JPH087073B2 - Vehicle-mounted position detection device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle-mounted position detection device, and in particular, a data processing device thereof is provided with a comparison means and a switching means, When the altitude data or speed data in the GPS type data deviates from a predetermined reference value, the switching means selects the corresponding self-sustaining type data from the vehicle-mounted position detecting device. .

[Prior Art] Transmitting radio waves from a plurality of artificial satellites to various moving bodies such as ships, aircrafts, automobiles, etc. in order to confirm or determine their current position, moving speed, etc. It has been noted that GPS positioning devices are useful. here,
A GPS positioning device is a global positioning system (Global Positi
Oning System) receives radio waves from a plurality of satellites belonging to an oning system, so that the current position of the moving object can be known.

As is conventionally known, a positioning operation performed using such a GPS positioning device is usually performed by receiving radio waves from three or more artificial satellites. Radio waves from a plurality of artificial satellites are simultaneously received by the vehicle as a moving body, and the difference between the clock provided on the artificial satellite side and the clock provided on the vehicle side. The position of the mobile body is detected from the position of each of the artificial satellites, based on the distance from each of the artificial satellites.

In addition, as a position detection device for the vehicle described above,
A so-called self-supporting type is also conventionally known. This self-contained device differs from the GPS-type device described above in that it does not rely on external data such as radio waves from artificial satellites, but only based on its own acquired data. It is made to be able to know.

Conventionally, such a GPS type positioning device and a self-supporting position detecting device are used together to form a required vehicle-mounted position detecting device. Then, in such a conventional device, when data can be received from three or more satellites for GPS, position data based on the GPS positioning data is adopted from the GPS type positioning device. On the other hand, when the above conditions are not satisfied, the position data based on the self-supporting data from the self-supporting position detecting device is adopted.

However, in such a conventional combined-type position detection device, even if an abnormal state occurs in the artificial satellite for GPS, when radio waves from three or more artificial satellites can be received, Position data based on this GPS positioning data will be adopted. Therefore, when such positioning of the vehicle by the artificial satellite for GPS is performed,
There is a drawback that an extremely abnormal value is displayed as the current position of the vehicle.

[Problems to be Solved by the Invention] As described above, in the conventional device, the GPS side position device and the self-supporting position detecting device are used together to form a required vehicle-mounted position detecting device. However, even if some abnormal state occurs in the satellite for GPS, if the radio waves from three or more satellites can be received, the position based on this GPS positioning data Since the data is adopted, there is a problem that when the vehicle is laterally positioned by such an artificial satellite for GPS, an extremely abnormal value is shown as the current position of the vehicle.

The present invention has been made to solve the above problems, and the data processing device thereof is provided with a comparison means and a switching means, and the altitude data or the speed in the GPS type data to be detected is detected. An object of the present invention is to obtain a vehicle-mounted position detecting device in which the corresponding independent data is selected by the switching means when the data deviates from a predetermined reference value. The vehicle-mounted position detecting device according to the present invention is a GPS type signal receiving means including an antenna and a receiver for receiving a GPS signal; Position detecting device for detecting the self-position of the moving body based on the type signal; GPS type data storage device for storing GPS type data based on the GPS type signal A self-supporting data storage device for storing self-supporting data based on the self-supporting signal; and performing necessary data processing for detecting the current position of the moving body based on the GPS-type data and the self-supporting data. A data processing device; the data processing device is provided with comparison means and switching means,
When the altitude data or speed data in the GPS type data to be detected deviates from a predetermined reference value, the switching means selects the corresponding self-supporting data.

[Operation] In the present invention, when the altitude data or speed data in the GPS type data to be detected deviates from a predetermined reference value as a result of the comparison by the comparison means in the data processing device, this also applies to the above The corresponding independent data is selected by the switching means in the data processing device.

[Embodiment] FIG. 1 is a block diagram for explaining an embodiment of the present invention. In FIG. 1, (5) is an antenna for receiving satellite radio waves, and the output side of this antenna (5) is a GP.
It is connected to the S receiver (6), the output side of which is connected to the data processing device (1). Further, the distance sensor (2) and the azimuth sensor (3) are for detecting the travel distance and the moving azimuth of the vehicle as a moving body, respectively, and both are equipped with the movement detecting device (4). It is connected via a data processing device (1). And, connected to the data processing device (1) are a GPS data storage device (7) and a self-supporting data storage device (8). The data processing device (1) includes a comparison means (1A) and a switching means (1B) which will be described later. Then, FIG. 2 is a flow chart for explaining the above embodiment.

