KR20020092081A - Device for Correcting time error of Marine Master Clock using Global Positioning System - Google Patents

Abstract

PURPOSE: An apparatus for correcting a time of a main clock for ship by using a GPS(Global Positioning System) is provided to receive a current time from a plurality of GPS satellites and correct automatically the time of a main clock and a sub clock within a ship by using a time correction device including a self crystal oscillator. CONSTITUTION: A reception circuit is connected with a GPS antenna(1). A microprocessor(2) is used for processing timing data of the reception circuit. A GPS signal is inputted to the reception circuit through the GPS antenna(1). The microprocessor(2) outputs a communication signal to a regulator(3) and a frequency converter. A time correction portion(10) has a noise removal filter(5) for obtaining a stable voltage and a satellite navigation system(6) for comparing coordinates of a correction reference station with coordinates of a base station and obtaining an error correction value thereby. A self crystal oscillator portion(9) receives the timing data and position data and transmits the received data to the microprocessor(2). The microprocessor(2) is connected with a plurality of driver portions(8,8a,8b). The driver portions(8,8a,8b) changes an input time of the microprocessor(2) and outputs a current time. A plurality of amplifier portions(4,4a,4b) correspond to the plural driver portions(8,8a,8b).

Description

Device for Correcting time error of Marine Master Clock using Global Positioning System}

The present invention relates to an automatic time correction apparatus for a ship's mother watch using GPS.

In particular, the present invention is the time correction device of the ship's time clock using a GPS (GPS) provided so that the time of the time clock and the self-clock in the ship can be automatically corrected to the corresponding time when the ship passes the time change line during navigation It is about.

In general, the ship time display apparatus using a GPS (Global Positioning System) is largely the main controller for controlling the time information received from the GPS antenna; Master clock, which is a standard time supply device that calculates various times by receiving time and position information from GPS; And a slave clock displaying a predetermined time through the time information provided from the master clock, thereby expressing the time in the ship.

However, such a device provides only the time of the chronometer which is installed in the ship and shows only international standard time even if the ship passes the time change line during the voyage. It includes inaccuracies along with the hassle of having to readjust and manually display the standard time of major countries with multiple clocks and compare the current time with the standard time of the ship during final navigation.

Therefore, there is an urgent need for the provision of a system capable of automatically changing the ship's mother clock or the self-clock to the corresponding time every time the vehicle passes the time change line.

Therefore, the present invention receives the current time from a plurality of GPS satellites when the ship passes the time change line during the voyage self-corrected oscillation unit to be automatically corrected to the time zone of the time zone and the self-clock in the ship Equipped with the included time correction device, it eliminates the need to adjust the local time every time it passes through the time change line, providing a time correction device for ship's mother-of-pearl watch which can secure high reliability due to its usefulness and accuracy. Has a purpose.

1 is a block diagram showing an automatic correction apparatus for a ship's mother watch combined with the GPS receiver of the present invention.

* Description of the symbols for the main parts of the drawings *

1: GPS antenna 2: Micro process

3: regulator 4,4a, 4b: amplifier

5: noise reduction filter 6: satellite navigation correction system

7: Hourglass 8,8a, 8b: drive unit

9: crystal oscillation unit 10: time correction device

In order to achieve the above object, the present invention receives a GPS signal through a satellite navigation correction system, receives a communication signal with an indicator indicating a synchronized time, and associates a timing indicator with timing data in a GPS receiver, and then the GPS signal. GPS receiver for receiving the satellite positioning information determined from the; A microprocessor for comparing the received timing data with the positioning information and calculating a correction value for the current time when the ship passes the time change line; A driving unit for driving forward and backward driving of the clock with different unit times, respectively; And it is characterized by the technical idea that the amplification unit.

The visual correction apparatus of the present invention can be reproduced in a better state through the preferred embodiment described below.

1 is a block diagram of the automatic calibration device according to the present invention.

