CN108255048A - Based on the underwater time calibration inductively communicated and synchronization system and method - Google Patents
Based on the underwater time calibration inductively communicated and synchronization system and method Download PDFInfo
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- CN108255048A CN108255048A CN201810232360.2A CN201810232360A CN108255048A CN 108255048 A CN108255048 A CN 108255048A CN 201810232360 A CN201810232360 A CN 201810232360A CN 108255048 A CN108255048 A CN 108255048A
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- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G7/00—Synchronisation
-
- 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
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
- H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Electric Clocks (AREA)
Abstract
The invention discloses a kind of based on the underwater time calibration inductively communicated and synchronization system and method, the system includes plastic wirerope and has the function of underwater instrument inductively, underwater instrument is coupling on plastic wirerope, floating ball group is provided on plastic wirerope, the bottom end of plastic wirerope is connected by acoustic releaser with gravity anchor；The underwater instrument is arranged to 1 host for having the function of to send and receive time signal and several do not have sending time semiotic function but the slave with receiving time semiotic function.Host periodically sends a time calibration signal by way of sensing to slave in the system, slave is modified the clock (such as atomic clock system) of internal high-precision, Low Drift Temperature after receiving signal, to ensure the punctual precision inside each slave system.Cable communication is not needed to, therefore the system placement is flexible, at low cost, operation on the sea risk is small using the instrument of inductively communication system.
Description
Technical field
The present invention relates to a kind of oceanographic instrumentation underwater time calibrations and synchronization system and method, concretely relate to one kind
Based on the underwater time calibration inductively communicated and synchronization system and method.
Background technology
When oceanographic instrumentation carries out long-term ocean weather station observation under water, it can not directly pass through GPS or NTP (Network Time
Protocol) its internal system time is calibrated, larger time error can be generated for a long time under water by laying.This makes needs
Underwater observation is carried out with high Perfect Time parameter or acoustic sounding causes great technical bottleneck.For example, conventional acoustic instrument
(such as hydrophone) mainly carries out time synchronization, but the use cost pole of submerged cable by submerged cable to multiple underwater instruments
Height, and instrument is fixed on by way of vulcanization on submerged cable, instrumented site can not adjust.
Invention content
Based on above-mentioned technical problem, the present invention provides a kind of based on the underwater time calibration inductively communicated and synchronous system
System and method.
The adopted technical solution is that：
It is a kind of based on the underwater time calibration inductively communicated and synchronization system, including plastic wirerope and with sensing coupling
The underwater instrument of function is closed, underwater instrument is coupling on plastic wirerope, and floating ball group is provided on plastic wirerope, plastic wirerope
Bottom end is connected by acoustic releaser with gravity anchor；The underwater instrument be arranged to 1 have send and receive time signal
The host of function and several slaves without sending time semiotic function but with receiving time semiotic function.
Preferably, the host includes the first real time clock data logger, the first oscillator clock, first microprocessor
With first inductively adjuster, the first real time clock data logger connect with the first oscillator clock, during the first oscillator
Clock is connect with first microprocessor, first microprocessor with first inductively adjuster connect, the first inductively adjuster
On be configured with the first inductively magnet ring；The slave includes the second inductively adjuster, the second microprocessor, the second oscillation
Device clock and the second real time clock data logger, second is inductively configured with the second inductively magnet ring, packet on adjuster
Plastic-steel cable from first inductively magnet ring and second inductively pass through in magnet ring, the second inductively adjuster and second micro- place
Device connection is managed, the second microprocessor is connect with the second oscillator clock, and the second oscillator clock connects the second real time clock data
Logger.
Preferably, the underwater instrument includes hydrophone and conductivity-temperature-depth system.
It is a kind of based on the underwater time calibration inductively communicated and synchronous method, using above-mentioned system, step is as follows：
Plastic wirerope passes through the magnet ring of host and slave, some is exposed in the seawater at both ends, and one is formed with seawater
A closed circuit；Host sending time signal is added to by carrier wave on the armature winding of host magnet ring, then in plastic wirerope and sea
Electric current is induced in water circuit in series, electric current is transferred to by plastic wirerope at slave, on slave magnet ring it is secondary around
Group induces electromotive force, and is transported to slave and is demodulated to obtain the time signal that host transmits.
Specifically：
Internal clock time is transferred to first microprocessor by host, and time signal is transferred to first by first microprocessor
Inductively adjuster, and inductively mode is transferred to slave by plastic wirerope；
After slave receives signal, internal second microprocessor using the time signal that host transmits to the clock of slave into
Row adjustment.