Next, the operation of the embodiment shown in FIG. 1 will be described with appropriate reference to FIG.

First, in the start step (S21), the operator of the vehicle activates the apparatus of the above embodiment by, for example, pressing a start key on an appropriate key input unit. Next, in step (S22), it is determined whether or not the vehicle is positioned by the satellite. That is, it is determined whether GPS positioning data has been obtained. When the result of this determination is NO, the process moves to step (S27) and the position information based on the self-supporting data is output. On the other hand, when the result of the above determination is YES,
In the next step (S23), the altitude (H) data and the velocity (V) data in the GPS positioning data obtained previously are read. Then, in the subsequent step (S24), the altitude (H) data in the GPS positioning data is between a predetermined minimum reference value (H ₁ ) and a predetermined maximum reference value (H ₂ ). Whether or not it is determined. It should be noted that such a determination is made by the H in the comparison means (1A).
This is done by the comparison unit. The result of this judgment is
If NO, the process proceeds to the step (S27) described above, and the position information based on the self-supporting data is output. On the other hand, when the result of the above determination is YES, the process proceeds to the next step (S25), and for the speed (V) data in the GPS positioning data, a certain predetermined minimum reference value (V ₁ )
It is judged whether or not it is between a certain predetermined maximum reference value (V ₂ ). It should be noted that such a determination is made by comparing means (1
This is done by the V comparison section in A). When the result of this determination is NO, the process moves to step (S27) and the position information based on the self-supporting data is output. On the other hand, when the result of the determination is YES, the process proceeds to step (S26) and the position information based on the satellite positioning data is output. The switching means (1B) determines whether to output the position information based on the self-supporting data or to output the position information based on the satellite positioning data.

[Effects of the Invention] As described above, the vehicle-mounted position detection device according to the present invention is a GPS-type signal receiving means including an antenna and a receiver for receiving a GPS signal; a distance sensor for detecting a traveling distance of a moving body. And a position detection device that detects the self-position of the moving body based on a self-standing signal from a direction sensor that detects the moving direction thereof; a GPS type data storage device for storing GPS type data based on the GPS type signal;
A self-supporting data storage device for storing self-supporting data based on the self-supporting signal; and performing necessary data processing for detecting the current position of the moving body based on the GPS-type data and the self-supporting data. The data processing device includes a data processing device; and the data processing device is provided with a comparing means and a switching means, and when the altitude data or speed data in the GPS type data to be detected deviates from a predetermined reference value, Since the corresponding independent data is selected by the switching means, for example, even when radio waves from three or more artificial satellites can be received even if some abnormal state occurs in the artificial satellite for GPS. , By avoiding the use of position data based on this GPS positioning data, the effect of eliminating an extremely abnormal value as the current position of the vehicle is eliminated. Sent.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG.
The figure is a flow chart for explaining the operation of the above embodiment. (1) is a data processing device, (1A) is comparison means, (1B) is switching means, (2) is a distance sensor, (3) is a direction sensor, (4) is a position detection device, (5) is an antenna, (6) is a GPS receiver, (7) is a GPS data storage device, and (8) is an independent data storage device.

Claims (1)

[Claims] 1. A GPS type signal receiving means comprising an antenna and a receiver for receiving a GPS signal; a movement based on an autonomous signal from a distance sensor for detecting a traveling distance of a moving body and an azimuth sensor for detecting a moving direction of the moving body. Position detecting device for detecting self position of body; GP for storing GPS type data based on the GPS type signal
S-type data storage device; a self-standing data storage device for storing self-standing data based on the self-standing signal; and for detecting the current position of the moving body based on the GPS type data and the self-standing data A data processing device for performing required data processing; a vehicle-mounted position detecting device including; a data processing device provided with a comparing means and a switching means, among the GPS type data to be detected. The vehicle-mounted position detection device, wherein when the altitude data or the speed data of a given value deviates from a predetermined reference value, the corresponding independent data is selected by the switching means.