First, a GPS receiver, which is given a role of a combined GPS, a communication receiver, and a transmitter to receive GPS signals transmitted from a plurality of satellites orbiting in orbit, is a signal received through a communication link as well as a function required for GPS signal processing. It is provided with a predetermined circuit necessary for processing.

In addition, the GPS receiver includes a stage of the GPS receiver including a receiving circuit and a communication transmitter / receiver.

The receiving circuit is coupled to the GPS antenna 1, and the GPS signal is input to the receiving circuit for obtaining the PN code via the above-mentioned GPS antenna 1.

The timing data generated by the receiving circuit will be processed by the microprocessor 2 for transmission of the transceiver, wherein the communication transceiver includes a transmit / receive switch for routing the communication signal.

The received communication signal is input to a communication receiver and passes through the microprocessor 2 for processing.

The signal transmitted from the microprocessor 2 proceeds to the regulator 3 and the frequency converter, and the gain of the signal is increased to an appropriate level through the amplifiers 4, 4a and 4b, and the combined GPS of the GPS receiver is increased. The timing data generated by the receiving circuit via the communication system is transmitted and processed via the communication link.

The time correction device 10 of the present invention provides a noise removing filter 5 to suppress the influence of the normal voltage which is never desirable in the correction to the time, so that a more stable voltage is introduced, and also the satellite navigation correction. With the system 6, the coordinate reference station that accurately measures the position of the vessel is compared with the coordinates calculated by satellite navigation and the precise coordinates of the reference station, and the error correction value is received through medium frequency broadcasting.

When the timing data and the positioning data are received through the GPS receiver, the data received by the self-correcting oscillation unit 9 is input to the microprocessor 2, and the data input to the microprocessor 2 is due to the navigation of the ship. When the position of the ship passes the time change line compared with the positioning data received from the satellite, the time of the mother clock 7 installed in the ship is changed and corrected to the current time by the corresponding time.

The microprocessor 2 is connected to each of the driving units 8, 8a and 8b for forward and backward driving the second hand, minute hand and hour hand of the clock to change the time.

Each of the driving units 8, 8a and 8b is changed and driven to the time input from the micro process 2 so that the current time passing through the time change line can be displayed on the mother clock or the clock in the ship. If the voyage of the ship is heading east, the hour advances by 1 hour for every 15 degrees longitude, and the local time is changed to 5 pm at 4 pm. If the local time is 4 pm, it will be changed to 3 pm.

At this time, the second hand drive unit 8 is driven in 0.5 second units to maintain a precise new unit, and the minute hand drive unit 8a is driven in 30 second units in each drive unit receiving the power source of the stepping motor. In the case where the amount of time correction is large in units of seconds, it is considered that the time can be corrected within a shorter time, and the hour hand driver 8b can be corrected through a cloud of the minute hand driver 8a.

Of course, each of the driving units 8, 8a and 8b has a corresponding amplifier 4, 4a and 4b, which is considered to enable fast time correction within a shorter time.

Therefore, the present invention having the above structural system receives the current time from the GPS satellites in a timely manner when the ship in transit passes the time-shifting line and automatically corrects the time zone of the mother and child clocks in the vessel. It is possible to perform the work quickly and accurately, and it has the utility to realize economical usefulness and reliability in use without requiring any change and correction work.

On the other hand, the present invention has been referred to only the best embodiments thereof, but it is obviously not limited to this, it will be obvious that it can be carried out without departing from the scope of the claims within the scope of the present invention.

Claims (1)

Receives GPS signal through satellite navigation correction system, receives communication signal with indicator indicating synchronized time, and receives GPS positioning information determined from GPS signal after associating timing data with timing indicator in GPS receiver GPS receiver for; A microprocessor for comparing the received timing data with the positioning information and calculating a correction value for the current time when the ship passes the time change line; A driving unit for driving forward and backward driving of the clock with different unit times, respectively; And a visual amplification unit for ship's mother-of-the-clock using GPS, characterized in that it comprises an amplifier.