JPS6316734A - Antenna directional data registering device for satellite broadcasting reception system - Google Patents

Abstract

PURPOSE:To facilitate rearrangement to the sequence of the data position of a registered broadcasting satellite, by adding and registering a pointer data which indicates the connection of a registration data having the nearest position data out of other registration data, as a directional data, with the position data of a satellite. CONSTITUTION:A registering means registers a forward pointer data FP, and a backward pointer data BP on an EAROM, as the directional data of one satellite, with the position data. At this time, when the satellites are registered in a sequence of A, B, D, the forward pointer data FPs are connected cyclically in the sequence of A, B, D, A, and the backward pointer data BPs, in the sequence of D, B, A, D, respectively. At such a time, when an antenna is directed to the satellite C, and the directional data C=30 is registered, by connecting and registering the forward pointer FP, and the backward pointer BP to registration data B=20, and D=40 having the nearest position data, it is possible to retrieve the satallite in the sequence of the satellites by tracing the FP and BP.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an antenna direction data registration device for a satellite broadcast receiving system.

(Prior Art) As is well known, a satellite broadcast receiving system receives broadcasting satellites from a plurality of broadcasting satellites A, B, . By selecting, you can receive the desired satellite broadcast. In this case, the direction data of the antenna 11 for each broadcasting satellite A, B, . Based on this calculation result, the antenna 11 is
Automatic selection is possible by controlling the orientation of.

A readable and writable nonvolatile memory (hereinafter referred to as EAROM) is generally used as the storage device F13.

By the way, when registering antenna direction data for each broadcasting satellite in the storage device as described above, first, the direction of the antenna is manually changed to point it at the desired broadcasting satellite, and then the direction data at that time is registered. However, in the United States, for example, broadcasting satellites are spaced at intervals of about 2 degrees, and when the satellite spacing is narrow, it is difficult to determine which broadcasting satellite is sending the broadcast. is often extremely difficult. Furthermore, not all satellites are broadcasting at the same time, and in this case, it is not possible to register all antenna direction data at the same time. Conversely, unnecessary broadcasting satellites may not be registered.

Therefore, if you know the positional relationship between a registered broadcasting satellite and a newly registered broadcasting satellite, you can easily select a new broadcasting satellite from among the registered broadcasting satellites based on that positional relationship. A registration method for finding and registering information is being considered. In this case, the registered broadcasting satellite data is rearranged in order of position as shown in Figure 6.
If it were possible to search in order of location, the search would be very easy. However, if an attempt is made to simply rearrange the data using a conventional sorting algorithm, all registered data must be placed in a work area (RAM), which requires a large amount of work area. Furthermore, the number of data replacements may increase significantly depending on how the data is arranged.

Therefore, the registration device using the above-mentioned registration means,
In a computing device with a small work area, such as a one-chip microcomputer, it is difficult to rearrange registered broadcast satellite data in order of position.

In other words, even if you rearrange the order on the EAROM, the EAROM
The number of times that M can be written is limited, and furthermore, the writing time for one piece of data is about 40 seconds, which poses many practical problems.

(Problems to be Solved by the Invention) This invention solves the problem that, since the conventional registration device requires a large amount of work area, when a storage device with a small work area w4 is used, data of registered broadcasting satellites can be stored. The problem that was difficult to rearrange in order of position has been improved, and the number of times it is written to the storage device is kept to the minimum necessary. Even a calculation device with a small work area can easily store registered broadcasting satellite data in the order of position. An object of the present invention is to provide an antenna direction data registration device for a satellite broadcast receiving system that can be rearranged in order.

[Structure 1 of the Invention (Means for Solving Problems) That is, the antenna direction data registration device for a satellite broadcast receiving system according to the present invention stores each direction data for directing an antenna to a plurality of broadcasting II stars. When registering,
The direction data is characterized in that, together with the satellite position data, pointer data indicating a connection with the registered data having the closest position data among other registered data is added and registered. .

(Operation) In other words, when searching for registered direction data, the registration device with the above configuration can search in the order of the broadcasting satellites by following the pointer data.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 is for explaining the registration means, and shows a case in which direction data is registered in the EAROM by an arithmetic unit with a small work area, such as a one-chip microcomputer. In other words, this registration means is
Direction data for one broadcasting satellite includes, along with position data, a satellite name, forward pointer data F, P, and backward pointer data BP indicating the connection with registered data having the closest preceding and following position data to the position data.
is registered, for example, in the above-mentioned EAROM.

Now, assume that the direction data for satellites A, B, and D have been registered, and the position data for each satellite is A=10, B-20, D-4.
Assume that it is 0. In this case, if A, B, and D are registered in this order, the forward pointer data FP will be A, B, and D as shown in FIG.

In the order of A, backward pointer data B P G, t
D.