Above-mentioned host is calibrated by receiving GPS time signal.
More specifically：
After system enters water, host sent a time calibration signal every 24 hours to slave, for slave time school
It is accurate；Inside host first inductively adjuster by plastic wirerope with the interval of 1s to slave continuously transmit one it is accurate
1-PPS signal sequences；Due to time signal in transmission process can by noise jamming, in order to accurately distinguish effective time signal and
Noise signal, slave look for the effectively continuous signal of the third from host automatically；Deviate 1-PPS signals when the signal period
0.8% section, then it is assumed that the entire sequences of pulsed signals received is invalid signals；When the sequences of pulsed signals and master that receive
The 1-PPS signal sequences of machine exactly match, then it is assumed that the signal is effective time calibration signal；
Slave is waken up after receiving effective time calibration signal sequence, and the second internal microprocessor accounts for generation
Sky is than the 1-PPS signal sequences for 50%；Slave is modified internal electronic clock using these signals, and internal the
Two real time clock data loggers calculate the 1-PPS signal sequences of revised electronic clock, convert it into 1s's
Step-by-step counting, and pass through these step-by-step countings and complete calibration of the slave to the time.
Preferably, before system enters water, during by GPS time and 1-PPS signals to the internal electrons of all underwater instruments
Clock time is set time；1-PPS refers to GPS second pulse signal, and the period for defining pulse is one second primary, and 1-PPS is equal to 1HZ.
Preferably, make sequences of pulsed signals that slave receives and the 1-PPS sequences of host by increasing the delay of 860ms
Signal Matching.
Preferably, the real time clock data logger inside underwater instrument turns the 1-PPS signals that electronic clock receives
For digital signal pattern and file is stored as, when later data is handled, calculating error correction is carried out using this document.
The method have the benefit that：
Present invention proposition is a kind of based on the underwater clock synchronization system inductively communicated and method, and underwater instrument is coupling in
On plastic wirerope, host periodically sends a time calibration signal by way of sensing to slave, after slave receives signal
The clock (such as atomic clock system) of internal high-precision, Low Drift Temperature is modified, to ensure the punctual essence inside each slave system
Degree.Cable communication is not needed to, therefore the system placement is flexible, at low cost, extra large using the instrument of inductively communication system
Upper operating risk is small.
Description of the drawings
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings：
Fig. 1 is the present invention is based on the underwater time calibration inductively communicated and the overall structure diagrams of synchronization system；
Fig. 2 is the structural principle block diagram of host and slave in present system；
Fig. 3 is inductively transmission circuit schematic diagram；
Fig. 4 is time calibration schematic diagram of the host to slave.
Specific embodiment
As shown in Figure 1, it is a kind of based on the underwater time calibration inductively communicated and synchronization system, including plastic wirerope 1
With there is underwater instrument 2 inductively, underwater instrument 2 is coupling on plastic wirerope 1.It is provided on plastic wirerope 1
Floating ball group 3, the bottom end of plastic wirerope 1 are connected by acoustic releaser 4 with gravity anchor 5.The underwater instrument 2 include hydrophone and
A variety of ocean measuring instruments such as conductivity-temperature-depth system.The underwater instrument is divided into or is set as 1 to be believed with the time is sent and received
The host of number function and several do not have sending time semiotic function but the slave with receiving time semiotic function.Such as
Hydrophone can be set, and for host, conductivity-temperature-depth system is slave；Certainly conductivity-temperature-depth system is may also set up as host, and hydrophone is slave.
As the further design to the present invention, as shown in Fig. 2, the host is recorded including the first real time clock data
The inductively adjuster of device, the first oscillator clock, first microprocessor and first, the first real time clock data logger and
One oscillator clock connects, and the first oscillator clock is connect with first microprocessor, and first microprocessor and first is inductively
Adjuster connects, and first is inductively configured with the first inductively magnet ring on adjuster.The slave includes the second sensing coupling
Adjuster, the second microprocessor, the second oscillator clock and the second real time clock data logger are closed, second is inductively adjusted
Be configured with the second inductively magnet ring on device, plastic wirerope from first inductively magnet ring and second inductively wear in magnet ring
Cross, second inductively adjuster connect with the second microprocessor, the second microprocessor is connect with the second oscillator clock, second
Oscillator clock connects the second real time clock data logger.
