JP3108961B2 - Location reporting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position reporting device for preventing unnecessary communication traffic.

[0002]

2. Description of the Related Art Conventionally, in order to grasp that an object which should be at a fixed position has moved due to some abnormality, a result of a periodic positioning is monitored by a position notifying device by a combination of a self-positioning device and a position notifying device. Notify the station communication device,
It is considered that the monitoring station communication device achieves the above object by comparing and collating the positioning result with the fixed position of the object.

[0003]

However, in the conventional position reporting device, even if the object is not moving, it is necessary to periodically communicate with the monitoring station communication device, and useless communication traffic is generated. For example, in a monitoring station communication device that monitors the movement of many objects such as when applied to theft monitoring of a car, the processing is inevitably complicated, and there is a problem that reliability is reduced and system cost is increased. . Further, in a sign buoy or the like where the object is installed on the sea, collecting and re-setting the object in order to reset the fixed position and the allowable movement range inevitably involves a time loss and a risk of work.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a position reporting device that prevents unnecessary communication traffic and that can easily reset position information.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a position reporting apparatus according to the present invention stores own position measuring means for measuring own position using a satellite, and permanent position information and an allowable movement range. Position storage means, control means for comparing the current position measured by the self-position measurement means with the contents of the position storage means, transmission means and reception means for transmitting and receiving information to and from a third party It is constituted by

[0006]

According to the present invention, information on the permanent position and the permissible range of movement is received from a third party by the receiving means, registered in the position storage means, and sequentially determined by the control means.
Only when it is determined that the own position has deviated from the movement allowable range,
This can be reported to a third party by the transmission means, and unnecessary transmission of position information can be eliminated. Further, the judgment processing by a third party can be facilitated, and the efficiency of resetting the permanent position and the allowable movement range can be improved, and the safety can be improved.

[0007]

FIG. 1 is a block diagram showing the configuration of an embodiment of the position reporting device of the present invention, and FIG. 2 is a conceptual diagram of a system including the position reporting device of FIG. Position notification device shown in FIG.
Reference numeral 10 denotes a communication line with the monitoring station communication device 9 via a relay device of the orbiting satellite 11 (hereinafter, referred to as a satellite) as shown in FIG. Here, 1 shown in FIG. 1 is an antenna unit for receiving or transmitting a signal to or from the satellite 11, 2 is a receiving unit that tunes and receives radio waves received by the antenna unit 1 and amplifies it to a required level, and 3 is a receiving unit. PSK demodulation section for PSK demodulation of the PSK (phase shift keying) signal received in 2, PSK modulation section for PSK modulation of a transmission signal, 5 to a required level of PSK modulated signal in PSK modulation section The transmitting unit 6 amplifies the received signal from the PSK demodulating unit 3,
If the call is to the own station and the information is the permanent position and the movement allowable range information, the contents thereof are stored in the position storage unit 8. Is a control unit that creates a prescribed format when it is determined to deviate from the above, and sends information to the PSK modulation unit 4. Reference numeral 7 denotes a self-positioning unit for calculating a self-position based on information such as satellite position information from the satellite 11, flight vector, frequency shift due to the Doppler effect, and time shift of a satellite transmission signal, and 8 a permanent position and allowable movement range information. This is a position storage unit for storing.

[0008] The operation of the position reporting device configured as described above will be described below.

First, a reception flow (FIG. 3) for storing permanent position information and position allowable range information will be described. A signal PSK-modulated at a predetermined frequency from the satellite 11 is received by the receiver 2 and amplified to a required level.
The signal is demodulated by the K demodulation unit 3. The demodulated signal is input to the control unit 6, and the control unit 6 determines whether the signal format satisfies the prescribed signal format shown in FIG. 4 (S1).

The prescribed format starts with a flag pattern indicated by 01111110 and ends with a similar flag pattern. When 1 is continuous for 6 or more patterns in information other than the flag pattern, 0 is inserted as a dummy bit after 5 consecutive 1s on the transmitting side, and the 0 is deleted on the receiving side. There is no continuous six patterns.

