JPH0587904A - Card-type position detecting apparatus - Google Patents

Abstract

PURPOSE:To detect the receiving position of signals at a place of many noises by receiving a marker in the time axis from a ground transmitting device and the electric waves of the positional data corresponding to the position of the transmitting device. CONSTITUTION:The electric waves received by an antenna 11 are the waves transmitted from five transmitting devices 31-35 in an area 36. The transmitting devices 31-35 transmit the electric waves indicating the respective codes, markers in the time axis and the information of the transmitting time of the markers. A position detecting/receiving part 12 receives the electric waves from four of the five devices showing tone strong intensity of the electric field, and operates an expression of relation of variables of the position and time, etc., for each wave. Consequently, based on the operating result, data of the number of the corresponding map and the display position of dots, and numerical values indicating the latitude and longitude are sent as a position signal to a point, display part 13. The number of the map is displayed by the part 13. True current position is obtained from the map designated by the number.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card type position detecting device for detecting a reception position by receiving a radio wave in which a marker on a time axis and position information corresponding to the transmission position are transmitted.

[0002]

2. Description of the Related Art As a device for detecting the current position on the ground or the like, a GP transmitted from an artificial satellite in an orbit
A device is provided for detecting its position by receiving an S signal.

[0003]

Since the above device is configured to perform position calculation based on GPS signals transmitted from artificial satellites that orbit the orbit, reception of GPS signals with weak electric field strength is performed. It must be made. Therefore, in a place where there are many noise sources, such as an urban area, there is a problem in that GPS signals cannot be received due to the influence of noise from these sources, and the reception position cannot be detected. The present invention was created to solve the above problems, and an object thereof is to provide a card-type position detection device capable of detecting a reception position in a noisy place.

[0004]

In order to solve the above problems, a card type position detecting device of the present invention is transmitted from a transmitting device installed on the ground, and position information corresponding to the positions of the marker and the transmitting device on the time axis. It is applied to a card-type position detection device that detects the reception position by receiving radio waves transmitted by and, and a position detection receiver that sends out a position signal indicating the reception position by receiving radio waves, and this position detection And a spot display unit for displaying the position signal sent from the receiving unit. Further, a configuration including a GPS receiving unit that detects a reception position by receiving a GPS signal is adopted.

[0005]

1 is a block diagram showing the electrical construction of an embodiment of the present invention.

In the figure, an antenna 11 for receiving a radio wave, the details of which will be described later, is connected to a position detection reception unit 12, and the output of the position detection reception unit 12 is given to a point display unit 13. An antenna 15 for receiving GPS signals is connected to the GPS receiver 16 and
The output of the reception unit 16 is sent to the spot display unit 13. The GPS receiving unit 16 is provided with the output from the position detecting receiving unit 12, and the point display unit 13 is provided with the output from the operating unit 14.

FIG. 2 is an external perspective view showing an embodiment of the present invention.

The card-type position detecting device is composed of two blocks, a card-like detecting device main body 21 and a flat lid portion 22, and the lid portion 22 is attached to the detecting device main body 21 by a hinge 23. .. And inside the lid portion 22,
Among the blocks forming the GPS receiving section 16, a block for high-frequency signal processing and the antenna 15 are housed, and among the blocks forming the position detection receiving section 12, a block for processing high-frequency signals and the antenna 11. And are stored.

On the hinge 23 side of the upper surface of the detection device main body 21, there is provided a spot display section 13 constituted by a liquid crystal display, and on the side facing the hinge 23, an operation consisting of a plurality of key switches. A section 14 is provided. Also GPS
The signal processing unit after the high frequency signal processing in the reception unit 16 and the signal processing unit after the high frequency signal processing in the position detection reception unit 12 are both provided inside the detection device main body 21.

The operation of one embodiment of the present invention having the above configuration will be described below.

As shown in FIG. 3, the radio wave received by the antenna 11 is transmitted from five transmitters 31 to 35 installed on mountain peaks apart from each other in a sufficiently wide flat area 36 such as the Kanto Plain. It is a radio wave transmitted. Each of the transmitters 31 to 35 transmits a radio wave indicating a transmitter code which is position information corresponding to the position, a marker on the time axis, and time information indicating the transmission time of this marker. Further, the accuracy of the marker is set so that the error is within 1 nS in each of the transmission devices 31 to 35.

