JPS6014312B2 - Coordinate setting method of hyperbolic navigation device - Google Patents

Description

[Detailed description of the invention] In hyperbolic navigation devices such as Loran or Omega,
In addition to simply displaying the vessel's current position in latitude and longitude coordinates, by writing the navigation destination position into the storage device in advance, it calculates the distance, arrival time, course, etc. to that position, and also automatically steers the ship. It is also possible to do the following.

However, in some cases, it is difficult to set the target location using latitude and longitude values, and in other cases, it is difficult to set it based on the arrival time difference between the radio waves emitted from the master station and the slave station. After selecting one of them,
It was necessary to set numerical values. Therefore, the operation is complicated and operation errors are likely to occur. The present invention provides a configuration scheme that does not have the drawbacks mentioned above. FIG. 1 is a diagram showing an example of the configuration of a hyperbolic navigation device to which the method of the present invention is applied, and FIG. 2 is a diagram showing a part of the configuration of FIG. 1 in detail.

In this way, the central processing unit CP has a fixed storage device ROM that stores calculation programs, etc., a device RAM 1 that temporarily stores numerical values during calculations, and a temporary storage that stores setting values such as the ship's navigation target position. The hyperbolic navigation receiver N is connected to the device RAM2 etc. via the interface IFI.
Connect S, and also connect interfaces IF2, IF3, and I
H, etc. are connected to the display DS, target position setting device SET, and work changeover device via F4, etc. That is, the receiver NS adds, for example, the arrival time difference between the radio waves emitted from the main station and the slave station at fixed time intervals to the central processing unit CPU', and the processing unit CPU, in cooperation with the storage devices ROM and RAM, calculates the difference in latitude and・Convert to longitude signal. Therefore, if the date is set to an appropriate position on the switch, latitude and longitude signals indicating the current position of the ship will be displayed on the display DP. FIG. 2 is a diagram showing the detailed configuration of the target position setter SET, in which the 6-digit thumbwheel switches S1, S
2,...S6 and a similar switch B for specifying a memory address are further provided with a selection pulse generator P, a "0" detector K, and a switching switch GW for north latitude and south latitude, east longitude and west longitude. There is.

That is, when setting the destination destination position of the ship, first the address in the storage device RAM2 is set on the thumbwheel switch B. Next, if you want to set latitude and longitude,
First, the latitude is set on the thumbwheel switches SI, S2...S6. In this case, the highest switch SI is in units of 100 degrees, S2 and S3 are in units of 10 degrees and 1 degree, respectively, and S4, S5, and S6 are in units of 1 piece, 1 minute, and 10 seconds, respectively. Therefore, for example, 35o spot '20
”, switches S1, S2...S
6 are set to 0, 3, 5, 3, 8, and 2, respectively. Next, depending on whether the latitude is north or south, the switch SW is turned to the right or left. This operation causes the selection pulse generator P to switch B, SI. S
Pulses that sequentially select 2... are sent out at predetermined time intervals, and the binary codes corresponding to the numbers 0 to 9 set in each of the switches are transmitted via the interface 3 and the processing unit CPU. The data is added to the storage device RAM2 and stored at a predetermined address. In the above discussion, when the highest switch SI is discussed, at the same time a signal is applied to the "0" detector K to determine if the read value is "0" or something else. A determination is made as to whether it is a numerical value, and if the value is "0", a signal indicating that the above-mentioned KENTORI signal is a latitude is sent out from the detector K and simultaneously stored in the storage device RAM2. Next, switch SW
Restore the , thumbwheel switches S1, S2...
・Set the longitude in S6. In this case as well, by setting the units for each switch in the same way as in the previous case, and turning the switch SW to the right or left depending on whether the set value is East longitude or West longitude, each switch can be converted into a binary code. Signals 0 to 9 are sent out and written into the storage device RAM2. In addition, when setting the target position based on the arrival time difference of the fog waves emitted from the main station and the slave station, set the highest thumbwheel switch SI to a value in units of 10,000 microseconds, and follow S2, S3... ...1000 microseconds and 100 microseconds for S6 respectively...0.1
Settings are made in units of microseconds, and by tilting the switch SW in an arbitrary direction, the numerical values set on each switch are read and written into the storage device RAM2.

In this case as well, the signal of the thumbwheel switch SI is “0”.
``Detector K detects the signal, but in this case, since the above signal is always one of 1 to 8, the detector K does not send out a detection signal.As described above, the target position is stored in the storage device RAM2. can be written in terms of latitude and longitude or time difference, and also a discrimination code indicating whether they are latitude and longitude or time difference can be written in the storage device.

Therefore, when the operation switch CH is next operated to calculate the distance to the target position, for example, the processing layer CPU calculates the distance between the current position determined by the hyperbolic navigation receiver NS and the target position. is calculated and displayed on the display DP. As mentioned above, in the present invention, when setting the destination position etc. by latitude and longitude, it is set in this ^ lateral order, and the unit of the highest digit is 100 degrees, and when it is set by time difference, the unit of the highest digit is 100 degrees. The unit is 10,000 microseconds.

That is, the maximum value of latitude is 10 at the north or south pole.
Since it is 0 degrees, the highest digit is usually "0". On the other hand, in the case of a time difference, it always takes a value between loo00 and 90,000 microseconds, so if the highest unit is 10,000 microseconds, the setting value is 0 between 1 and 8.
It is absolutely impossible that this will happen. Therefore, when setting latitude and longitude, always set the latitude first, and by distinguishing whether the highest digit is 0 or another value, the set value will be determined as latitude and longitude. As described above, the present invention eliminates the need to specify whether a set value is latitude/longitude or a time difference by operating a switch, etc., and allows discussion of set values. Since the difference can be made based on the setting, there is no risk of operational errors and the setting operation is easy.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of the configuration of a hyperbolic navigation device to which the method of the present invention is applied, and FIG. 2 is a diagram showing a detailed configuration of a part of FIG. 1. In the figure, CPU is a central processing unit, IFI~
and 4 are interfaces, ROM is fixed storage memory, RA
M1 and RAM2 are temporary storage devices, NS is a hyperbolic navigation receiver, DP is a display, SET is a target position setter, CH is a work switch, B is a memory address designation switch, SI to S6 are thumbwheel switches, K is a "0" detector, P is a selection pulse generator, and SW is a cut-off switch. age/19 Shio Z nail

Claims (1)

[Claims] 1. When setting the vessel's navigational destination position etc. on a hyperbolic navigation device, when setting the above position in latitude and longitude, set the unit of the highest digit as 100 degrees and set it in the order of latitude and longitude, and When setting the arrival time difference between the radio waves emitted from the master station and slave station, the highest digit is 10,000 microseconds, and when reading them, the highest digit is 0.
The value read when is processed as latitude and longitude, and 0
A coordinate setting method for a hyperbolic navigation device characterized by processing other times as a time difference.