing of a person to distinguish the sound at the time of the whole hour or the whole second of the time service, and then the clock is started at the time of the whole hour or the whole second of the half hour after the sound is distinguished (namely, the time alignment is manually realized). Therefore, the research on the automatic aligning device of the wireless time service signal does not need to be distinguished by human hearing, automatically carries out time alignment according to the time service information, improves the automation degree and the time service precision, and has very important significance and value in the era of 'e navigation'.
Disclosure of Invention
Aiming at the problems that in the prior art, the sound at the time of a whole time or a half-point whole second is difficult to distinguish by hearing, the accurate alignment is difficult and the automation degree is low, the invention provides an automatic alignment device of a wireless time service signal, which aims to: improve degree of automation, improve the time service precision.
In order to achieve the purpose, the invention adopts the following technical scheme:
an automatic alignment device for wireless time service signals, comprising:
an antenna unit: the system comprises a base station, a modulation BPM wireless time service carrier signal and a data processing unit, wherein the modulation BPM wireless time service carrier signal is used for receiving a modulation BPM wireless time service carrier signal sent by a shore-based time service station;
a demodulation unit: the device is used for demodulating the modulated BPM wireless time service carrier signal to obtain a BPM time service modulation signal;
a signal acquisition unit: the device is used for carrying out digital processing on the BPM time service modulation signal to obtain a BPM digital waveform signal;
a signal processing unit: the system is used for identifying the BPM digital waveform signal according to the time pattern, acquiring an effective half-hour synchronous or whole-hour synchronous signal and calibrating the local system time;
a display unit: for displaying a system time;
a power supply unit: used for supplying power to the demodulation unit, the signal acquisition unit, the display unit and the signal processing unit.
After the technical scheme is adopted, the antenna unit receives and receives a modulated BPM wireless time service carrier signal sent by a shore-based time service station, then the demodulation unit demodulates the modulated BPM wireless time service carrier signal to obtain a BPM time service modulated signal, the signal acquisition unit carries out digital processing on the BPM time service modulated signal to obtain a BPM digital waveform signal, the signal processing unit identifies the BPM digital waveform signal according to a time pattern to obtain an effective half-hour synchronous or hour synchronous signal, calibrates local system time, and synchronously displays the system time on the display unit. By adopting the invention, the time alignment can be automatically carried out according to the time service information without manually carrying out the time alignment after the sound at the time of the time service integral point or the time of the half point integral second is distinguished by the hearing of people, thereby improving the automation degree and the time service precision.
Preferably, the signal processing unit is connected with a control unit, and the control unit is connected with a power supply unit.
After the preferred scheme is adopted, the control unit can carry out the operations of startup, shutdown and reset on the time service device.
Preferably, the signal processing unit is provided with a communication interface for connecting with other time system systems.
With this preferred arrangement, the signal processing unit can provide time alignment to other timing systems at full second intervals through the communication interface.
Preferably, the antenna unit is a short-wave antenna with a contraction function.
Preferably, the display unit is connected with the signal processing unit and the power supply unit respectively.
Compared with the prior art, the invention has the beneficial effects that:
1. the antenna unit receives and receives a modulated BPM wireless time service carrier signal sent by a shore-based time service station, then the demodulation unit demodulates the modulated BPM wireless time service carrier signal to obtain a BPM time service modulated signal, the signal acquisition unit carries out digital processing on the BPM time service modulated signal to obtain a BPM digital waveform signal, the signal processing unit identifies the BPM digital waveform signal according to a time pattern to obtain an effective half-hour synchronous or whole-time synchronous signal, calibrates local system time, and synchronously displays the system time on the display unit. By adopting the invention, the time alignment can be automatically carried out according to the time service information without manually carrying out the time alignment after the sound at the time of the time service integral point or the time of the half point integral second is distinguished by the hearing of people, thereby improving the automation degree and the time service precision.
2. The control unit can be used for carrying out on-off and resetting operations on the time service device.
3. The signal processing unit may provide time alignment to other timing systems at full second intervals through the communication interface.
Drawings
FIG. 1 is a schematic diagram of a time service process according to the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments.
