JPS58193473A - Position measuring system for composite hyperbolic navigation - Google Patents

Abstract

PURPOSE:To select a system allowing the decision of ships position at the highest accuracy from a plurality of systems different in characteristics in the effective coverage and the position decision accuracy by inputting rough positional information of a moving object when the position thereof is measured by respective system. CONSTITUTION:Receivers of a hyperbolic navigation assistance system different in characteristics in the effective coverage and the position decision accuracy, for example, a decca receiver 1, a loran receiver 2 and an omega receiver 3 are arranged. A signal converter 4 generalizes the form of output signals of the receivers 1, 2 and 3. A control processor 5 comprises a means 51 of temporarily storing output signals of the converter 4 for respective hyperbolic navigation assistance system, means 52 and 53 of switching signals of the means 51, a means 54 of computing signals or the like from the means 51 and a means 55 of controlling those means. A desplay 6 indicates the information from the device 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite hyperbolic navigation and positioning system that performs measurements using a number of turret systems and selects the optimal one from among them to determine the position.

Until now, navigation aid systems that use hyperbolic coordinates to determine the position of moving objects such as navigating ships or airplanes have utilized the difference in arrival time of radio waves, such as the Detsuka method, Loran A method, Loran C method, and Omega method. Various systems have been proposed and are actually in the operational stage. These hyperbolic navigational aid systems have varying effective coverage and positioning accuracy depending on their method. Generally, the wider the effective coverage area, the lower the positioning accuracy.

Therefore, it is important to decide which of these methods to use depending on the navigational position of a moving object such as a ship. For example, a mobile object navigating the open ocean may choose the Omega method, which enables worldwide service even if it sacrifices some accuracy; It was common to choose the Loran C method, the Detsuka method, etc., with emphasis on high accuracy. Here, the accuracy of each method is the frequency of the radio wave,
Not only due to propagation speed, intersection angle and divergence of position lines, etc.
In addition, the effective notification range with accuracy that satisfies the method is also affected by the geographical conditions of the area of use, atmospheric noise, etc., so if the method to be used is determined only based on the approximate location, it is not necessarily possible to select the optimal method. I was jealous.

In the past, for ships and aircraft, operators judged which method among the hyperbolic navigation aid systems currently in use would allow for position determination with the highest accuracy, and the measurement data using that method was used. The position of the moving object was determined by plotting it on a chart.

Therefore, the selection of the method to be used depends solely on the ability and experience of the operator, which is inconvenient for users with a wide range of activities.

The present invention has been made with attention to this point, and the present invention measures the position using a plurality of methods with characteristically different effective notification ranges and position determination times, and inputs approximate position information of a moving object. The purpose of this project is to provide a composite hyperbolic navigation positioning system that selects the system that can determine the position with the highest accuracy from among these multiple systems and also evaluates its error. While sequentially and periodically performing data capture and calculation processing of position data based on the data using each of the methods, inputting general position information of the mobile object, and determining priority of each of the above methods according to this general position information, Next, in order from the method with the first priority, a reference line corresponding to the trajectory of the moving object is derived based on the position data calculated by the method, and the dispersion of the position data from these 11 single lines is determined. The present invention resides in a composite hyperbolic navigation positioning system characterized by determining the suitability of positioning by that method by identifying whether or not the method falls within the above range, and also creating error evaluation information based on the variation thereof.

Embodiments will be described in detail below according to embodiments shown in the drawings.

FIG. 1 shows a block die ""'5 showing an embodiment of the present invention.
1'T''''・msc*ri・2J5c(,F3Ltt
, + are characteristically different in the effective communication range and the position determination degree. For example, 1 is a Decka receiver, 2 is a Rofun C4i receiver, and a 3μ Omega receiver. 4 is the reception of each hyperbolic navigation aid system 1
11. This is a signal conversion device for unifying the formats of the output signals of 2 & 3 and 3. 5 is a signal change iI! as shown in detail in FIG. Storage means 51 for temporarily storing output signals of the device 3 for each hyperbolic navigation aid system; switching means 52 and 53 for switching the signals of the storage means 51; Arithmetic processing means 5 for processing signals etc. from storage means 51
4 and a control means 55 for controlling these various means. 6 is a display device for displaying information from the control processing device M5, and 7 is a communication terminal device for communicating with the base of the mobile body such as the ship.

Next, the operation of the composite hyperbolic navigation and positioning system configured in this manner will be explained.

First, initial values such as general position information 5, time information, etc. are input to terminal I of the signal conversion device 4. Then, initial latitude and longitude calculations are performed for each method. The time required for this calculation f
It is about 10 seconds for Detsuka and about 8 seconds for Loran C.
Seconds, for Omega (° Finishes within about 15 seconds.Here -
(・, This rough position information indicates the navigation position of the mobile object in latitude, #
Ik degree coM “Hiro” el! The degree of accuracy (・expressed) is ``. Using the initial correspondence of 81 eyes 11 and 14 r, we periodically calculate the 11 degrees and longitudes of each 11 degree and longitude.The period is about 15 seconds and the calculation value for each equation is It is converted into a 4-format message (digitalized and transferred to the arithmetic processing unit 5).