During carrying out practically, internal clock time is transferred to first microprocessor by host, and first microprocessor will be believed the time
Number it is transferred to the first inductively adjuster, and inductively mode is transferred to slave by plastic wirerope.Slave receives letter
After number, internal second microprocessor is adjusted the clock of slave using the time signal that host transmits.Host passes through reception
GPS time signal is calibrated.
The principle that the present invention inductively communicates is equivalent to transformer, as shown in figure 3, plastic wirerope passes through host and slave
Magnet ring, both ends have that sub-fraction is exposed in the seawater, a closed circuit are formed with seawater.Host sending time signal leads to
It crosses electromotive force carrier wave to be added on the armature winding of circular magnetic loop Tl of host, then in plastic wirerope and seawater circuit in series
In induce electric current.Electric current is transferred to by plastic wirerope at slave, and the secondary windings on the circular magnetic loop T2 of slave induces
Electromotive force E0, E0Slave is transported to be demodulated to obtain the time signal that host transmits.
It is a kind of based on the underwater time calibration inductively communicated and synchronous method, using above-mentioned system, specific steps
It is as follows：
Equipment can not receive GPS signal under water, therefore before submerged buoy system enters water, pass through GPS time and 1-PPS
(Pulse Per Second) signal sets time the internal electron clock time of all underwater instrument units.1-PPS refers to
GPS second pulse signal, the period for defining pulse are one second primary, and 1-PPS is equal to 1HZ.
After equipment enters water, host sent a time calibration signal every 24 hours to slave, for slave time school
It is accurate.Inductively modulation module inside host continuously transmits an accurate 1- with the interval of 1s by plastic wirerope to slave
PPS signal sequence.Since time signal can be by noise jamming, in order to accurately distinguish effective time signal and make an uproar in transmission process
Sound signal, slave look for the effectively continuous signal (b in such as Fig. 4) of the third from host automatically.Deviate when the signal period
0.8% section (0.992s of 1-PPS signals<ΔT<1.008s), then it is assumed that the entire sequences of pulsed signals received is invalid
Signal.When the 1-PPS signal sequences of the sequences of pulsed signals and host that receive exactly match, then it is assumed that the signal is effective
Time calibration signal.
Slave is waken up after receiving effective time calibration signal sequence, and internal hardware processor will generate duty
Than the 1-PPS signal sequences for 50%.Slave is modified internal electronic clock using these signals, internal data
Logger calculates the 1-PPS signal sequences of revised electronic clock, converts it into the step-by-step counting of 1s, and passes through
Calibration of the slave to RTC (Real-Time Clock) times is completed in these step-by-step countings (per 128s, calibration is primary).
The pulse signal of host, which sends and is received, needs the regular hour, the pulse signal received so as to cause slave
There is the delay (c in such as Fig. 4) of about 140ms ± 2ms.In addition, (such as scheme in order to facilitate the sequences of pulsed signals that slave receives
D in 4) matching with the 1-PPS sequence signals (a in such as Fig. 4) of host, can increase the delay of 860ms makes between two signals
It is aligned (e in such as Fig. 4).
Mainly there are two aspects in the time error source of present system.On the one hand it is the real time clock data when instrument internal
Logger is restarted when being lost with pulse-counting data, and underwater instrument recalculates arteries and veins by the basis of the current RTC time of instrument
Punching, which counts, carries out time calibration, and leading to the slave time, there are certain errors with host time.On the other hand it is instrument internal
Data logger can sometimes malfunction when calculating step-by-step counting, cause result of calculation inaccurate.In order to solve these problems, instrument
The 1-PPS signals that electronic clock receives can be switched to digital signal pattern and be stored as file by internal data logger, side
Just when later data is handled, calculating error correction is carried out using this document.
Claims (10)
- It is 1. a kind of based on the underwater time calibration inductively communicated and synchronization system, it is characterised in that：Including plastic wirerope and There is underwater instrument inductively, underwater instrument is coupling on plastic wirerope, and floating ball group is provided on plastic wirerope, The bottom end of plastic wirerope is connected by acoustic releaser with gravity anchor；The underwater instrument, which is arranged to 1, to be had transmission and connects The host of semiotic function and several do not have sending time semiotic function but with receiving time semiotic function between time receiving Slave.