An automatic alignment device for wireless time service signals, comprising:
an antenna unit: the system comprises a base station, a modulation BPM wireless time service carrier signal and a data processing unit, wherein the modulation BPM wireless time service carrier signal is used for receiving a modulation BPM wireless time service carrier signal sent by a shore-based time service station;
a demodulation unit: the device is used for demodulating the modulated BPM wireless time service carrier signal to obtain a BPM time service modulation signal;
a signal acquisition unit: the device is used for carrying out digital processing on the BPM time service modulation signal to obtain a BPM digital waveform signal;
a signal processing unit: the system is used for identifying the BPM digital waveform signal according to the time pattern, acquiring an effective half-hour synchronous or whole-hour synchronous signal and calibrating the local system time;
a display unit: for displaying a system time;
a power supply unit: used for supplying power to the demodulation unit, the signal acquisition unit, the display unit and the signal processing unit.
A control unit: the device is used for carrying out switching on and off and resetting operations on the whole device.
The antenna unit is connected with the demodulation unit, the signal acquisition unit, the signal processing unit and the display unit in sequence, the power supply unit is connected with the demodulation unit, the signal acquisition unit, the display unit and the signal processing unit respectively, and the control unit is connected with the signal processing unit and the power supply unit respectively. And the signal processing unit is provided with a communication interface for connecting with other time system systems and is used for providing time alignment for the other time system systems.
In this embodiment, the antenna unit is a short wave antenna with a contraction function, the number of the sections is 11, the receiving range is 2 MHz-50 MHz, the contraction range is 24CM-150CM, and the maximum diameter is 11 mm. The demodulation unit is a demodulation unit commonly used in the art and is not described herein.
In this embodiment, the signal acquisition unit is a 1-channel 16-bit ADC, and has FPGA and DSP signal processing resources, and a frequency range: 66.8MHz-88.8 MHz.
In this embodiment, the signal processing unit includes a DDC controller, a filtering unit controlled by the DDC controller, and an AM signal demodulation unit, where the filtering unit is configured to perform filtering processing on a BPM digital waveform signal; the AM signal demodulation unit is used for demodulating the signals processed by the filtering unit to obtain BPM audio signals, the signal acquisition unit is used for carrying out digital processing on the BPM time service modulation signals to obtain BPM digital waveform signals, the signal processing unit is used for identifying the BPM digital waveform signals according to time pattern to obtain effective half-hour synchronization or hour synchronization signals, meanwhile, system time synchronization is aligned to half-hour or 1 hour, then time precision maintenance is carried out by a high-precision real-time clock (RTC) of the signal processing unit, and time is output at intervals of a whole second through an RS232 serial port to provide accurate time reference for other time system systems.
Examples
The invention has the function of receiving the BPM wireless time service carrier signal transmitted by the short wave time service station of the Shanxi astronomical table of the Chinese academy of sciences, and can receive four signals of 2.5MHz, 5MHz, 10MHz and 15 MHz. The antenna unit (namely a stretching antenna in figure 1) receives and modulates a BPM wireless time service carrier signal, the modulated BPM wireless time service carrier signal is demodulated by a demodulation unit to obtain a BPM time service modulation signal, the signal acquisition unit carries out digital processing on the BPM time service modulation signal to obtain a BPM digital waveform signal, the signal processing unit identifies the BPM digital waveform signal according to a time signal pattern to obtain an effective half-hour synchronization or whole-hour synchronization signal, simultaneously aligns system time synchronization to half hour or whole hour, then carries out time precision maintenance by a high-precision real-time clock (RTC) of the signal processing unit, synchronously displays on an LCD screen (namely a display unit in figure 1), outputs at intervals of whole second through a communication interface, and provides time alignment for other system systems (namely time output in figure 1).
Further describing the time alignment mechanism of the embodiment, the system time error maintained by the high-precision real-time clock RTC of the signal processing unit generally does not exceed 5 minutes, for example, when the system time 2020-08-0803: 05:00 receives a half-hour or full-hour synchronization signal sent by the BPM service desk, the system time is automatically synchronized to 2020-08-0803: 00:00, and the full-hour alignment is determined; if the system time 2020-08-0803: 35:00 receives a half-hour or full-time synchronization signal sent by a BPM time service station, the system time is automatically synchronized to 2020-08-0803: 30:00, and the alignment is judged to be half an hour; the future system time accuracy is maintained by the high accuracy real time clock RTC of the signal processing unit until the next calibration.
In this embodiment, the display unit is an LCD display screen, and the LCD screen is used for synchronously displaying the time output by the RS232 serial port at the interval of a second.
In this embodiment, the power supply unit is a 4-string 4-parallel battery pack formed by commercially available 18650 batteries, and is fully charged with 16.8V and 10400mAH in capacity. Calculated according to the total power consumption of the system of 20W, the system can continuously work for about 7 hours, and the requirement of 6-hour working time is met. And meanwhile, a standard power adapter of 19.5V @4.7A is matched for charging, so that the charging can be effectively guaranteed, and power can be supplied to the equipment at the same time.