In the arithmetic processing axis 15, this information is temporarily stored in the storage tank + equipment 511. That is, the information μm1iJ 1 from the multiple number conversion device 4
The data is stored in the corresponding storage 1 rear by the operation of the switch #1j52 under the control of the 11 means 55. Lko(°.

A Meishin command, which is essential for -j control, is input to the terminal C of the arithmetic l1lJ control device 5, and the 111 m11 means b5 transfers the approximate position WItI4 information from the signal converter 4 to the arithmetic processing means 54. Based on this rough position information, the arithmetic processing means 540 prioritizes the hyperbolic navigation aid systems in which the receiver is installed, namely Detsuka, Loran C, and Omega, depending on the degree of positioning accuracy. Put on.

This priority order is determined in a simple manner by taking into consideration the station coordinates of each system, the frequency of radio waves, the propagation speed, and factors unique to each system. These conditions are stored in advance in the memory within the arithmetic processing means 54 on a worldwide scale. As a result, for example, if the priority order is determined among the Detsuka method, Loran method, and Omega method, this is sent back to the control means 55.

The control means 55 controls the switching means 53 according to this priority order.
In ljwJL, the calculation results of latitude and longitude are successively obtained from the area assigned to the detsuka method of the storage means 51 and sent to the arithmetic processing means 54, where a reference line corresponding to the track of the mobile object is derived. As mentioned above, this work involves statistically processing the temporal carbonization of the latitude and longitude calculation result data obtained at approximately 15 second intervals to obtain a reference line. It can be determined by a method such as quadratic regression that approximates a quadratic curve, linear regression that approximates a folded ring, etc. The line indicated by A in FIG. 3 is the reference line derived in this way. Next, the calculation process @[54 sets an error region B of a predetermined width on both sides of this reference line A, and if the data d of each calculation result is within this error region B, the navigation position In this case, it is determined that the DETSKA method is the optimal hyperbolic navigation aid system, and this is notified to the control means 55. l1l one means 55
As a result, the arithmetic processing means 54 processes the degree of variation from the reference line A of the data hyperbolic navigation aid system of the 81 results using a statistical method, and creates WA difference evaluation information at that navigation position, Calculate incidental matters such as direction of travel, speed, distance to destination, etc. Next, this information is sent to the display device 6 to display the name of the usage method, location information of the moving object, its 11I difference evaluation information, additional information, etc., and this information is transferred via the communication terminal 61117. Communication of the base where the body is located also transmits to one station.

Here, as a result of the above discrimination, if there are some data in the hyperbolic navigation aid system of each calculation result that do not fall within the error area B, then the Detsuka method is not necessarily a suitable navigation aid at this navigation position. It is determined that it is not a system, and this is notified to the control means 55. -) The means 55 thereby controls the switching means 53 to read data from the area assigned to the Loran method of the second priority, and transfers it to the arithmetic processing means 54. Next, in exactly the same way as in the case of the Detsuka method, it is determined whether all the data falls within the error range of the derived reference line, and if it does, it is determined that the Loran method is optimal, and the procedure is repeated as in the case described above. Similar processing is performed, and if the results are not satisfied, the same processing is performed using the omega method with the third priority.Here, the method with the first priority calculated by the arithmetic processing means 54 is not necessarily the optimal method. This is because the conditions at the navigation position change over time, depending on the weather conditions at that time, the relationship between surface waves and spatial waves, etc.

As explained in detail above, according to the compound hyperbolic navigation positioning system of the present invention, simply input the latitude and longitude information of the navigation position roughly in degrees, and the machine will automatically do the rest. Not only can accurate position information be obtained by selecting a suitable method, but also the W/J4 seizure price of that position information is carried out, so there is very little dependence on the ability and experience of the operator, and it is difficult to take action. The effects of its use are remarkable among a wide range of users.

Although the system in which processing automatically proceeds has been described based on the embodiments, the compound hyperbolic navigation positioning system of the present invention is not limited to this, for example,
Various variations are available, such as displaying the appropriateness of positioning for each method on the display@stomach, and manually determining whether or not to perform positioning processing using that method based on signals input by the operator. It includes.

[Brief explanation of drawings]

FIG. 11IJ is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of an example of the control processing device, and FIG. 3 is a diagram for explaining its operation. 1.2.3...Hyperbolic navigation aid system receiver 4...Signal conversion wheel weight, 5...Control processing device, 6...Display device , 7... Communication terminal section, 51... Storage means, 52.53...
- Switching means, 54... Arithmetic processing means, 55...
... Control means, A ... Reference line, B ...
...Error area, d...Data. Patent Applicant Sanko Kisen Co., Ltd. Figure 1 @ Figure 2 420-3i! i

Claims (1)

[Claims] In a composite hyperbolic navigation positioning system that determines the position of a moving object using a plurality of hyperbolic navigation aid systems, data is taken in by each of the above formulas and position data is processed in sequence and periodically based on the data. h. Input the approximate position information of the moving object, determine the priority touch position of each of the above methods according to this general position information, and then sequentially select the priority position of each method from V111 priority order 1lf- In the evening, a reference line corresponding to the trajectory of the moving object is derived, the dispersion of the position data from these 11 single lines is determined, and it is determined whether or not this falls within a predetermined width (6).
1. A combined hyperbolic navigation positioning system characterized by determining the suitability of positioning using a formula and creating w4 difference IN' value information based on the variation thereof.