- It is 2. according to claim 1 a kind of based on the underwater time calibration inductively communicated and synchronization system, feature It is：The host includes the first real time clock data logger, the first oscillator clock, first microprocessor and the first sensing Adjuster is coupled, the first real time clock data logger connect with the first oscillator clock, the first oscillator clock and first micro- Processor connects, first microprocessor with first inductively adjuster connect, first is inductively configured with the on adjuster One inductively magnet ring；The slave includes the second inductively adjuster, the second microprocessor, the second oscillator clock and the Two real time clock data loggers, second is inductively configured with the second inductively magnet ring on adjuster, and plastic wirerope is from One inductively magnet ring and second inductively pass through in magnet ring, second inductively adjuster connect with the second microprocessor, Second microprocessor is connect with the second oscillator clock, and the second oscillator clock connects the second real time clock data logger.
- It is 3. according to claim 1 a kind of based on the underwater time calibration inductively communicated and synchronization system, feature It is：The underwater instrument includes hydrophone and conductivity-temperature-depth system.
- 4. it is a kind of based on the underwater time calibration inductively communicated and synchronous method, using any power in such as claim 1-3 The profit requirement system, it is characterised in that step is as follows：Plastic wirerope passes through the magnet ring of host and slave, some is exposed in the seawater at both ends, and forming one with seawater closes Close circuit；Host sending time signal is added to by carrier wave on the armature winding of host magnet ring, then in plastic wirerope and seawater string Join in the circuit formed and induce electric current, electric current is transferred to by plastic wirerope at slave, the secondary windings sense on slave magnet ring Electromotive force should be gone out, and be transported to slave and be demodulated to obtain the time signal that host transmits.
- It is 5. according to claim 4 a kind of based on the underwater time calibration inductively communicated and synchronous method, feature It is：Internal clock time is transferred to first microprocessor by host, and time signal is transferred to the first sensing by first microprocessor Adjuster is coupled, and inductively mode is transferred to slave by plastic wirerope；After slave receives signal, internal second microprocessor adjusts the clock of slave using the time signal that host transmits It is whole.
- It is 6. according to claim 4 a kind of based on the underwater time calibration inductively communicated and synchronous method, feature It is：Host is calibrated by receiving GPS time signal.
- It is 7. according to claim 4 a kind of based on the underwater time calibration inductively communicated and synchronous method, feature It is, is specifically carried out using following steps：After system enters water, host sent a time calibration signal every 24 hours to slave, for slave time calibration；It is main Inside machine first inductively adjuster one accurate 1-PPS is continuously transmitted to slave with the interval of 1s by plastic wirerope Signal sequence；Since time signal can be by noise jamming, in order to accurately distinguish effective time signal and noise in transmission process Signal, slave look for the effectively continuous signal of the third from host automatically；Deviate 1-PPS signals when the signal period 0.8% section, then it is assumed that the entire sequences of pulsed signals received is invalid signals；When the sequences of pulsed signals and master that receive The 1-PPS signal sequences of machine exactly match, then it is assumed that the signal is effective time calibration signal；Slave is waken up after receiving effective time calibration signal sequence, and the second internal microprocessor will generate duty ratio For 50% 1-PPS signal sequences；Slave is modified internal electronic clock using these signals, and internal second is real Shi Shizhong data logger calculates the 1-PPS signal sequences of revised electronic clock, converts it into the pulse of 1s It counts, and passes through these step-by-step countings and complete calibration of the slave to the time.
- It is 8. according to claim 7 a kind of based on the underwater time calibration inductively communicated and synchronous method, feature It is：Before system enters water, the internal electron clock time of all underwater instruments is carried out by GPS time and 1-PPS signals Pair when；1-PPS refers to GPS second pulse signal, and the period for defining pulse is one second primary, and 1-PPS is equal to 1HZ.
- It is 9. according to claim 7 a kind of based on the underwater time calibration inductively communicated and synchronous method, feature It is：The sequences of pulsed signals that slave receives is made to be matched with the 1-PPS sequence signals of host by the delay for increasing 860ms.
- It is 10. according to claim 7 a kind of based on the underwater time calibration inductively communicated and synchronous method, feature It is：The 1-PPS signals that electronic clock receives are switched to digital signal by the real time clock data logger inside underwater instrument Pattern is simultaneously stored as file, and when later data is handled, calculating error correction is carried out using this document.
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| CN110085015A (en) * | 2019-05-09 | 2019-08-02 | 广东省水文局韶关水文分局 | A kind of collecting method and data collection system for hydrologic monitoring |
| CN111245546A (en) * | 2020-01-08 | 2020-06-05 | 中国海洋大学 | Link type one-transmitting multi-receiving submarine node high-precision time service system |
| CN112804022A (en) * | 2021-01-11 | 2021-05-14 | 深圳诺康医疗科技股份有限公司 | Multi-source signal synchronization system and method thereof |
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