The address section has identification number information of the destination station. The control section 6 receives the packet format data starting from the flag and ending with the flag, and outputs the code error check bit indicated by the frame check sequence (FCS). Perform a predetermined operation including, and if it is determined that there is no code error, collate the contents of the own station number and the destination identification number (S2), and determine (S3), if they do not match, addressed to the own station It judges that it is not communication and discards the subsequent information. If there is a match, the subsequent command codes are collated and decoded (S4).
As shown in FIG. 4, a predetermined operation is performed according to the command code (S5).

[0012]

[Table 1]

Table 1 is an example of a command code. When the command code indicates (11), the command is determined to be permanent position information, and the contents are stored in the position storage unit 8 (S7). When the command code indicates (12), it is determined that the command is position allowable range information, and the content is stored in the position storage unit 8.
(S6).

Next, the flow of the position information comparison judgment (FIG. 5) will be described. For a specific example of self-positioning,
By Paul.E.Schmid, Jr Satellite Doppler-Data Proces
singUsing a Microcomputer (Source: IEEE TRANSACTIONS
ON GEOSCIENCE ELECTRONICS, VOL.GE16, No.4, October
1978), so the details are omitted. Control unit 6
Is the longitude and latitude of the self-position calculated by the self-position positioning unit 7 (hereinafter referred to as Xr and Yr) and the longitude and latitude of the permanent position stored by the position storage unit 8 (hereinafter referred to as Xb and Yb).
(S8). At this time, the latitude is positive for north latitude and negative for south latitude, and the longitude is positive for east longitude and negative for west longitude. Next, Yr
And the average Ym of Yb is calculated (S9). This calculated Ym
And the distance D per 1 経 度 longitude at both average latitudes
Calculate log (S10). Furthermore, the distance Dla per 1 km of latitude
t is obtained (S11), and the distance D between the current position and the permanent position is calculated (S12, S13). The distance between the two points is compared with the allowable movement range Da stored in the position storage unit 8 (S14), and D> Da
If it is determined that the range is out of range, it is notified to the monitoring station communication device 9 via the satellite 11 by the command code (01) in the format of Table 1 and FIG. 4 (S15).

[0015]

As described above, the position notification device of the present invention receives the information on the permanent position and the allowable movement range from the third party by the receiving means, registers it in the position storage means, and sequentially judges by the control means. The transmission means can notify the third party only when it is determined that the own position has deviated from the movement allowable range, and unnecessary transmission of position information can be eliminated. Further, the judgment processing by a third party can be facilitated, and the efficiency of resetting the permanent position and the latitude allowable range can be improved, and the safety can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an embodiment of a position notification device according to the present invention.

FIG. 2 is a conceptual diagram of a system including the position notification device of FIG.

FIG. 3 is a reception flowchart of FIG. 1;

FIG. 4 is a diagram illustrating an example of a signal format.

FIG. 5 is a flowchart of position determination in FIG. 1;

[Explanation of symbols]

1 ... antenna unit, 2 ... receiver unit, 3 ... PSK demodulator unit,
4 PSK modulation section, 5 transmission section, 6 control section, 7
... self-positioning unit, 8 ... position storage unit, 9 ... monitoring station communication device, 10 ... position notification device, 11 ... orbiting satellite (relay device).

Claims (1)

(57) [Claims] 1. self-positioning means for measuring a self-position using a satellite, position storage means for storing permanent position information and an allowable movement range, and a current position measured by said self-positioning means. Control means for comparing and judging the contents of the position storage means, and transmission means and reception means for transmitting and receiving information to and from a third party, wherein the information on the permanent position and the allowable movement range is transmitted from the third party to the reception means And registering the position in the position storage means and sequentially determining by the control means. When it is determined that the own position has deviated from the allowable movement range, the transmitting means notifies the third party of the fact. Characteristic location reporting device.