JP3186252B2 - 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.

[0002]

2. Description of the Related Art Conventionally, in order to grasp that an object at a fixed position has moved due to some kind of abnormality, a range previously set for an object which does not move basically is determined by a combination of a positioning device and a communication device. If it is determined that a departure has occurred, there is a known device that reports that fact.

[0003]

However, in the conventional position report information, only the result of the departure is reported, so that a prior measure cannot be taken and there is a problem that the response is delayed. For example, in buoys installed at sea,
If the buoy moves due to ocean currents or other causes, it is possible that a very dangerous condition may occur in the navigation of the ship. The present invention has been made in view of the above problems, and has as its object to provide a position reporting device capable of reporting a time when an object position is set in advance and expected to deviate from an allowable movement range and capable of taking a precautionary measure. It is.

[0004]

In order to solve the above-mentioned problems, a position reporting apparatus according to the present invention comprises: a positioning means for positioning a self-position using a satellite; and a position storage for storing permanent position information and an allowable movement range. Means, a determination means for comparing and determining the current position measured by the positioning means with the contents of the position storage means, and a transmission means and a reception means for transmitting and receiving information to and from a third party. It is.

[0005]

According to the present invention, with the above-described structure, information on the permanent position and the allowable movement range from a third party is received by the receiving means and stored in the position storage (registration) means, and the determination means makes successive determinations. The transmitting means can notify a third party of the time at which the own position is expected to deviate from the allowable movement range, and
It is possible to allow a third party to respond in advance, and to further facilitate the third party's judgment processing. Furthermore, the efficiency of resetting the permanent position and allowable movement range has been improved.
Safety can be improved.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a position reporting apparatus according to the present invention. FIG. 1 shows a block configuration of a position notification device according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an antenna unit for receiving or transmitting a signal to or from a satellite; A PSK demodulation unit for demodulating a received phase shift keying (PSK) signal, 4 is a PSK modulation unit for PSK modulating a transmission signal, and 5 is a PSK modulation unit 4.
A transmitter 7 amplifies the PSK-modulated signal to a required level and transmits the amplified signal, based on information such as satellite position information from the satellite, flight vector, frequency shift due to the Doppler effect, and time shift of the satellite output signal. A self-positioning unit for calculating a self-position, a position storage unit 8 for storing permanent position and permissible movement range information, and 6 analyzing a received signal from the PSK demodulation unit 3 to call the self-station and perform a call to the self-station and a permanent position and permissible movement. If the information is range information, the content is stored in the position storage unit 8, and further defined when the own position deviates from the allowable movement range based on the positioning result by the own position positioning unit 7 and the contents of the position storage unit 8. Is a control unit for creating the format of the above and sending information to the PSK modulation unit 4.

[0007] The operation of the position reporting device configured as described above will be described below. FIG. 2 shows a signal format in one embodiment of the present invention, FIG. 3 is a conceptual diagram of a system including a position reporting device, FIG. 4 is a reception flowchart of the position reporting device in one embodiment of the present invention, and FIG. It is a flowchart of a determination.

[0008] P at a predetermined frequency from the satellite
The SK-modulated signal is received by the receiver 2, amplified to a required level, and demodulated by the PSK demodulator 3. The demodulated signal is input to the control unit 6, it is determined by the control unit 6 whether the satisfied format prescribed shown in FIG. 2 (S _1). The prescribed format starts with a flag pattern indicated by 01111110 and ends with a similar flag pattern. If 1 continues for 6 or more patterns in the information other than the flag pattern, 1 is continuous for 5 patterns on the transmitting side, then 0 is inserted as a dummy bit and 0 is deleted on the receiving side. I will not do it. The address section has the number information of the destination station. The control section 6 receives the packet format data starting from the flag and collecting the packet format data by the flag, and performs a predetermined operation including a code error check bit indicated by a frame check sequence (FCS). And if it is determined that there is no code error, the contents of the own station number are compared with the destination number (S ₂ , S ₃ ),
If they do not match, it is determined that the communication is not addressed to the own station, and the subsequent information is discarded. If they match, the subsequent information is decoded and Table 1,
Performs a predetermined operation by the command code, as shown in FIG. _{2 (S 4, S 5)} .