The above are merely representative examples of the many specific applications of the present invention, and do not limit the scope of the invention in any way. All the technical solutions formed by the transformation or the equivalent substitution fall within the protection scope of the present invention.
Claims (5)
1. An automatic alignment device for wireless time service signals, comprising:
an antenna unit: the system comprises a base station, a modulation BPM wireless time service carrier signal and a data processing unit, wherein the modulation BPM wireless time service carrier signal is used for receiving a modulation BPM wireless time service carrier signal sent by a shore-based time service station;
a demodulation unit: the device is used for demodulating the modulated BPM wireless time service carrier signal to obtain a BPM time service modulation signal;
a signal acquisition unit: the device is used for carrying out digital processing on the BPM time service modulation signal to obtain a BPM digital waveform signal;
a signal processing unit: the system is used for identifying the BPM digital waveform signal according to the time pattern, acquiring effective second synchronization, minute synchronization, half-hour synchronization and hour synchronization, and calibrating the local system time;
a display unit: for displaying a system time;
a power supply unit: used for supplying power to the demodulation unit, the signal acquisition unit, the display unit and the signal processing unit.
2. The device of claim 1, wherein the signal processing unit is connected to a control unit, and the control unit is connected to a power supply unit.
3. The device as claimed in claim 1, wherein the signal processing unit is provided with a communication interface for connecting with other timing systems.
4. The device of claim 1, wherein the antenna unit is a short wave antenna with a shrinking function.
5. The device of claim 1, wherein the display unit is connected to the signal processing unit and the power supply unit, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011132990.6A CN112269312A (en) | 2020-10-21 | 2020-10-21 | Automatic alignment device for wireless time service signals |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011132990.6A CN112269312A (en) | 2020-10-21 | 2020-10-21 | Automatic alignment device for wireless time service signals |
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| CN112269312A true CN112269312A (en) | 2021-01-26 |
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| CN202011132990.6A Withdrawn CN112269312A (en) | 2020-10-21 | 2020-10-21 | Automatic alignment device for wireless time service signals |
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Citations (6)
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| CN101976038A (en) * | 2010-09-14 | 2011-02-16 | 广东美的电器股份有限公司 | Time self-calibration air conditioner and time self-calibration control method thereof |
| CN206948336U (en) * | 2017-06-09 | 2018-01-30 | 西安宏泰时频技术有限公司 | A kind of small-sized BPM shortwaves time service control system and control board |
| CN109270831A (en) * | 2018-11-21 | 2019-01-25 | 中国科学院国家授时中心 | BPM shortwave multifrequency point timing system |
| CN109669341A (en) * | 2018-12-27 | 2019-04-23 | 四川九洲电器集团有限责任公司 | A method of when acquisition BPM short-wave signal carries out display and school |
| CN210578509U (en) * | 2020-01-10 | 2020-05-19 | 西安空天电子技术有限公司 | BPM shortwave time service monitoring receiver |
| CN111638640A (en) * | 2020-05-27 | 2020-09-08 | 中国科学院国家授时中心 | BPM shortwave time service signal simulator |
-
2020
- 2020-10-21 CN CN202011132990.6A patent/CN112269312A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976038A (en) * | 2010-09-14 | 2011-02-16 | 广东美的电器股份有限公司 | Time self-calibration air conditioner and time self-calibration control method thereof |
| CN206948336U (en) * | 2017-06-09 | 2018-01-30 | 西安宏泰时频技术有限公司 | A kind of small-sized BPM shortwaves time service control system and control board |
| CN109270831A (en) * | 2018-11-21 | 2019-01-25 | 中国科学院国家授时中心 | BPM shortwave multifrequency point timing system |
| CN109669341A (en) * | 2018-12-27 | 2019-04-23 | 四川九洲电器集团有限责任公司 | A method of when acquisition BPM short-wave signal carries out display and school |
| CN210578509U (en) * | 2020-01-10 | 2020-05-19 | 西安空天电子技术有限公司 | BPM shortwave time service monitoring receiver |
| CN111638640A (en) * | 2020-05-27 | 2020-09-08 | 中国科学院国家授时中心 | BPM shortwave time service signal simulator |
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| CHAOZHONG YANG ET AL.: "Research and design of frequency synthesizer for BPM timing simulator", 《IEEE XPLORE》 * |
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Application publication date: 20210126 |