B, A, and D are connected in a cyclical manner. here,
When pointing the antenna toward satellite 1c and registering the direction data C-30, the forward pointer F is set to the registered data B-20 and D=40, which have the closest position data, as shown in Fig. 3.
If P and backward pointer BP are connected and registered, it becomes possible to search in the order of satellite positions by tracing FP and BP.

Here, a flowchart for the case of additionally registering one piece of data in addition to the list of registered data already connected by pointer data FP and BP will be described with reference to FIG. 4. In addition, here, the storage area for writing the satellite position data is 5ATPTR,
FW storage area to write forward pointer data FP
, BW1 is the storage area where back pointer data BP is written.
Position data indicating the direction of the antenna is ANTPO8, position data indicating the direction of the satellite is 5ATPO8, and data indicating a state where there is no data in the storage area is EMPTY.

The data indicating the smallest array (satellite) of the direction data of Annate is expressed as MIN, and the data indicating the largest array (satellite) is expressed as MAX.

Step A Determine whether the satellite is registered.

Step B If no satellites were registered in Step A,
Write the following.

5ATPTR: =EMPTY FW Knee EMPTY BW Knee EMPTY MIN Knee EMPTY MAX Knee EMPTY Step C If at least one satellite has been registered in Step A, perform the following writing.

BW: -MAX SATPTR: =M I N Further, pointer data FP and BP of the array (satellite) pointed to by 5ATPTR are read, and FW is executed.

Write to BW.

Step D ANTPO8 of the array (satellite) pointed to by SATPTR
Read and write to 5ATPO5.

Step E ANTPO8; Determine whether it is 1esATPO8.

Step F When it is determined in step E that ANTPoS≧5ATPO8, the FP of the constellation (satellite) pointed to by the FP
, BP is read and written to FW and BW. Furthermore, write the following.

BW: -8ATPTR ’ 5ATPTR knee FW Step G Determine whether SATPTR-M is IN.

If it is determined that it is not SATPTR-MIN, the process returns to step D.

Step H If SATPTR-M I N is determined in step G, MAX:=EMPTY is set.

Step I If it is determined in step E that ANTPO8≧5ATPO8, then ANTPO8<5ATPO8 and SAT
It is determined whether it is PTR-MIN. If not, return to step D.

Step J Step 771 ANTPO8<5ATPO8 and SA
If it is determined that it is TPTR-MIN, it is set as MIN knee EMPTY.

If step H or J is executed, 5ATPTR knee EMPTY and B of the array (satellite) pointed to by FW.
Rewrite the data written in P@5ATPTR,
FP of the array (satellite) pointed to by BW is 5ATPTR1
,: Rewrite the written data.

Step L FP to the array (satellite) pointed to by SATPTR.

Write BP, ANTPO8, and registered satellite core.

In accordance with the above flowchart, for example, as shown in FIG. 3, when C is additionally registered when A, B, and D are already registered, the number of times the data is written to the EAROM is only twice.

Therefore, by using the above-mentioned registration means, it is possible to search for broadcasting satellites in the order of their positions, which has the following advantages.

(1) It is possible to reliably grasp the positional relationship of broadcasting satellites.

(2) The position of the broadcasting satellite to be newly registered can be easily found from the positional relationship of the broadcasting satellites.

(3) Even when moving the antenna manually, it is easy to display the satellite center when the antenna is moved to a position where the broadcasting satellite can be captured.

(4) The work area may be very small because it is not necessary to bring all the data onto the work area. therefore,
Rearrangement can be realized even in a one-chip microcomputer with a limited work area.

(5) When registering new data, the number of times it is written to the EAROM is only two times other than the data to be registered.
The time until the EAROM write limit is reached is extended.

[Effects of the Invention] As described above, according to the present invention, the number of times of writing to the storage device is kept to the minimum necessary, and even a computing device with a small work area can easily store data of registered broadcasting satellites in order of position. It is possible to provide an antenna direction data registration device for a WJu broadcast receiving system that can be rearranged.

[Brief explanation of the drawing]

1 to 4 are for explaining an example of an actual flow of an antenna direction data registration device for a satellite broadcasting receiving system according to the present invention, and FIG. 1 is a diagram showing a storage format of registration data, and FIG. Figure 2 shows the connection of pointers before registering new data, Figure 3 shows the connection of pointers when new data is registered, and Figure 4 shows the connection when registering new data. FIG. 5 is a block diagram showing the configuration of a satellite broadcast receiving system to which the present invention is applied, and FIG. 6 is a diagram for explaining conventional data registration means. 11... Antenna, 12... Drive device, 13...
Storage device, 14... Arithmetic device, FP... Forward pointer data, BP... Backward pointer.
data. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] In an antenna direction data registration device for a satellite broadcast receiving system that registers each direction data for directing an antenna to a plurality of broadcast satellites, the direction data includes satellite position data and the nearest position data among other registered data. 1. An antenna direction data registration device for a satellite broadcasting receiving system, characterized in that the antenna direction data registration device for a satellite broadcasting receiving system is registered by adding pointer data indicating a connection with registration data having the following information.