The position detection receiver 12 receives radio waves from four transmitters 31 to 35 having strong electric field strength among these five transmitters 31 to 35. Then, for each of the radio waves from these four transmitters, variables X, Y, and Z indicating the position,
An equation showing the relationship between the four variables of the variable T indicating the time is calculated. This calculation requires the difference in the reception time of the markers of the radio waves from the four transmitters, the time information of each marker, and the information indicating the installation position of the transmitters 31 to 35. It is obtained as a counter value inside the position detection reception unit 12, and the time information is obtained as data transmitted by each radio wave. Further, as the information indicating the installation position, the data already stored in advance in the position detection reception unit 12 is used as the data corresponding to the transmission device code which is the position information.

As a result, four equations having four variables are calculated. Then, by treating these four equations as simultaneous equations, the numerical values of the four variables are calculated.
Then, based on the calculation result, data indicating the corresponding map number and dot display position and a numerical value indicating latitude and longitude are sent to the point display unit 13 as a position signal.

Since the number of the map is displayed on the point display unit 13, the user can select the map designated by the number from the plurality of maps in which the city map is drawn on the transparent base. Place it on the surface of. Therefore, the dot displayed on the spot display unit 13 indicates the position on the placed map, and this position indicates the current position.

As described above, the position detecting / receiving unit 12 receives the radio waves from the four transmitters having a strong electric field strength among the radio waves transmitted from the five transmitters 31 to 35. Since the moved position of is away from area 36,
When the electric field strength of the radio waves from these four transmitters is not sufficient and the position cannot be calculated, an output indicating that is output from the position detection receiver 12 to the GPS receiver 16.
Sent to. GPS receiver 16 given this output
Detects the reception position based on the GPS signal received by the antenna 15 and outputs an output indicating the position to the point display unit.
Send to 13. Therefore, the point display unit 13 displays the reception position on the map by the same operation as that already described.

FIG. 4 is an explanatory view showing the second embodiment of the present invention.

In the figure, the transmitters 41 to 44 are installed at the intersection where the main roads 41 intersect, and the marker transmission time is set to be the same for all the transmitters 41 to 44. There is. Position detection receiver in this embodiment
12 is a variable X, Y, Z indicating the position and a variable T indicating the time from the difference between the reception times of the markers of the radio waves from the transmitters 41 to 44 and the transmitter code of each transmitter 41 to 44. Four equations consisting of two variables are derived, the value of each variable is calculated from the derived equations, and the calculation result is sent to the point display unit 13 and displayed. Then, when the present apparatus is not used, the lid section 22 and the detection apparatus main body 21 are carried in a closed state.

The present invention is not limited to the above-mentioned embodiment, but includes the antenna 11, the position detection receiver 12, the antenna 15 and the GPS receiver 16, and the electric field strength of the radio wave received by the antenna 11 becomes insufficient. The case where the GPS receiving unit 16 is operated at this time has been described, but the antenna 11 and the position detecting receiving unit 12 are omitted, and the GPS receiving unit 16 is always operated so that the reception position is displayed. It is possible to have a configuration in which it is displayed on 13.

[0019]

The card type position detecting device according to the present invention is
Using the position detection receiving unit, as a configuration for receiving a radio wave from a transmitter installed on the ground, which transmits a marker on the time axis and position information corresponding to the position of the transmitter to detect the position. Since a radio wave having a sufficiently strong electric field strength is used, it is possible to detect the reception position even in a noisy place.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of an embodiment of the present invention.

FIG. 2 is an external perspective view showing an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a position of a transmission device according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 12 Position detection receiver 13 Point display unit 16 GPS receiver 31 to 35 transmitter 41 to 44 transmitter

Claims (2)

[Claims] 1. A card-type position for detecting a reception position by receiving a radio wave transmitted from a transmitter installed on the ground and transmitting a marker on a time axis and position information corresponding to the position of the transmitter. A detection device, comprising: a position detection receiving section for transmitting a position signal indicating a reception position by receiving the radio wave; and a point display section for displaying the position signal transmitted from the position detection receiving section. A card type position detecting device characterized by the above. 2. A card type position detecting device comprising a GPS receiving section for detecting a receiving position by receiving a GPS signal.