[0009]

[Table 1]

Table 1 is an example of a command code. When the command code indicates a (11), determines a permanent position information and stores the contents in the position storage section 8 (S _7). When the command code indicates a (12), it is determined that the positional tolerance information and stores the contents in the position storage section 8 (S _6).

Next, the flow of position information comparison determination will be described. Paul.
E.Schmid, Jr Satellite Doppler-Data Processing Us
inga Microcomputer (Source IEEE TRANSACTIONS ON GEOSC
IENCE ELECTRONICS, VOL.GE-16, No4, OCTOBER 1978), so details are omitted. The positional relationship in the following description is illustrated in FIG. The control unit 6 determines the longitude and latitude of the own position calculated by the own position positioning unit 7 (hereinafter, Xr, Y
r to) and longitude of the permanent position stored in the position storage unit 8 and latitude (hereinafter Xb, and Yb) capturing (S _11).
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. Then calculate the average Ym of Yr and Yb (S _12). Using this calculated Ym, a distance Dlog per 1 ° of longitude at both average latitudes is calculated.
(S _13). Further, find the distance Dlat per 1 degree latitude
(S _14), calculates the distance DT between the current position and the permanent position
(S _15, S _16). If this DT is larger than a predetermined movement determination limit Dmin, it is determined that the object has started to move.
(S ₁₇ ), and the same measurement is performed after t hours (S ₁₈ ). Here, the movement determination limit Dmin is determined based on the accuracy of the positioning unit and the amount of steady object movement, and ignores ordinary small-scale movement of an object to prevent unnecessary traffic of the system. is there. Subsequently, a distance DT 'between the position after the time t and the permanent position is obtained. Since the movement per unit time is represented by DT′−DT / t, assuming that the allowable movement range in the content of the position permission information received in advance is DA, the range deviation time is (DA−DT ′) t / DT′−DT.
(S ₁₉ ). The result is reported to the monitoring station via the satellite by the command code 01 in the format of FIG. According to the above-described embodiment, in the application as shown in FIG. 7, it is detected in advance that a buoy installed at sea deviates from the allowable movement range and threatens the safety of a ship using the buoy as an indicator of navigation. By taking measures, accidents can be prevented.

[0012]

As described above, according to the present invention, the positioning means for positioning the own position using the satellite, the position storage means for storing the permanent position information and the permissible movement range, and the current position determined by the positioning means And the transmitting means and the receiving means for transmitting and receiving information to and from a third party, the permanent position and the allowable movement range from the third party. Information is received by the receiving means and registered in the position storage means, and the determination means makes successive determinations, and the transmitting means indicates to the third party the time at which the own position is expected to deviate from the permissible range of movement. Can be notified, unnecessary transmission of position information can be eliminated, and judgment processing by a third party can be facilitated. In addition, there is an effect that the efficiency of resetting the permanent position and the allowable movement range can be improved and safety can be improved.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a signal format in one embodiment of the present invention.

FIG. 3 is a conceptual diagram of a system including a position reporting device according to an embodiment of the present invention.

FIG. 4 is a signal reception flowchart in one embodiment of the present invention.

FIG. 5 is a flowchart of position determination according to one embodiment of the present invention.

FIG. 6 is a position-related diagram relating to position determination.

FIG. 7 is a diagram showing an application example of the position notification device.

[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).

Continuation of the front page (58) Fields investigated (Int. Cl. ⁷ , DB name) G01C 21/00-21/36 G01C 23/00-25/00 G01S 5/00-5/14 G08B 13/00-15 / 02 G08G 1/00-9/02

Claims (1)

(57) [Claims] 1. Positioning means for measuring a position of a vehicle using a satellite, position storage means for storing permanent position information and an allowable movement range, and a current position measured by the positioning means and the position storage means. A determination unit for comparing and determining the contents, and a transmission unit and a reception unit for transmitting and receiving information to and from a third party, and receiving the information on the permanent position and the allowable movement range from the third party by the reception unit, A position reporting device which registers in a position storage unit and makes a sequential determination by said determination unit, and notifies a third party of a time at which the own position is predicted to deviate from an allowable movement range by said transmission unit.